[PPT] - 0-lep. SUSY Searches from ATLAS and CMS Chris Young, CERN 16th PowerPoint Presentation

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN 16th March 2016 Moriond EW 1 / 63

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Introduction

◮ Supersymmetry is one of the most favoured extensions of the Standard

Model (SM) of particle physics.

◮ It postulates the existance of partner particles for all the SM particles. ◮ There have been many searches for such particles and here I will cover

the latest results from ATLAS and CMS in channels without leptons.

◮ These are some of the most sensitive channels for many supersymmetric

models as seen from the parameter scans performed after Run I [1][2].

◮ ATLAS has produced 3 separate results for 3 different signatures;

1. 0-lep. + ≥2-6 jets + E miss

T

[ATLAS-CONF-2015-062]

2. 0-lep. + ≥7-10 jets + E miss

T

[1602.06194]

3. 0/1-lep. + ≥3-b-jets + E miss

T

[ATLAS-CONF-2015-067]

◮ CMS have produced 4 separate results utilizing different approaches;

1. HT and Hmiss

T

search [1602.06581]

2. MT2 based search [1603.04053]
3. αT based search [CMS-PAS-SUS-15-005]
4. Razor variables based search [CMS-PAS-SUS-15-004]

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

The Signatures We Search For

◮ The focus at the start of Run I has been searches for gluino production in

R-parity conserving models due to the large x-section increase.

◮ The lightest supersymmetric particle is neutral and passes through the

detector undetected in these models →E miss

T

.

◮ The searches are all therefore characterised by jets + E miss

T

.

Main background Signal

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Variables used to define signal regions (ATLAS)

The ATLAS ≥2-6 jets and ≥3-b-jet analyses are both largely based around the variable; meff = E miss

T

+

pjet

T

and also use cuts on ∆φ(jet, E miss

T

) to reduce the multi-jet background. For ˜ g → t¯ t ˜ χ0

1, ≥3-b-jets also cuts on the

number of high mass large radius jets.

Events 1 10

2

10

3

10

4

10

5

10

6

10 ATLAS Preliminary

1

= 13 TeV, 3.3 fb s Gtt 0-lepton pre-selection Data 2015 Total background t t Single top + W/Z/h t t Z+jets W+jets Diboson 100) × σ = 1600, 200 (

1 χ ∼

, m

g ~

Gtt: m 100) × σ = 1400, 800 (

1 χ ∼

, m

g ~

Gtt: m

Number of top-tagged jets 1 2 3 4 Data / SM 1 2

They also use mmin

T

(b-jets, E miss

T

) which has an end-point for semi-lep. t¯ t.

Events / 25 GeV 1 10

2

10

3

10

4

10

5

10 ATLAS Preliminary

1

= 13 TeV, 3.3 fb s Gtt 0-lepton pre-selection Data 2015 Total background t t Single top + W/Z/h t t Z+jets W+jets Diboson 100) × σ = 1600, 200 (

1 χ ∼

, m

g ~

Gtt: m 100) × σ = 1400, 800 (

1 χ ∼

, m

g ~

Gtt: m ) [GeV] miss T (b-jets,E min T m

50 100 150 200 250 300 350 400 Data / SM 1 2

The ATLAS ≥7-10 jet search counts the number of jets pT > 50, 80 GeV with |η| < 2, bins in the number of b-jets, and requires E miss

T

/ √ HT > 4 GeV1/2 motivated by the multijet background estimation (see later).

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

ATLAS Signal Regions (for reference)

The 7 ≥2-6 jet search signal regions:

Requirement Signal Region 2jl 2jm 2jt 4jt 5j 6jm 6jt Emiss

T

[GeV] > 200 pT(j1) [GeV] > 200 300 200 pT(j2) [GeV] > 200 50 200 100 pT(j3) [GeV] > – 100 pT(j4) [GeV] > – 100 pT(j5) [GeV] > – 100 pT(j6) [GeV] > – 100 ∆φ(jet1,2,(3), Emiss

T

)min > 0.8 0.4 0.8 0.4 ∆φ(jeti>3, Emiss

T

)min > – 0.2 Emiss

T

/√HT [GeV1/2] > 15 20 – Aplanarity > – 0.04 Emiss

T

/meff(Nj) > – 0.2 0.25 0.2 meff(incl.) [GeV] > 1200 1600 2000 2200 1600 1600 2000

The 15 ≥7-10 jet search signal regions:

8j50 8j50-1b 8j50-2b 9j50 9j50-1b 9j50-2b 10j50 10j50-1b 10j50-2b n50 ≥ 8 ≥ 9 ≥ 10 nb−jet — ≥ 1 ≥ 2 — ≥ 1 ≥ 2 — ≥ 1 ≥ 2 Emiss

T

/√HT > 4 GeV1/2 7j80 7j80-1b 7j80-2b 8j80 8j80-1b 8j80-2b n80 ≥ 7 ≥ 8 nb−jet — ≥ 1 ≥ 2 — ≥ 1 ≥ 2 Emiss

T

/√HT > 4 GeV1/2

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Chris Young, CERN

ATLAS Signal Regions (for reference)

The 3 ˜ g → b¯ b ˜ χ0

1 and 3 ˜

g → t¯ t ˜ χ0

1, ≥3-b-jet search signal regions (1-lepton regions are

also used in this analysis):

Criteria common to all Gbb regions: ≥ 4 signal jets, ≥ 3 b-jets Variable Signal region Control region Validation region Criteria common to all regions of the same type Lepton Candidate veto = 1 signal Candidate veto ∆φ4j

min

> 0.4 − > 0.4 mb−jets

T,min

− − < 160 mT − < 150 − Region A (Large mass splitting) pTjet > 90 > 90 > 90 Emiss

T

> 350 > 250 > 250 m4j

eff

> 1600 > 1200 < 1400 Region B (Moderate mass splitting) pTjet > 90 > 90 > 90 Emiss

T

> 450 > 300 > 300 m4j

eff

> 1400 > 1000 < 1400 Region C (Small mass splitting) pTjet > 30 > 30 > 30 Emiss

T

> 500 > 400 > 400 m4j

eff

> 1400 > 1200 < 1400 Criteria common to all Gtt 0-lepton regions: pTjet > 30 GeV Variable Signal region Control region VR1L VR0L Criteria common to all regions of the same type Lepton 0 signal = 1 signal = 1 signal 0 signal ∆φ4j

min

> 0.4 − − > 0.4 Njet ≥ 8 ≥ 7 ≥ 7 ≥ 8 mb−jets

T,min

> 80 − > 80 < 80 mT − < 150 < 150 − Region A (Large mass splitting) Emiss

T

> 400 > 250 > 250 > 200 mincl

eff

> 1700 > 1350 > 1350 > 1400 Nb−jet ≥ 3 ≥ 3 ≥ 3 ≥ 2 Ntop ≥ 1 ≥ 1 ≥ 1 ≥ 1 Region B (Moderate mass splitting) Emiss

T

> 350 > 200 > 200 > 200 mincl

eff

> 1250 > 1000 > 1000 > 1100 Nb−jet ≥ 4 ≥ 4 ≥ 4 ≥ 3 Ntop ≥ 1 ≥ 1 ≥ 1 ≥ 1 Region C (Small mass splitting) Emiss

T

> 350 > 200 > 200 > 200 mincl

eff

> 1250 > 1000 > 1000 > 1250 Nb−jet ≥ 4 ≥ 4 ≥ 4 ≥ 3

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

ATLAS Signal Regions (for reference)

The 3 ˜ g → b¯ b ˜ χ0

1 and 3 ˜

g → t¯ t ˜ χ0

1, ≥3-b-jet search signal regions (1-lepton regions are

also used in this analysis):

Criteria common to all Gbb regions: ≥ 4 signal jets, ≥ 3 b-jets Variable Signal region Control region Validation region Criteria common to all regions of the same type Lepton Candidate veto = 1 signal Candidate veto ∆φ4j

min

> 0.4 − > 0.4 mb−jets

T,min

− − < 160 mT − < 150 − Region A (Large mass splitting) pTjet > 90 > 90 > 90 Emiss

T

> 350 > 250 > 250 m4j

eff

> 1600 > 1200 < 1400 Region B (Moderate mass splitting) pTjet > 90 > 90 > 90 Emiss

T

> 450 > 300 > 300 m4j

eff

> 1400 > 1000 < 1400 Region C (Small mass splitting) pTjet > 30 > 30 > 30 Emiss

T

> 500 > 400 > 400 m4j

eff

> 1400 > 1200 < 1400 Criteria common to all Gtt 0-lepton regions: pTjet > 30 GeV Variable Signal region Control region VR1L VR0L Criteria common to all regions of the same type Lepton 0 signal = 1 signal = 1 signal 0 signal ∆φ4j

min

> 0.4 − − > 0.4 Njet ≥ 8 ≥ 7 ≥ 7 ≥ 8 mb−jets

T,min

> 80 − > 80 < 80 mT − < 150 < 150 − Region A (Large mass splitting) Emiss

T

> 400 > 250 > 250 > 200 mincl

eff

> 1700 > 1350 > 1350 > 1400 Nb−jet ≥ 3 ≥ 3 ≥ 3 ≥ 2 Ntop ≥ 1 ≥ 1 ≥ 1 ≥ 1 Region B (Moderate mass splitting) Emiss

T

> 350 > 200 > 200 > 200 mincl

eff

> 1250 > 1000 > 1000 > 1100 Nb−jet ≥ 4 ≥ 4 ≥ 4 ≥ 3 Ntop ≥ 1 ≥ 1 ≥ 1 ≥ 1 Region C (Small mass splitting) Emiss

T

> 350 > 200 > 200 > 200 mincl

eff

> 1250 > 1000 > 1000 > 1250 Nb−jet ≥ 4 ≥ 4 ≥ 4 ≥ 3

Criteria common to all Gtt 1-lepton regions: ≥ 1 signal lepton, pTjet > 30 GeV Variable Signal region Control region VR-mT VR-mb−jets

T,min

Criteria common to all regions of the same type mT > 150 < 150 > 150 < 150 Njet ≥ 6 ≥ 6 ≥ 5 ≥ 6 Nb−jet ≥ 3 ≥ 3 = 3 = 3 Region A (Large mass splitting) Emiss

T

> 200 > 200 > 200 > 200 mincl

eff

> 1100 > 1100 > 600 > 600 mb−jets

T,min

> 160 − < 160 > 140 Ntop ≥ 1 ≥ 1 ≥ 1 ≥ 1 Region B (Moderate to small mass splitting) Emiss

T

> 300 > 300 > 200 > 200 mincl

eff

> 900 > 900 > 600 > 600 mb−jets

T,min

> 160 − < 160 > 160

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Variables used to define signal regions (CMS I)

The HT = pjet

T analysis has a similar strategy to the ATLAS 2-6 jet search but sets

up exclusive bins in HT, Hmiss

T

, Njet (4-6, 7-8, 9+), and Nb−jet (0,1,2,3+), making a total of 72 SRs. Razor variables.

◮ The objects are grouped into two hemispheres such that the sum of the masses

f the hemispheres is minimised.

◮ Then using the 4-vector (z-component) of the hemispheres, Pi (pi

z) we define;

MR =

(Pj1 + Pj2)2 − (pj1

z + pj2 z )2

MR

T =

E miss

T

(pj1

T + pj2 T )2 −

pmiss

T

.( pj1

T +

pj2

T )2

2 R2 = (MR

T /MR)2

◮ For a SUSY event MR is related to the mass scale of the particles, and R2 is

related to the E miss

T

so can be used to suppress SM backgrounds.

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Chris Young, CERN

Variables used to define signal regions (CMS II)

The αT variable is designed to kill multi-jet background events. It is defined by; αT = E j2

T /MT

where E j2

T

is the sub-leading jet energy and MT is the transverse mass of the di-jet system. After cuts on this variable and ∆φ(jet, E miss

T

) the multi-jet background is negligible.

T

α

0.5 1 1.5 2 2.5

Events / 0.05

1 10

2

10

3

10

4

10

5

10

6

10

7

10

8

10

Data Total Standard Model , residual SM t t +jets, V QCD multijet

CMS

Preliminary (13 TeV)

1

2.2 fb

The MT2 variable is defined as the analogue to the transverse mass for a system of two particles decaying to a visible and invisible particle. Experimentally it is formed by clustering the jets around the highest mass pair and using these jets and the E miss

T

. This variable provides good discrimination against the QCD and other backgrounds as well. Additionally ∆φ(jet, E miss

T

) are applied in this analysis.

[GeV]

T2

M

200 400 600 800 1000 1200 1400

Events / 50 GeV

1 10

2

10

3

10

4

10

5

10

6

10

7

10

8

10 > 200 GeV

T

H > 30 GeV

miss T

E 0b ≥ 2j, ≥ Multijet Top quark W+jets ν ν → Z

1

χ b b → g ~ , g ~ g ~ → pp = 1100 GeV

g ~

m = 100 GeV

1 χ ∼

m (13 TeV)

1

2.3 fb CMS Simulation

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

CMS Signal Regions (for reference)

The 72 signal regions of the HT based search - Njet (4-6, 7-8, 9+), and Nb−jet (0,1,2,3+) for each of;

[GeV]

T

H 600 800 1000 1200 1400 [GeV]

miss T

H 200 300 400 500 600 700 800 900

BLQ 1 BLQ 2 BLQ 3 BLQ 4 BLQ 5 BLQ 6

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

CMS Signal Regions (for reference)

Planes in the Razor variables used as signal regions. Note that both channels with and without leptons are considered.

[GeV]

R

M 600 1000 2000 3000

2

R 0.3 0.4 0.5 0.6 0.7 0.8 1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 razor MultiJet bin numbers

(GeV)

R

M 500 1000 2000 3000

2

R 0.2 0.3 0.4 0.5 0.6 1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 razor MuMultiJet and EleMultiJet bin numbers

The 30 αT signal regions:

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

CMS Signal Regions (for reference)

The 162 signal regions of the MT2 based search

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Chris Young, CERN

Estimating the W and t¯ t backgrounds (ATLAS)

◮ Backgrounds from W+jets and t¯

t enter the search regions either when either the electron or muon is missed (out of acceptance or reconstruction efficiency), or through a hadronic τ decay.

◮ This background is determined in all three searches by forming control

regions requiring an isolated electron of muon.

◮ W+jets and t¯

t are separated by requiring or vetoing a b-tagged jet.

◮ These have slightly relaxed kinematic cuts compared to the signal region. ◮ The final prediction then comes from taking the ratio between the regions

from Monte-Carlo in the combined fit of signal and control regions.

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500 events / 100 GeV 1 10

2

10 Preliminary ATLAS

1

=13 TeV, 3.2 fb s CRW for SR4jt Data 2015 SM Total Diboson Z+jets (+EW) & single top t t Multi−jet W+jets

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500 Data / MC

0.5 1 1.5 2

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500 events / 100 GeV 1 10

2

10 Preliminary ATLAS

1

=13 TeV, 3.2 fb s CRT for SR4jt Data 2015 SM Total Diboson Z+jets W+jets Multi−jet (+EW) & single top t t

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500 Data / MC

0.5 1 1.5 2

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Estimating the W and t¯ t backgrounds (CMS)

◮ CMS determine the backgrounds from missed leptons and τhad separately ◮ The missed lepton background is determined using a CR requiring a e or µ

and each event is then assigned to the signal regions assuming the lepton has been lost with the appropriate probability of it having been lost.

◮ These probabilities include the dependance on acceptance, reconstruction

and isolation ǫ and are functions of HT, Hmiss

T

, Njet, plep

T ,etc.

◮ The τhad background is determined from a control region requiring a µ. ◮ The muons are then smeared by a response function and the events

entered into the SRs. Closure of both of these methods is tested in MC.

Search region bin number

10 20 30 40 50 60 70

Events

1 −

10 1 10

2

10

3

10

4

10

6 ≤

jet

N ≤ 4 8 ≤

jet

N ≤ 7 9 ≥

jet

N

b-jet

N 1 2 3 ≥ Lost-lepton background Direct from simulation Treat simulation like data

Search region bin number

10 20 30 40 50 60 70

Prediction Direct

0.5 1 1.5

(13 TeV)

1

2.3 fb

CMS

Simulation

Search region bin number 10 20 30 40 50 60 70

Events

1 −

10 1 10

2

10

3

10

4

10

6 ≤

jet

N ≤ 4 8 ≤

jet

N ≤ 7 9 ≥

jet

N

b-jet

N 1 2 3 ≥

lepton background

τ Hadronic Direct from simulation Treat simulation like data

Search region bin number

10 20 30 40 50 60 70

Prediction Direct

0.5 1 1.5

(13 TeV)

1

2.3 fb

CMS

Simulation

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Estimating the Z→ νν background (ATLAS+CMS)

◮ Both estimate the Z→ νν background using a similar strategy. ◮ Events with similar kinematic properties to the signal region but with a

high pT photon instead of E miss

T

are selected.

◮ This process is similar to Z production other than the up/down quark

couplings and the boson mass.

◮ Overall normalisation is taken from Z → ll events. ◮ Below is the agreement in the γ control region from ATLAS and the

closure of this method in MC from CMS.

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500

events / 100 GeV

1 10

2

10

Preliminary ATLAS

1

=13 TeV, 3.2 fb s for SR4jt γ CR Data 2015 SM Total Diboson Z+jets (+EW) & single top t t W+jets +jets γ

(incl.) [GeV]

eff

m

1000 1500 2000 2500 3000 3500

Data / MC

0.5 1 1.5 2

10 20 30 40 50 60 70

Events

2 −

10

1 −

10 1 10

2

10

3

10

4

10

5

10 6 ≤

jet

N ≤ 4 8 ≤

jet

N ≤ 7 9 ≥

jet

N

b-jet

N 1 2 3 ≥

background ν ν → Z Direct from simulation Treat simulation like data

Search region bin number

10 20 30 40 50 60 70

Prediction Direct

0.5 1 1.5

(13 TeV)

1

2.3 fb

CMS

Simulation

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Estimating the Multi-jet background (ATLAS)

◮ The ATLAS ≥2-6 jet and ≥3-b-jet cut so hard on E miss

T

and the other variables eg.∆φ(jet, E miss

T

) that this background is negligible (< 0.5%).

◮ The ≥7-10 jet search cuts softly on E miss

T

/ √ HT such that this remains a major background component.

◮ This background is estimated by using a template taken from low jet

multiplicity data of the E miss

T

/ √ HT distribution.

◮ The assumption is then that this distribution is invariant under changes in

multiplicity which is shown to work at multiplicities lower than the SRs.

2 4 6 8 10 12 14 16 18 20

1/2

Events / 4 GeV 1 10

2

10

3

10

4

10

5

10

6

10 ATLAS

1 −

= 13 TeV, 3.2 fb s Data Total background Multijet (=6-jet data) ql, ll → t t + jets ν l → W Other pMSSM benchmark 2-step benchmark VRJ 7j50-0b ]

1/2

[GeV

T

H /

miss T

E 2 4 6 8 10 12 14 16 18 20 Data / Prediction 0.5 1 1.5 2 2 4 6 8 10 12 14 16 18 20

1/2

Events / 4 GeV 1 10

2

10

3

10

4

10

5

10 ATLAS

1 −

= 13 TeV, 3.2 fb s Data Total background Multijet (=5-jet data) ql, ll → t t + jets ν l → W Other pMSSM benchmark 2-step benchmark VRJ 6j80-0b ]

1/2

[GeV

T

H /

miss T

E 2 4 6 8 10 12 14 16 18 20 Data / Prediction 0.5 1 1.5 2

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Razor Search Background Estimation (CMS)

◮ The CMS Razor search uses a very different approach to the others. ◮ An empirical shape with 4 parameters is used across the R2, MR plane. ◮ Regions of low R2 or MR are used to constrain the background fit

parameters in each binned number of b-jets.

◮ The fit is tested in Monte-Carlo and is found to describe the distribution

across the plane well.

◮ A potential issue could occur if the fraction of the different backgrounds

was different in Monte-Carlo and data such that these are varied by ±30% and the fit is seen to still be able to describe the distribution.

◮ The fit is also tested in the presence of a signal to check that it wouldn’t

be unduely biased.

[GeV]

R

M 600 1000 2000 3000 4000

2

R 1 0.8 0.5 0.3

> 0.3

2

< 600 GeV and R

R

sideband: 500 < M

R

Low M < 0.3

2

> 500 GeV and 0.25 < R

R

sideband: M

2

Low R > 0.3

2

> 600 GeV and R

R

Signal-sensitive region: M

Hadronic categories

[GeV]

R

M 600 1000 2000 3000 4000

2

R 1 0.8 0.5 0.3

> 0.3

2

< 600 GeV and R

R

sideband: 500 < M

R

Low M < 0.3

2

> 500 GeV and 0.25 < R

R

sideband: M

2

Low R > 0.3

2

> 600 GeV and R

R

Signal-sensitive region: M

Hadronic categories

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Results and Statistical interpretation (ATLAS)

◮ For each of the individual search channel a simultaneous fit of the signal

region and relevant control regions is performed.

◮ These fits are not overconstrained as the number of control regions

correspond to the number of free background components (eg. t¯ t, W, Z, etc.)

◮ No significant deviation from the Standard Model is found in these fits. ◮ To set limits the fits are performed in the presence of signal (to account

for control region signal contamination).

◮ The limit contour then comes from the region with the best expected

limit for each point in the plane.

◮ This simple setup is designed for easy discovery with relatively little

“look-elsewhere” effect.

◮ Upper limits on the number of BSM events present in each signal region

are given for re-interpretation.

◮ For the ≥3-b-jet search results from the 0 and 1 lepton channels present

in the analysis are combined.

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Chris Young, CERN

Results and Statistical interpretation (CMS)

◮ Each of the CMS analyses has a large number of signal regions. ◮ No significant deviation is found across the phase space such that limits

are set.

◮ They use a fit to all regions in the presence of each signal point to

determine if it can be excluded.

◮ This utilizes the full shape information of the signal distributions to

enhance their sensitivity.

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Limits on models I

◮ Both ATLAS and CMS set limits on the same models;

˜ g → ˜ χ0

1 + q¯

q/b¯ b/t¯ t

[GeV]

g ~

m 200 400 600 800 1000 1200 1400 1600 1800 2000 [GeV]

1 χ ∼

m 200 400 600 800 1000 1200 1400

1 χ ∼

< m

g ~

m

1

χ ∼

1

χ ∼ qqqq → g ~

g

~ ATLAS Preliminary

1

= 13 TeV, 3.2 fb s

miss T

0-lepton + 2-6 jets + E All limits at 95% CL )

SUSY theory

σ 1 ± Observed limit ( )

exp

σ 1 ± Expected limit (

1

ATLAS 8 TeV, 20.3 fb [GeV] g ~ m 1000 1200 1400 1600 1800 2000 [GeV]

1 χ ∼

m 200 400 600 800 1000 1200 1400 1600

1

ATLAS 8 TeV, 20.1 fb )

exp

σ 1 ± Expected limit ( )

theory SUSY

σ 1 ± Observed limit ( b + 2m

1 χ ∼

< m

g ~

m ) g ~ ) >> m( q ~ , m(

1

χ ∼ + b b → g ~ production, g ~ g ~ All limits at 95% CL

Preliminary ATLAS

1

=13 TeV, 3.3 fb s

1

ATLAS 8 TeV, 20.1 fb )

exp

σ 1 ± Expected limit ( )

theory SUSY

σ 1 ± Observed limit ( [GeV] g ~ m 1000 1200 1400 1600 1800 2000 [GeV]

1 χ ∼

m 200 400 600 800 1000 1200 1400 1600

1

ATLAS 8 TeV, 20.1 fb )

exp

σ 1 ± Expected limit ( )

theory SUSY

σ 1 ± Observed limit ( t + 2m

1 χ ∼

< m

g ~

m ) g ~ ) >> m( q ~ , m(

1

χ ∼ + t t → g ~ production, g ~ g ~ All limits at 95% CL

Preliminary ATLAS

1

=13 TeV, 3.3 fb s

1

ATLAS 8 TeV, 20.1 fb )

exp

σ 1 ± Expected limit ( )

theory SUSY

σ 1 ± Observed limit (

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0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Limits on models I

◮ Both ATLAS and CMS set limits on the same models;

˜ g → ˜ χ0

1 + q¯

q/b¯ b/t¯ t

[GeV]

g ~

m 200 400 600 800 1000 1200 1400 1600 1800 2000 [GeV]

1 χ ∼

m 200 400 600 800 1000 1200 1400

1 χ ∼

< m

g ~

m

1

χ ∼

1

χ ∼ qqqq → g ~

g

~ ATLAS Preliminary

1

= 13 TeV, 3.2 fb s

miss T

0-lepton + 2-6 jets + E All limits at 95% CL )

SUSY theory

σ 1 ± Observed limit ( )

exp

σ 1 ± Expected limit (

1

ATLAS 8 TeV, 20.3 fb [GeV] g ~ m 1000 1200 1400 1600 1800 2000 [GeV]

1 χ ∼

m 200 400 600 800 1000 1200 1400 1600

1

ATLAS 8 TeV, 20.1 fb )

exp

σ 1 ± Expected limit ( )

theory SUSY

σ 1 ± Observed limit ( b + 2m

1 χ ∼

< m

g ~

m ) g ~ ) >> m( q ~ , m(

1

χ ∼ + b b → g ~ production, g ~ g ~ All limits at 95% CL

Preliminary ATLAS

1

=13 TeV, 3.3 fb s

1

ATLAS 8 TeV, 20.1 fb )

exp

σ 1 ± Expected limit ( )

theory SUSY

σ 1 ± Observed limit (

NEW

22 / 63

SLIDE 23

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Limits on models II

◮ Additionally both collaborations have looked at additional models;

[GeV]

q ~

m 200 400 600 800 1000 1200 1400 [GeV]

1 χ ∼

m 200 400 600 800 1000 1200

1 χ ∼

< m

q ~

m

1

χ ∼

1

χ ∼ qq → q ~

q

~ ATLAS Preliminary

1

= 13 TeV, 3.2 fb s

miss T

0-lepton + 2-6 jets + E All limits at 95% CL )

SUSY theory

σ 1 ± Observed limit ( )

exp

σ 1 ± Expected limit (

1

ATLAS 8 TeV, 20.3 fb [GeV] g ~ m 400 600 800 1000 1200 1400 1600 1800 2000 [GeV]

1 χ ∼

m 200 400 600 800 1000 1200 1400

1 χ ∼

< m

g ~

m ))/2

1

χ ∼ )+m( g ~ )=(m(

± 1

χ ∼ , m(

1

χ ∼

1

χ ∼ qqqqWW → g ~

g

~ ATLAS Preliminary

1

= 13 TeV, 3.2 fb s

miss T

0-lepton + 2-6 jets + E All limits at 95% CL )

SUSY theory

σ 1 ± Observed limit ( )

exp

σ 1 ± Expected limit (

1

ATLAS 8 TeV, 20.3 fb

) [GeV] g ~ m(

800 900 1000 1100 1200 1300 1400 1500 1600 1700

) [GeV]

1

χ ∼ m(

100 200 300 400 500 600 700 800 )]/2

1

χ ∼ )+m(

± 1

χ ∼ )=[m(

2

χ ∼ )]/2, m(

1

χ ∼ )+m( g ~ )=[m(

± 1

χ ∼ ; m(

1

χ ∼ qqWZ → g ~ , g ~

g

~

ATLAS

Combined

miss T

Multijets + E

1 −

=13 TeV, 3.2 fb s All limits 95% CL )

exp

σ 1 ± Expected ( )

theory SUSY

σ 1 ± Observed (

1 −

ATLAS 8 TeV, 20.3 fb

[GeV]

q ~

m

400 600 800 1000 1200 1400

[GeV]

1

χ ∼

m

200 400 600 800 1000 1200

3 −

10

2 −

10

1 −

10 1

(13 TeV)

1

2.3 fb

CMS Preliminary

NLO+NLL exclusion

1

χ ∼ q → q ~ *, q ~ q ~ → pp ) c ~ , s ~ , d ~ , u ~ (

R

q ~ +

L

q ~ q ~

ne light

theory

σ 1 ± Observed

experiment

σ 1 ± Expected

95% CL upper limit on cross section [pb]

NEW NEW

[GeV]

g ~

m

600 800 1000 1200 1400 1600 1800

[GeV]

1

χ ∼

m

200 400 600 800 1000 1200 1400 1600 1800 (13 TeV)

1

CMS preliminary 2.3 fb 95% C.L. NLO+NLL exclusion g ~ g ~ → pp

= 5 GeV

1 χ ∼

m

1 ± χ ∼

m

1

χ ∼ b b → g ~ 100%

1

χ ∼ bb → g ~ , 50%

1 ±

χ ∼ tb → g ~ 50%

1 ±

χ ∼ tb → g ~ 100%

1

χ ∼ bb → g ~ , 25%

1

χ ∼ tt → g ~ , 25%

1 ±

χ ∼ tb → g ~ 50%

1

χ ∼ tt → g ~ , 50%

1 ±

χ ∼ tb → g ~ 50%

1

χ ∼ t t → g ~ 100% Observed Expected

NEW

23 / 63

SLIDE 24

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Conclusions

◮ There has been a significant effort to find the ˜

g in the 2015 13 TeV data by both ATLAS and CMS.

◮ Unfortunately no evidence for such particles has been found. ◮ Limits have been set in various models (more than I have been able to

show today).

◮ Much more documentation of these searches appears on the ATLAS and

CMS public webpages.

◮ The upcoming 2016 data will offer new opportunities for the discovery of

Supersymmetry!

◮ Fingers crossed nature is kind to us and the Supersymmetry is just

around the corner...

24 / 63

SLIDE 25

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Back-Up

25 / 63

SLIDE 26

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

ATLAS ≥2-6 jet + E miss

T

Search

26 / 63

SLIDE 27

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

The Control Regions

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500

events / 100 GeV

1 10

2

10

Preliminary ATLAS

1

=13 TeV, 3.2 fb s for SR4jt γ CR Data 2015 SM Total Diboson Z+jets (+EW) & single top t t W+jets +jets γ

(incl.) [GeV]

eff

m

1000 1500 2000 2500 3000 3500

Data / MC

0.5 1 1.5 2

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500

events / 100 GeV

1 10

2

10

Preliminary ATLAS

1

=13 TeV, 3.2 fb s CRW for SR4jt Data 2015 SM Total Diboson Z+jets (+EW) & single top t t Multi−jet W+jets

(incl.) [GeV]

eff

m

1000 1500 2000 2500 3000 3500

Data / MC

0.5 1 1.5 2

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500

events / 100 GeV

1 10

2

10

Preliminary ATLAS

1

=13 TeV, 3.2 fb s CRT for SR4jt Data 2015 SM Total Diboson Z+jets W+jets Multi−jet (+EW) & single top t t

(incl.) [GeV]

eff

m

1000 1500 2000 2500 3000 3500

Data / MC

0.5 1 1.5 2

27 / 63

SLIDE 28

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

The Signal Regions

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500

events / 100 GeV

1 10

2

10

Preliminary ATLAS

1

=13 TeV, 3.2 fb s SR2jl Data 2015 SM Total Diboson Z+jets (+EW) & single top t t W+jets Multi−jet direct, q ~ q ~ )=(800, 400)

1

χ ∼ , q ~ m(

(incl.) [GeV]

eff

m

1000 1500 2000 2500 3000 3500

Data / MC

0.5 1 1.5 2

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500

events / 100 GeV

1 10

2

10

3

10

Preliminary ATLAS

1

=13 TeV, 3.2 fb s SR2jm Data 2015 SM Total Diboson Z+jets (+EW) & single top t t W+jets Multi−jet direct, g ~ g ~ )=(750, 650)

1

χ ∼ , g ~ m(

(incl.) [GeV]

eff

m

1000 1500 2000 2500 3000 3500

Data / MC

0.5 1 1.5 2

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500

events / 100 GeV

1 10

2

10

Preliminary ATLAS

1

=13 TeV, 3.2 fb s SR2jt Data 2015 SM Total Diboson Z+jets (+EW) & single top t t W+jets Multi−jet direct, q ~ q ~ )=(1200, 0)

1

χ ∼ , q ~ m(

(incl.) [GeV]

eff

m

1000 1500 2000 2500 3000 3500

Data / MC

0.5 1 1.5 2

28 / 63

SLIDE 29

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

The Signal Regions

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500

events / 100 GeV

1 10

2

10

Preliminary ATLAS

1

=13 TeV, 3.2 fb s SR4jt Data 2015 SM Total Diboson Z+jets (+EW) & single top t t W+jets Multi−jet direct, g ~ g ~ )=(1400, 0)

1

χ ∼ , g ~ m(

(incl.) [GeV]

eff

m

1000 1500 2000 2500 3000 3500

Data / MC

0.5 1 1.5 2

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500

events / 100 GeV

1 10

Preliminary ATLAS

1

=13 TeV, 3.2 fb s SR5j Data 2015 SM Total Diboson Z+jets (+EW) & single top t t W+jets Multi−jet

nestep,

g ~ g ~ )=(1265, 945, 625)

1

χ ∼ ,

± 1

χ ∼ , g ~ m(

(incl.) [GeV]

eff

m

1000 1500 2000 2500 3000 3500

Data / MC

0.5 1 1.5 2

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500

events / 100 GeV

1 10

Preliminary ATLAS

1

=13 TeV, 3.2 fb s SR6jm Data 2015 SM Total Diboson Z+jets (+EW) & single top t t W+jets Multi−jet

nestep,

g ~ g ~ )=(1265, 945, 625)

1

χ ∼ ,

± 1

χ ∼ , g ~ m(

(incl.) [GeV] m

1000 1500 2000 2500 3000 3500

Data / MC

0.5 1 1.5 2

(incl.) [GeV]

eff

m 1000 1500 2000 2500 3000 3500

events / 100 GeV

1 10

Preliminary ATLAS

1

=13 TeV, 3.2 fb s SR6jt Data 2015 SM Total Diboson Z+jets (+EW) & single top t t W+jets Multi−jet

nestep,

g ~ g ~ )=(1385, 705, 25)

1

χ ∼ ,

± 1

χ ∼ , g ~ m(

(incl.) [GeV] m

1000 1500 2000 2500 3000 3500

Data / MC

0.5 1 1.5 2

29 / 63

SLIDE 30

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

The Signal Regions

Number of events 1 10

2

10 Data 2015 SM Total Multi−jet W+jets (+EW) & single top t t Z+jets Diboson Preliminary ATLAS

1

=13TeV, 3.2 fb s Signal Region

2jl 2jm 2jt 4jt 5j 6jm 6jt Data/Bkg 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8

30 / 63

SLIDE 31

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

The Limit Plots

[GeV]

q ~

m 200 400 600 800 1000 1200 1400 [GeV]

1 χ ∼

m 200 400 600 800 1000 1200

1 χ ∼

< m

q ~

m

1

χ ∼

1

χ ∼ qq → q ~

q

~ ATLAS Preliminary

1

= 13 TeV, 3.2 fb s

miss T

0-lepton + 2-6 jets + E All limits at 95% CL )

SUSY theory

σ 1 ± Observed limit ( )

exp

σ 1 ± Expected limit (

1

ATLAS 8 TeV, 20.3 fb [GeV] g ~ m 200 400 600 800 1000 1200 1400 1600 1800 2000 [GeV]

1 χ ∼

m 200 400 600 800 1000 1200 1400

1 χ ∼

< m

g ~

m

1

χ ∼

1

χ ∼ qqqq → g ~

g

~ ATLAS Preliminary

1

= 13 TeV, 3.2 fb s

miss T

0-lepton + 2-6 jets + E All limits at 95% CL )

SUSY theory

σ 1 ± Observed limit ( )

exp

σ 1 ± Expected limit (

1

ATLAS 8 TeV, 20.3 fb [GeV] g ~ m 400 600 800 1000 1200 1400 1600 1800 2000 [GeV]

1 χ ∼

m 200 400 600 800 1000 1200 1400

1 χ ∼

< m

g ~

m ))/2

1

χ ∼ )+m( g ~ )=(m(

± 1

χ ∼ , m(

1

χ ∼

1

χ ∼ qqqqWW → g ~

g

~ ATLAS Preliminary

1

= 13 TeV, 3.2 fb s

miss T

0-lepton + 2-6 jets + E All limits at 95% CL )

SUSY theory

σ 1 ± Observed limit ( )

exp

σ 1 ± Expected limit (

1

ATLAS 8 TeV, 20.3 fb

31 / 63

SLIDE 32

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

ATLAS ≥7-10 jet + E miss

T

Search

32 / 63

SLIDE 33

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

The Signal and Control Regions

8j50 8j50-1b 8j50-2b 9j50 9j50-1b 9j50-2b 10j50 10j50-1b 10j50-2b n50 ≥ 8 ≥ 9 ≥ 10 nb−jet — ≥ 1 ≥ 2 — ≥ 1 ≥ 2 — ≥ 1 ≥ 2 Emiss

T

/√HT > 4 GeV1/2 7j80 7j80-1b 7j80-2b 8j80 8j80-1b 8j80-2b n80 ≥ 7 ≥ 8 nb−jet — ≥ 1 ≥ 2 — ≥ 1 ≥ 2 Emiss

T

/√HT > 4 GeV1/2

SR name nj50 or nj50-1b or nj50-2b nj80 or nj80-1b or nj80-2b CR name CR(n − 1)j50-0b CR(n − 1)j50-1b CR(n − 1)j80-0b CR(n − 1)j80-1b pℓ

T (ℓ ∈ {e µ})

> 20 GeV mT < 120 GeV Emiss

T

/√HT > 3 GeV1/2 nCR

50

≥ n50 − 1 — nCR

80

— ≥ n80 − 1 nb−jet ≥ 1 ≥ 1

33 / 63

SLIDE 34

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Control Region Distributions

Events / Bin

1

10 1 10

2

10

3

10 Data Total background ql, ll → t t + jets ν l → W Other pMSSM benchmark 2-step benchmark ATLAS

1 −

= 13 TeV, 3.2 fb s CR 7j50-0b

| < 2.0 η > 50 GeV and |

T

Number of jets (plus lepton) with p 7 8 9 10 11 12 13 Data / Prediction 0.5 1 1.5 2 Events / Bin

1

10 1 10

2

10

3

10 Data Total background ql, ll → t t + jets ν l → W Other pMSSM benchmark 2-step benchmark ATLAS

1 −

= 13 TeV, 3.2 fb s CR 7j50-1b

| < 2.0 η > 50 GeV and |

T

Number of jets (plus lepton) with p 7 8 9 10 11 12 13 Data / Prediction 0.5 1 1.5 2

34 / 63

SLIDE 35

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Signal Region Backgrounds

0 b-jets ≥ 1 b-jet ≥ 2 b-jets ≥ SR 8 jets ≥ SR 9 jets ≥ SR 10 jets ≥ 0.9 ± 4.6 0.8 ± 3.9 0.9 ± 2.2 6 ± 30 5 ± 24 4 ± 12 26 ± 189 21 ± 138 13 ± 67 ATLAS

1 −

= 13 TeV, 3.2 fb s

Multijet (=6-jet data) t t Single Top + jets ν l → W , ll + jets ν ν → Z diboson +X t t 0 b-jets ≥ 1 b-jet ≥ 2 b-jets ≥ SR 7 jets ≥ SR 8 jets ≥ 2.9 ± 9.3 2.6 ± 7.6 1.5 ± 4.1 14 ± 70 11 ± 50 5 ± 23

ATLAS

1 −

= 13 TeV, 3.2 fb s

Multijet (=5-jet data) t t Single Top + jets ν l → W , ll + jets ν ν → Z diboson +X t t

35 / 63

SLIDE 36

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Signal Region Distributions

2 4 6 8 10 12 14 16 18 20

1/2

Events / 4 GeV

1

10 1 10

2

10

3

10 ATLAS

1 −

= 13 TeV, 3.2 fb s Data Total background Multijet (=6-jet data) ql, ll → t t + jets ν l → W Other pMSSM benchmark 2-step benchmark SR 10j50-0b ]

1/2

[GeV

T

H /

miss T

E 2 4 6 8 10 12 14 16 18 20 Data / Prediction 0.5 1 1.5 2 2 4 6 8 10 12 14 16 18 20

1/2

Events / 4 GeV

1

10 1 10

2

10

3

10 ATLAS

1 −

= 13 TeV, 3.2 fb s Data Total background Multijet (=6-jet data) ql, ll → t t + jets ν l → W Other pMSSM benchmark 2-step benchmark SR 10j50-2b ]

1/2

[GeV

T

H /

miss T

E 2 4 6 8 10 12 14 16 18 20 Data / Prediction 0.5 1 1.5 2

1/2

Events / 4 GeV

1

10 1 10

2

10

3

10

4

10 ATLAS

1 −

= 13 TeV, 3.2 fb s Data Total background Multijet (=5-jet data) ql, ll → t t + jets ν l → W Other pMSSM benchmark 2-step benchmark SR 8j80-0b ]

1/2

[GeV

T

H /

miss T

E 2 4 6 8 10 12 14 16 18 20 Data / Prediction 0.5 1 1.5 2

1/2

Events / 4 GeV

1

10 1 10

2

10

3

10 ATLAS

1 −

= 13 TeV, 3.2 fb s Data Total background Multijet (=5-jet data) ql, ll → t t + jets ν l → W Other pMSSM benchmark 2-step benchmark SR 8j80-2b ]

1/2

[GeV

T

H /

miss T

E 2 4 6 8 10 12 14 16 18 20 Data / Prediction 0.5 1 1.5 2

36 / 63

SLIDE 37

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Signal Region Table

Signal region

Fitted background Obs events Multijet Leptonic Total

8j50

109.3 ± 6.9 80 ± 25 189 ± 26 157

8j50-1b

76.7 ± 2.7 62 ± 21 138 ± 21 97

8j50-2b

33.8 ± 2.1 33 ± 13 67 ± 13 39

9j50

16.8 ± 1.3 12.8 ± 5.4 29.6 ± 5.6 29

9j50-1b

13.5 ± 2.0 10.2 ± 4.9 23.8 ± 5.3 21

9j50-2b

6.4 ± 1.6 5.8 ± 3.3 12.1 ± 3.6 9

10j50

2.61 ± 0.61 1.99 ± 0.62 4.60 ± 0.87 6

10j50-1b

2.42 ± 0.62 1.44 ± 0.49 3.86 ± 0.79 3

10j50-2b

1.40 ± 0.87 0.83 ± 0.37 2.23 ± 0.94 1

7j80

40.0 ± 5.3 30 ± 13 70 ± 14 70

7j80-1b

29.1 ± 3.4 20.8 ± 10 50 ± 11 42

7j80-2b

11.5 ± 1.6 11.0 ± 5.0 22.5 ± 5.2 19

8j80

4.5 ± 1.9 4.9 ± 2.2 9.3 ± 2.9 8

8j80-1b

3.9 ± 1.5 3.8 ± 2.1 7.6 ± 2.6 4

8j80-2b

1.72 ± 0.93 2.3 ± 1.1 4.1 ± 1.5 2

37 / 63

SLIDE 38

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Limit Plots

) [GeV] g ~ m(

900 1000 1100 1200 1300 1400 1500 1600 1700

) [GeV]

± 1

χ ∼ m(

200 300 400 500 600 700 800 5 TeV ≈ ) l ~ 5 TeV, m( ≈ ) q ~ =3 TeV, m(

2

<0, M µ =10, β =60 GeV, tan

1

pMSSM: M

ATLAS

Combined

miss T

Multijets + E

1 −

=13 TeV, 3.2 fb s All limits 95% CL )

exp

σ 1 ± Expected ( )

theory SUSY

σ 1 ± Observed (

) [GeV] g ~ m(

800 900 1000 1100 1200 1300 1400 1500 1600 1700

) [GeV]

1

χ ∼ m(

100 200 300 400 500 600 700 800 )]/2

1

χ ∼ )+m(

± 1

χ ∼ )=[m(

2

χ ∼ )]/2, m(

1

χ ∼ )+m( g ~ )=[m(

± 1

χ ∼ ; m(

1

χ ∼ qqWZ → g ~ , g ~

g

~

ATLAS

Combined

miss T

Multijets + E

1 −

=13 TeV, 3.2 fb s All limits 95% CL )

exp

σ 1 ± Expected ( )

theory SUSY

σ 1 ± Observed (

1 −

ATLAS 8 TeV, 20.3 fb

38 / 63

SLIDE 39

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

ATLAS ≥3 b-jet + E miss

T

Search

39 / 63

SLIDE 40

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Control Region Distributions

Events 1 10

2

10

3

10

4

10

5

10

6

10 ATLAS Preliminary

1

= 13 TeV, 3.3 fb s Gbb pre-selection Data 2015 Total background t t Single top + W/Z/h t t Z+jets W+jets Diboson 100) × σ = 1700, 200 (

1 χ ∼

, m

g ~

Gbb: m 100) × σ = 1400, 800 (

1 χ ∼

, m

g ~

Gbb: m

> 30 GeV

T

Number of b-jets with p 3 4 5 6 7 Data / SM 1 2 Events / 50 GeV 1 10

2

10

3

10

4

10

5

10 ATLAS Preliminary

1

= 13 TeV, 3.3 fb s Gbb pre-selection Data 2015 Total background t t Single top + W/Z/h t t Z+jets W+jets Diboson 100) × σ = 1700, 200 (

1 χ ∼

, m

g ~

Gbb: m 100) × σ = 1400, 800 (

1 χ ∼

, m

g ~

Gbb: m

[GeV]

miss T

E 200 300 400 500 600 700 800 Data / SM 1 2 Events / 25 GeV 1 10

2

10

3

10

4

10

5

10 ATLAS Preliminary

1

= 13 TeV, 3.3 fb s Gtt 0-lepton pre-selection Data 2015 Total background t t Single top + W/Z/h t t Z+jets W+jets Diboson 100) × σ = 1600, 200 (

1 χ ∼

, m

g ~

Gtt: m 100) × σ = 1400, 800 (

1 χ ∼

, m

g ~

Gtt: m ) [GeV] miss T (b-jets,E min T m

50 100 150 200 250 300 350 400 Data / SM 1 2 Events 1 10

2

10

3

10

4

10

5

10

6

10 ATLAS Preliminary

1

= 13 TeV, 3.3 fb s Gtt 0-lepton pre-selection Data 2015 Total background t t Single top + W/Z/h t t Z+jets W+jets Diboson 100) × σ = 1600, 200 (

1 χ ∼

, m

g ~

Gtt: m 100) × σ = 1400, 800 (

1 χ ∼

, m

g ~

Gtt: m

Number of top-tagged jets 1 2 3 4 Data / SM 1 2 Events / 25 GeV 1 10

2

10

3

10

4

10

5

10 ATLAS Preliminary

1

= 13 TeV, 3.3 fb s Gtt 1-lepton pre-selection Data 2015 Total background t t Single top + W/Z/h t t Z+jets W+jets Diboson 100) × σ = 1600, 200 (

1 χ ∼

, m

g ~

Gtt: m 100) × σ = 1400, 800 (

1 χ ∼

, m

g ~

Gtt: m

) [GeV]

miss T

(lepton,E

T

m 50 100 150 200 250 300 350 400 Data / SM 1 2 Events / 200 GeV 1 10

2

10

3

10

4

10

5

10 ATLAS Preliminary

1

= 13 TeV, 3.3 fb s Gtt 1-lepton pre-selection Data 2015 Total background t t Single top + W/Z/h t t Z+jets W+jets Diboson 100) × σ = 1600, 200 (

1 χ ∼

, m

g ~

Gtt: m 100) × σ = 1400, 800 (

1 χ ∼

, m

g ~

Gtt: m

[GeV]

incl eff

m 500 1000 1500 2000 2500 3000 Data / SM 1 2

40 / 63

SLIDE 41

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Signal Regions

VR_Gbb_A VR_Gbb_B VR_Gbb_C VR1_Gtt_0l_A VR2_Gtt_0l_A VR1_Gtt_0l_B VR2_Gtt_0l_B VR1_Gtt_0l_C VR2_Gtt_0l_C VR2_Gtt_1l_A VR4_Gtt_1l_A VR2_Gtt_1l_B VR4_Gtt_1l_B

Events

10 20 30 40 50 60 70

Data 2015 Total background t t Single top + W/Z/h t t Z+jets W+jets Diboson

1

=13 TeV, 3.3 fb s

Preliminary ATLAS

V R

G

b b

A

V R

G

b b

B

V R

G

b b

C

V R 1 L

G

t t

L
A

V R L

G

t t

L
A

V R 1 L

G

t t

L
B

V R L

G

t t

L
B

V R 1 L

G

t t

L
C

V R L

G

t t

L
C
G

t t

1

L

A

T

V R

m
G

t t

1

L

A

b-jets T,min

V R

m
G

t t

1

L

B

T

V R

m
G

t t

1

L

B

b-jets T,min

V R

m

tot

σ ) /

pred

n
bs

(n 2 − 2

41 / 63

SLIDE 42

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Signal Region Distributions

[GeV]

miss T

E

200 300 400 500 600 700 800

Events/ 50 GeV

1 2 3 4 5 6 7 ATLAS Preliminary

1

= 13 TeV, 3.3 fb s SR-Gbb-B Data 2015 Total background t t Single top + W/Z/h t t Z+jets W+jets Diboson = 1700, 200

1 χ ∼

, m

g ~

Gbb: m = 1400, 800

1 χ ∼

, m

g ~

Gbb: m

SR

[GeV]

miss T

E

200 300 400 500 600 700 800

Events/ 50 GeV

1 2 3 4 5 6 7 8 ATLAS Preliminary

1

= 13 TeV, 3.3 fb s SR-Gtt-0L-C Data 2015 Total background t t Single top + W/Z/h t t Z+jets W+jets Diboson = 1600, 200

1 χ ∼

, m

g ~

Gtt: m = 1400, 800

1 χ ∼

, m

g ~

Gtt: m

SR

[GeV]

miss T

E

200 300 400 500 600 700 800

Events/ 50 GeV

0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 ATLAS Preliminary

1

= 13 TeV, 3.3 fb s SR-Gtt-1L-A Data 2015 Total background t t Single top + W/Z/h t t Z+jets W+jets Diboson = 1600, 200

1 χ ∼

, m

g ~

Gtt: m = 1400, 800

1 χ ∼

, m

g ~

Gtt: m

42 / 63

SLIDE 43

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

CMS HT and Hmiss

T

Search

43 / 63

SLIDE 44

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Closure Tests

Search region bin number

10 20 30 40 50 60 70

Events

1 −

10 1 10

2

10

3

10

4

10

6 ≤

jet

N ≤ 4 8 ≤

jet

N ≤ 7 9 ≥

jet

N

b-jet

N 1 2 3 ≥ Lost-lepton background Direct from simulation Treat simulation like data

Search region bin number

10 20 30 40 50 60 70

Prediction Direct

0.5 1 1.5

(13 TeV)

1

2.3 fb

CMS

Simulation

Search region bin number 10 20 30 40 50 60 70

Events

1 −

10 1 10

2

10

3

10

4

10

6 ≤

jet

N ≤ 4 8 ≤

jet

N ≤ 7 9 ≥

jet

N

b-jet

N 1 2 3 ≥

lepton background

τ Hadronic Direct from simulation Treat simulation like data

Search region bin number

10 20 30 40 50 60 70

Prediction Direct

0.5 1 1.5

(13 TeV)

1

2.3 fb

CMS

Simulation

10 20 30 40 50 60 70 Events

2 −

10

1 −

10 1 10

2

10

3

10

4

10

5

10 6 ≤

jet

N ≤ 4 8 ≤

jet

N ≤ 7 9 ≥

jet

N

b-jet

N 1 2 3 ≥ background ν ν → Z Direct from simulation Treat simulation like data

Search region bin number

10 20 30 40 50 60 70

Prediction Direct

0.5 1 1.5

(13 TeV)

1

2.3 fb

CMS

Simulation

10 20 30 40 50 60 70

1 −

10 1 10

2

10

3

10

4

10

6 ≤

jet

N ≤ 4 8 ≤

jet

N ≤ 7 9 ≥

jet

N

b-jet

N 1 2 3 ≥ QCD multijet background Direct from simulation Treat simulation like data

Search region bin number

10 20 30 40 50 60 70

Prediction Direct

1 2 3 4

(13 TeV)

1

2.3 fb

CMS

Simulation

44 / 63

SLIDE 45

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Signal Regions

Search Bin

Events

1 −

10 1 10

2

10

3

10

4

10

5

10

6 ≤

jet

N ≤ 4 8 ≤

jet

N ≤ 7 9 ≥

jet

N

b-jet

N 1 2 3 ≥

Data lepton Lost lepton τ Hadronic ν ν → Z QCD

Search region bin number 10 20 30 40 50 60 70

Exp. (Obs.-Exp.) 2 − 1 − 1 2

(13 TeV)

1

2.3 fb

CMS 45 / 63

SLIDE 46

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Signal Region Distributions

Events 10 20 30 40 50 60 70 80

Data lepton Lost lepton τ Hadronic ν ν → Z QCD = 50 GeV)

1 χ ∼

= 1400 GeV, m

g ~

(m

1

χ ∼ b b → g ~ , g ~ g ~ → pp = 700 GeV)

1 χ ∼

= 900 GeV, m

g ~

(m

1

χ ∼ b b → g ~ , g ~ g ~ → pp

3 ≥

b-jet

N [GeV]

miss T

H 200 300 400 500 600 700 800 900 1000

Exp. (Obs.-Exp.) 1 − 0.5 − 0.5 1

(13 TeV)

1

2.3 fb

CMS

Events 5 10 15 20 25 30

Data lepton Lost lepton τ Hadronic ν ν → Z QCD = 50 GeV)

1 χ ∼

= 1350 GeV, m

g ~

(m

1

χ ∼ t t → g ~ , g ~ g ~ → pp = 600 GeV)

1 χ ∼

= 1025 GeV, m

g ~

(m

1

χ ∼ t t → g ~ , g ~ g ~ → pp

2 ≥

b-jet

9, N ≥

jet

N [GeV]

miss T

H 200 300 400 500 600 700 800 900 1000

Exp. (Obs.-Exp.) 1 − 0.5 − 0.5 1

(13 TeV)

1

2.3 fb

CMS

Events 10 20 30 40 50 60

Data lepton Lost lepton τ Hadronic ν ν → Z QCD = 250 GeV)

1 χ ∼

= 1300 GeV, m

g ~

(m

1

χ ∼ q q → g ~ , g ~ g ~ → pp = 600 GeV)

1 χ ∼

= 750 GeV, m

g ~

(m

1

χ ∼ q q → g ~ , g ~ g ~ → pp

> 500 GeV

miss T

= 0, H

b-jet

6, N ≥

jet

N [GeV]

T

H 600 800 1000 1200 1400 1600

Exp. (Obs.-Exp.) 1 − 0.5 − 0.5 1

(13 TeV)

1

2.3 fb

CMS

Events 5 10 15 20 25 30 35

Data lepton Lost lepton τ Hadronic ν ν → Z QCD = 50 GeV)

1 χ ∼

= 1300 GeV, m

g ~

(m

1

χ ∼ V q q → g ~ , g ~ g ~ → pp = 600 GeV)

1 χ ∼

= 750 GeV, m

g ~

(m

1

χ ∼ V q q → g ~ , g ~ g ~ → pp

> 500 GeV

miss T

= 0, H

b-jet

7, N ≥

jet

N [GeV]

T

H 600 800 1000 1200 1400 1600

Exp. (Obs.-Exp.) 1 − 0.5 − 0.5 1

(13 TeV)

1

2.3 fb

CMS

46 / 63

SLIDE 47

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Limit Plots

N E W

47 / 63

SLIDE 48

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

CMS MT2 based Search

48 / 63

SLIDE 49

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Signal Regions

49 / 63

SLIDE 50

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Signal Regions

50 / 63

SLIDE 51

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Signal Regions

51 / 63

SLIDE 52

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Limit Plots

[GeV]

g ~

m

600 800 1000 1200 1400 1600 1800

[GeV]

1

χ ∼

m

200 400 600 800 1000 1200 1400 1600 1800

3

10

2

10

1

10 1

(13 TeV)

1

2.2 fb

CMS

Preliminary NLO+NLL exclusion

1

χ ∼ b b → g ~ , g ~ g ~ → pp

theory

σ 1 ± Observed

experiment

σ 1 ± Expected

95% C.L. upper limit on cross section [pb]

[GeV]

g ~

m

800 1000 1200 1400 1600 1800

[GeV]

1

χ ∼

m

200 400 600 800 1000 1200 1400 1600 1800

3

10

2

10

1

10 1

(13 TeV)

1

2.2 fb

CMS

Preliminary NLO+NLL exclusion

1

χ ∼ t t → g ~ , g ~ g ~ → pp

theory

σ 1 ± Observed

experiment

σ 1 ± Expected

95% C.L. upper limit on cross section [pb]

[GeV]

g ~

m

600 800 1000 1200 1400 1600 1800

[GeV]

1

χ ∼

m

200 400 600 800 1000 1200 1400 1600

3

10

2

10

1

10 1

(13 TeV)

1

2.2 fb

CMS

Preliminary NLO+NLL exclusion

1

χ ∼ q q → g ~ , g ~ g ~ → pp

theory

σ 1 ± Observed

experiment

σ 1 ± Expected

95% C.L. upper limit on cross section [pb]

52 / 63

SLIDE 53

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

CMS αT based Search

53 / 63

SLIDE 54

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Variables Used

T

α

0.5 1 1.5 2 2.5

Events / 0.05

1 10

2

10

3

10

4

10

5

10

6

10

7

10

8

10

Data Total Standard Model , residual SM t t +jets, V QCD multijet

CMS

Preliminary (13 TeV)

1

2.2 fb

* φ ∆

0.5 1 1.5 2 2.5 3

Events / 0.1

1 10

2

10

3

10

4

10

Data Total Standard Model , residual SM t t +jets, V QCD multijet

CMS

Preliminary (13 TeV)

1

2.2 fb

54 / 63

SLIDE 55

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Signal Region Distributions

Events

2

10

1

10 1 10

2

10

3

10 Data prefit background prefit background unc. T1bbbb (1500,100) > 800 GeV

T

3, H ≥

b

5, n ≥

jet

n

(13 TeV)

1

2.2 fb

CMS Preliminary

(GeV)

miss T

H

150 200 250 300 350 400 450 500 550 600

(data-pred)/pred

3
2.4
1.8
1.2
0.6

0.6 1.2 1.8 2.4 3

Events

2

10

1

10 1 10

2

10

3

10

4

10 Data prefit background prefit background unc. T1bbbb (1000,700) < 800 GeV

T

= 2, 600 < H

b

5, n ≥

jet

n

(13 TeV)

1

2.2 fb

CMS Preliminary

(GeV)

miss T

H

150 200 250 300 350 400 450 500 550

(data-pred)/pred

3
2.4
1.8
1.2
0.6

0.6 1.2 1.8 2.4 3

55 / 63

SLIDE 56

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Limit Plots

[GeV]

g ~

m

600 800 1000 1200 1400 1600 1800

[GeV]

1

χ ∼

m

200 400 600 800 1000 1200 1400 1600 1800

3

10

2

10

1

10 1

(13 TeV)

1

2.2 fb

CMS

Preliminary NLO+NLL exclusion

1

χ ∼ b b → g ~ , g ~ g ~ → pp

theory

σ 1 ± Observed

experiment

σ 1 ± Expected

95% C.L. upper limit on cross section [pb]

[GeV]

g ~

m

600 800 1000 1200 1400 1600 1800

[GeV]

1

χ ∼

m

200 400 600 800 1000 1200 1400 1600

3

10

2

10

1

10 1

(13 TeV)

1

2.2 fb

CMS

Preliminary NLO+NLL exclusion

1

χ ∼ q q → g ~ , g ~ g ~ → pp

theory

σ 1 ± Observed

experiment

σ 1 ± Expected

95% C.L. upper limit on cross section [pb]

56 / 63

SLIDE 57

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

CMS Razor variables based Search

57 / 63

SLIDE 58

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Signal Injection Study

[GeV]

R

M 500 1000 1500 2000 2500 3000 3500 4000

2

R 0.4 0.6 0.8 1 1.2 1.4

Sim. Data

2 −

10

1 −

10 1 10

CMS simulation (13 TeV)

1

2.1 fb razor MultiJet 1 b-tag Sideband Fit

1

χ ∼ b b → g ~ , g ~ g ~ → pp = 1.0 µ = 100 GeV,

χ ∼

= 1400 GeV, m

g ~

m

Events

1 10

2

10

CMS simulation (13 TeV)

1

2.1 fb razor MultiJet 2 b-tag Sideband Fit = 100 GeV

χ ∼

= 1400 GeV, m

g ~

m

Events

1 10

2

10

CMS simulation (13 TeV)

1

2.1 fb razor MultiJet 2 b-tag Sideband Fit = 100 GeV

χ ∼

= 1400 GeV, m

g ~

m

Events

1 −

10 1 10

2

10

Sim. Data

Fit Total = 1.0 µ , g ~ g ~ → pp

1

χ ∼ b b → g ~

CMS simulation (13 TeV)

1

2.1 fb razor MultiJet 2 b-tag Sideband Fit = 100 GeV

χ ∼

= 1400 GeV, m

g ~

m

Bin Number 5 10 15 20 25 30 35

σ Stat.+Sys. n

5 − 5

σ Stat.+Sys. n 4 − 2 − 2 4 [GeV]

R

M 600 1000 2000 3000

2

R 0.3 0.4 0.5 0.6 0.7 0.8 1

0.5

0.6 0.6

0.6
0.6
0.4
0.4
0.6
0.5

0.8 0.7

1.1
0.2
0.9

1.6 1.7

CMS simulation (13 TeV)

1

2.1 fb

razor MultiJet 2 b-tag Sideband Fit

1

χ ∼ b b → g ~ , g ~ g ~ → pp = 1.0 µ = 100 GeV,

χ ∼

= 1400 GeV, m

g ~

m

[GeV]

R

M 500 1000 1500 2000 2500 3000 3500 4000

2

R 0.4 0.6 0.8 1 1.2 1.4

Sim. Data

2 −

10

1 −

10 1

CMS simulation (13 TeV)

1

2.1 fb razor MultiJet 2 b-tag Sideband Fit

1

χ ∼ b b → g ~ , g ~ g ~ → pp = 1.0 µ = 100 GeV,

χ ∼

= 1400 GeV, m

g ~

m

Events

1 10

2

10

CMS simulation (13 TeV)

1

2.1 fb 3 b-tag Sideband Fit ≥ razor MultiJet = 100 GeV

χ ∼

= 1400 GeV, m

g ~

m

Events

1 10

2

10

CMS simulation (13 TeV)

1

2.1 fb 3 b-tag Sideband Fit ≥ razor MultiJet = 100 GeV

χ ∼

= 1400 GeV, m

g ~

m

Events

1 −

10 1 10

2

10

Sim. Data

Fit Total = 1.0 µ , g ~ g ~ → pp

1

χ ∼ b b → g ~

CMS simulation (13 TeV)

1

2.1 fb 3 b-tag Sideband Fit ≥ razor MultiJet = 100 GeV

χ ∼

= 1400 GeV, m

g ~

m

Bin Number 5 10 15 20 25 30 35

σ Stat.+Sys. n

5 − 5

σ Stat.+Sys. n 4 − 2 − 2 4 [GeV]

R

M 600 1000 2000 3000

2

R 0.3 0.4 0.5 0.6 0.7 0.8 1

0.3

0.8 -0.4 1.0 0.8 1.4 1.4 1.4 2.8 1.9 3.1

CMS simulation (13 TeV)

1

2.1 fb

3 b-tag Sideband Fit ≥ razor MultiJet

1

χ ∼ b b → g ~ , g ~ g ~ → pp = 1.0 µ = 100 GeV,

χ ∼

= 1400 GeV, m

g ~

m

58 / 63

SLIDE 59

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

0-lepton Signal Regions

[GeV]

R

M 500 1000 1500 2000 2500 3000 3500 4000

2

R 0.4 0.6 0.8 1 1.2 1.4 Data

1 −

10 1 10

CMS preliminary (13 TeV)

1

2.1 fb

0 b-tag Sideband Fit ≥ razor MultiJet

Events

1 10

2

10

3

10

CMS preliminary (13 TeV)

1

2.1 fb razor MultiJet 0 b-tag Sideband Fit

Events

1 10

2

10

3

10

CMS preliminary (13 TeV)

1

2.1 fb razor MultiJet 0 b-tag Sideband Fit

Events

1 −

10 1 10

2

10 Data Fit Total

CMS preliminary (13 TeV)

1

2.1 fb razor MultiJet 0 b-tag Sideband Fit

Bin Number 5 10 15 20 25 30 35

σ Stat.+Sys. n

5 − 5

[GeV]

R

M 500 1000 1500 2000 2500 3000 3500 4000

2

R 0.4 0.6 0.8 1 1.2 1.4 Data

1 −

10 1 10

CMS preliminary (13 TeV)

1

2.1 fb

razor MultiJet 0 b-tag Sideband Fit

Events

1 10

2

10

CMS preliminary (13 TeV)

1

2.1 fb razor MultiJet 1 b-tag Sideband Fit

Events

1 10

2

10

CMS preliminary (13 TeV)

1

2.1 fb razor MultiJet 1 b-tag Sideband Fit

Events

1 −

10 1 10

2

10 Data Fit Total

CMS preliminary (13 TeV)

1

2.1 fb razor MultiJet 1 b-tag Sideband Fit

Bin Number 5 10 15 20 25 30 35

σ Stat.+Sys. n

5 − 5

[GeV]

R

M 500 1000 1500 2000 2500 3000 3500 4000

2

R 0.4 0.6 0.8 1 1.2 1.4 Data

2 −

10

1 −

10 1 10

CMS preliminary (13 TeV)

1

2.1 fb

razor MultiJet 1 b-tag Sideband Fit

Events

1 10

2

10

CMS preliminary (13 TeV)

1

2.1 fb razor MultiJet 2 b-tag Sideband Fit

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb razor MultiJet 2 b-tag Sideband Fit

Events

1 −

10 1 10 Data Fit Total

CMS preliminary (13 TeV)

1

2.1 fb razor MultiJet 2 b-tag Sideband Fit

Bin Number 5 10 15 20 25 30 35

σ Stat.+Sys. n

5 − 5

[GeV]

R

M 500 1000 1500 2000 2500 3000 3500 4000

2

R 0.4 0.6 0.8 1 1.2 1.4 Data

2 −

10

1 −

10 1

CMS preliminary (13 TeV)

1

2.1 fb

razor MultiJet 2 b-tag Sideband Fit

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb 3 b-tag Sideband Fit ≥ razor MultiJet

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb 3 b-tag Sideband Fit ≥ razor MultiJet

Events

1 −

10 1 10 Data Fit Total

CMS preliminary (13 TeV)

1

2.1 fb 3 b-tag Sideband Fit ≥ razor MultiJet

Bin Number 5 10 15 20 25 30 35

σ Stat.+Sys. n

5 − 5

59 / 63

SLIDE 60

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Muon Signal Regions

[GeV]

R

M 500 1000 1500 2000 2500 3000 3500 4000

2

R 0.2 0.4 0.6 0.8 1 1.2 1.4 Data

2 −

10

1 −

10 1

CMS preliminary (13 TeV)

1

2.1 fb

0 b-tag Sideband Fit ≥ razor MuMultiJet

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb razor MuMultiJet 0 b-tag Sideband Fit

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb razor MuMultiJet 0 b-tag Sideband Fit

Events

1 −

10 1 10 Data Fit Total

CMS preliminary (13 TeV)

1

2.1 fb razor MuMultiJet 0 b-tag Sideband Fit

Bin Number 10 20 30 40 50

σ Stat.+Sys. n

5 − 5

[GeV]

R

M 500 1000 1500 2000 2500 3000 3500 4000

2

R 0.2 0.4 0.6 0.8 1 1.2 1.4 Data

2 −

10

1 −

10 1

CMS preliminary (13 TeV)

1

2.1 fb

razor MuMultiJet 0 b-tag Sideband Fit

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb razor MuMultiJet 1 b-tag Sideband Fit

Events

1 10

2

10

CMS preliminary (13 TeV)

1

2.1 fb razor MuMultiJet 1 b-tag Sideband Fit

Events

1 −

10 1 10 Data Fit Total

CMS preliminary (13 TeV)

1

2.1 fb razor MuMultiJet 1 b-tag Sideband Fit

Bin Number 10 20 30 40 50

σ Stat.+Sys. n

5 − 5

[GeV]

R

M 500 1000 1500 2000 2500 3000 3500 4000

2

R 0.2 0.4 0.6 0.8 1 1.2 1.4 Data

2 −

10

1 −

10 1

CMS preliminary (13 TeV)

1

2.1 fb

razor MuMultiJet 1 b-tag Sideband Fit

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb razor MuMultiJet 2 b-tag Sideband Fit

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb razor MuMultiJet 2 b-tag Sideband Fit

Events

1 −

10 1 10 Data Fit Total

CMS preliminary (13 TeV)

1

2.1 fb razor MuMultiJet 2 b-tag Sideband Fit

Bin Number 10 20 30 40 50

σ Stat.+Sys. n

5 − 5

[GeV]

R

M 500 1000 1500 2000 2500 3000 3500 4000

2

R 0.2 0.4 0.6 0.8 1 1.2 1.4 Data

2 −

10

1 −

10 1

CMS preliminary (13 TeV)

1

2.1 fb

razor MuMultiJet 2 b-tag Sideband Fit

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb 3 b-tag Sideband Fit ≥ razor MuMultiJet

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb 3 b-tag Sideband Fit ≥ razor MuMultiJet

Events

1 −

10 1 10 Data Fit Total

CMS preliminary (13 TeV)

1

2.1 fb 3 b-tag Sideband Fit ≥ razor MuMultiJet

Bin Number 10 20 30 40 50

σ Stat.+Sys. n

5 − 5

60 / 63

SLIDE 61

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Electron Signal Regions

[GeV]

R

M 500 1000 1500 2000 2500 3000 3500 4000

2

R 0.2 0.4 0.6 0.8 1 1.2 1.4 Data

2 −

10

1 −

10 1

CMS preliminary (13 TeV)

1

2.1 fb

0 b-tag Sideband Fit ≥ razor EleMultiJet

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb razor EleMultiJet 0 b-tag Sideband Fit

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb razor EleMultiJet 0 b-tag Sideband Fit

Events

1 −

10 1 10 Data Fit Total

CMS preliminary (13 TeV)

1

2.1 fb razor EleMultiJet 0 b-tag Sideband Fit

Bin Number 10 20 30 40 50

σ Stat.+Sys. n

5 − 5

[GeV]

R

M 500 1000 1500 2000 2500 3000 3500 4000

2

R 0.2 0.4 0.6 0.8 1 1.2 1.4 Data

2 −

10

1 −

10 1

CMS preliminary (13 TeV)

1

2.1 fb

razor EleMultiJet 0 b-tag Sideband Fit

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb razor EleMultiJet 1 b-tag Sideband Fit

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb razor EleMultiJet 1 b-tag Sideband Fit

Events

1 −

10 1 10 Data Fit Total

CMS preliminary (13 TeV)

1

2.1 fb razor EleMultiJet 1 b-tag Sideband Fit

Bin Number 10 20 30 40 50

σ Stat.+Sys. n

5 − 5

[GeV]

R

M 500 1000 1500 2000 2500 3000 3500 4000

2

R 0.2 0.4 0.6 0.8 1 1.2 1.4 Data

2 −

10

1 −

10 1

CMS preliminary (13 TeV)

1

2.1 fb

razor EleMultiJet 1 b-tag Sideband Fit

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb razor EleMultiJet 2 b-tag Sideband Fit

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb razor EleMultiJet 2 b-tag Sideband Fit

Events

1 −

10 1 10 Data Fit Total

CMS preliminary (13 TeV)

1

2.1 fb razor EleMultiJet 2 b-tag Sideband Fit

Bin Number 10 20 30 40 50

σ Stat.+Sys. n

5 − 5

[GeV]

R

M 500 1000 1500 2000 2500 3000 3500 4000

2

R 0.2 0.4 0.6 0.8 1 1.2 1.4 Data

2 −

10

1 −

10 1

CMS preliminary (13 TeV)

1

2.1 fb

razor EleMultiJet 2 b-tag Sideband Fit

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb 3 b-tag Sideband Fit ≥ razor EleMultiJet

Events

1 10

CMS preliminary (13 TeV)

1

2.1 fb 3 b-tag Sideband Fit ≥ razor EleMultiJet

Events

1 −

10 1 10 Data Fit Total

CMS preliminary (13 TeV)

1

2.1 fb 3 b-tag Sideband Fit ≥ razor EleMultiJet

Bin Number 10 20 30 40 50

σ Stat.+Sys. n

5 − 5

61 / 63

SLIDE 62

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Limit Plots

(GeV)

g ~

m

600 800 1000 1200 1400 1600 1800

(GeV)

χ ∼

m

200 400 600 800 1000 1200 1400 1600 1800 (13 TeV)

1

CMS preliminary 2.1 fb 95% C.L. NLO+NLL exclusion g ~ g ~ → pp

1

χ ∼ b b → g ~ 100%

1

χ ∼ t t → g ~ 100%

1

χ ∼ q q → g ~ 100% Observed Expected

62 / 63

SLIDE 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

ATLAS Early Run II Projections

) [GeV] g ~ m(

1200 1300 1400 1500 1600 1700 1800 1900 2000 2100

Discovery p

8

10

7

10

6

10

5

10

4

10

3

10

2

10

1

10 1 10

)

bs

(95% CL

1

8 TeV, 20 fb

B/B=20 % ∆ = 13 TeV, s

1

1 fb

1

2 fb

1

5 fb

1

10 fb

σ σ 5 σ 4 σ 3 σ 2 σ 1 Simulation Preliminary ATLAS

miss T

Discovery reach, 0-lepton+jets+E production g ~ g ~ )=0 GeV

1

χ ∼ , m(

1

χ ∼ q q → g ~

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN 16th March 2016 Moriond EW 1 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Introduction

2 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Contents

3 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

The Signatures We Search For

4 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Variables used to define signal regions (ATLAS)

5 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

ATLAS Signal Regions (for reference)

6 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

ATLAS Signal Regions (for reference)

7 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

ATLAS Signal Regions (for reference)

8 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Variables used to define signal regions (CMS I)

9 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Variables used to define signal regions (CMS II)

10 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

CMS Signal Regions (for reference)

11 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

CMS Signal Regions (for reference)

12 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

CMS Signal Regions (for reference)

13 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Estimating the W and t¯ t backgrounds (ATLAS)

14 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Estimating the W and t¯ t backgrounds (CMS)

15 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Estimating the Z→ νν background (ATLAS+CMS)

16 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Estimating the Multi-jet background (ATLAS)

17 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Razor Search Background Estimation (CMS)

18 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Results and Statistical interpretation (ATLAS)

19 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN

Results and Statistical interpretation (CMS)

20 / 63

0-lep. SUSY Searches from ATLAS and CMS

Chris Young, CERN