[PPT] - Displaced Leptons from Gauge Mediation and Beyond Jared A. Evans PowerPoint Presentation

SLIDE 1

Displaced Leptons from Gauge Mediation and Beyond

Jared A. Evans

jaredaevans@gmail.com Department of Physics University of Illinois, Urbana-Champaign

CMS 1409.4789 Evans, Shelton – to appear

Evans (UIUC) Displaced Leptons November 13, 2015 1 / 24

SLIDE 2

Outline

Motivation for Displaced Leptons GMSB and ˜ τR NLSPs CMS Displaced eµ Search and ˜ τR Same-Flavor Displaced Lepton Models Same-Flavor Displaced Lepton Search for 13 TeV

Evans (UIUC) Displaced Leptons November 13, 2015 2 / 24

SLIDE 3

The LHC Program

The LHC has constrained many new particles in many models

◮ MSSM ◮ t′/b′ ◮ UED ◮ GMSB ◮ RPV ◮ Stealth ◮ 2HDM ◮ ...

Signature Space

These searches cast a wide net

Evans (UIUC) Displaced Leptons November 13, 2015 3 / 24

SLIDE 4

The LHC Program

The LHC has constrained many new particles in many models

◮ MSSM ◮ t′/b′ ◮ UED ◮ GMSB ◮ RPV ◮ Stealth ◮ 2HDM ◮ ...

Signature Space

These searches cast a wide net – but there are gaps

Need comprehensive program that covers ALL new physics scenarios Could be our FIRST pathway to BSM physics!

Evans (UIUC) Displaced Leptons November 13, 2015 3 / 24

SLIDE 5

The LHC Program

The LHC has constrained many new particles in many models

◮ MSSM ◮ t′/b′ ◮ UED ◮ GMSB ◮ RPV ◮ Stealth ◮ 2HDM ◮ ...

Signature Space

These searches cast a wide net – but there are gaps

Need comprehensive program that covers ALL new physics scenarios Could be our ONLY pathway to BSM physics!!!

Evans (UIUC) Displaced Leptons November 13, 2015 3 / 24

SLIDE 6

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j b X γ X X e X X X µ X X X X τ X X X X X

Search arXiv Symbol Comments

◮ Focused on pair produced, heavy decays inside the detector ◮ Only a selection of searches used, but fairly representative ◮ Cavalier about lifetime ranges and triggers; ignoring tops ◮ Bold is where searches are really optimized

Evans (UIUC) Displaced Leptons November 13, 2015 4 / 24

SLIDE 7

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j

jj jj jj jj jj jj jj

b X

jj jj jj jj jj jj

γ X X e X X X µ X X X X τ X X X X X

Search arXiv Symbol Comments CMS Displaced Dijets 1411.6530 jj mX > 50 GeV

Evans (UIUC) Displaced Leptons November 13, 2015 4 / 24

SLIDE 8

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j

jj/dv jj/dv jj/dv jj/dv jj/dv jj/dv jj/dv

b X

jj/dv jj/dv jj/dv jj/dv jj/dv jj/dv

γ X X e X X X

dv dv dv

µ X X X X

dv dv

τ X X X X X

dv Search arXiv Symbol Comments CMS Displaced Dijets 1411.6530 jj mX > 50 GeV ATLAS Displaced Vertex 1504.05162 dv mX > 10 GeV

Evans (UIUC) Displaced Leptons November 13, 2015 4 / 24

SLIDE 9

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j

jj/dv jj/dv jj/dv jj/dv jj/dv jj/dv jj/dv

b X

jj/dv jj/dv jj/dv jj/dv jj/dv jj/dv

γ X X e X X X

dv/ll dv dv/ll

µ X X X X

dv/ll dv/ll

τ X X X X X

dv/ll Search arXiv Symbol Comments CMS Displaced Dijets 1411.6530 jj mX > 50 GeV ATLAS Displaced Vertex 1504.05162 dv mX > 10 GeV CMS Displaced Dilepton 1411.6977 ll mX > 15 GeV

Evans (UIUC) Displaced Leptons November 13, 2015 4 / 24

SLIDE 10

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j

jj/dv jj/dv jj/dv/dA jj/dv jj/dv jj/dv jj/dv

b X

jj/dv jj/dv/dA jj/dv jj/dv jj/dv jj/dv

γ X X

dA dA dA dA dA

e X X X

dv/ll dv dv/ll

µ X X X X

dv/ll dv/ll

τ X X X X X

dv/ll Search arXiv Symbol Comments CMS Displaced Dijets 1411.6530 jj mX > 50 GeV ATLAS Displaced Vertex 1504.05162 dv mX > 10 GeV CMS Displaced Dilepton 1411.6977 ll mX > 15 GeV ATLAS Delayed Photon 1409.5542 dA mX 100 GeV

Evans (UIUC) Displaced Leptons November 13, 2015 4 / 24

SLIDE 11

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j

jj/dv jj/dv jj/dv/dA jj/dv jj/dv jj/dv/em jj/dv

b X

jj/dv jj/dv/dA jj/dv jj/dv jj/dv/em jj/dv

γ X X

dA dA dA dA/em dA

e X X X

dv/ll dv dv/ll

µ X X X X

dv/ll dv/ll

τ X X X X X

dv/ll/em em Search arXiv Symbol Comments CMS Displaced Dijets 1411.6530 jj mX > 50 GeV ATLAS Displaced Vertex 1504.05162 dv mX > 10 GeV CMS Displaced Dilepton 1411.6977 ll mX > 15 GeV ATLAS Delayed Photon 1409.5542 dA mX 100 GeV CMS Displaced eµ 1409.4789 em Best at LFU

Evans (UIUC) Displaced Leptons November 13, 2015 4 / 24

SLIDE 12

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j

jj/dv jj/dv jj/dv/dA jj/dv jj/dv jj/dv/em jj/dv

b X

jj/dv jj/dv/dA jj/dv jj/dv jj/dv/em jj/dv

γ X X

dA dA dA dA/em dA

e X X X

dv/ll dv dv/ll

µ X X X X

dv/ll dv/ll

τ X X X X X

dv/ll/em em

q q q q q q q q q q q q q q q q q q q q qq q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q qqqqq qqqqq qqqqq q qqqqq qqqqq qqqqq q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q qq q q q q q q q q q q q q q q q q q q q

Search arXiv Symbol Comments CMS Displaced Dijets 1411.6530 jj mX > 50 GeV ATLAS Displaced Vertex 1504.05162 dv mX > 10 GeV CMS Displaced Dilepton 1411.6977 ll mX > 15 GeV ATLAS Delayed Photon 1409.5542 dA mX 100 GeV CMS Displaced eµ 1409.4789 em Best at LFU

Evans (UIUC) Displaced Leptons November 13, 2015 4 / 24

SLIDE 13

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j b X γ X X e X X X µ X X X X τ X X X X X

Models Symbol

Evans (UIUC) Displaced Leptons November 13, 2015 5 / 24

SLIDE 14

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j

M M

b X

M M

γ X X e X X X µ X X X X τ X X X X X

Models Symbol Mini-Split M

Evans (UIUC) Displaced Leptons November 13, 2015 5 / 24

SLIDE 15

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j

MG MG

b X

MG MG

γ X X

G

e X X X

G G

µ X X X X

G G

τ X X X X X

G G Models Symbol Mini-Split M GMSB G

Evans (UIUC) Displaced Leptons November 13, 2015 5 / 24

SLIDE 16

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j

MGR R R R R MGR

b X

MGR R R R MGR

γ X X

G

e X X X

GR R R GR

µ X X X X

GR R GR

τ X X X X X

GR GR Models Symbol Mini-Split M GMSB G RPV/dRPV R

Evans (UIUC) Displaced Leptons November 13, 2015 5 / 24

SLIDE 17

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j

MGRS R R R R MGR

b X

MGRS R R R MGR

γ X X

S G

e X X X

GR R R GR

µ X X X X

GR R GR

τ X X X X X

GR GR Models Symbol Mini-Split M GMSB G RPV/dRPV R Stealth S

Evans (UIUC) Displaced Leptons November 13, 2015 5 / 24

SLIDE 18

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j

MGRS R R R R MGR

b X

MGRSH R R R MGR

γ X X

S G

e X X X

GR R R GR

µ X X X X

GRH R GR

τ X X X X X

GRH GR Models Symbol Mini-Split M GMSB G RPV/dRPV R Stealth S Higgs Mixed H

Evans (UIUC) Displaced Leptons November 13, 2015 5 / 24

SLIDE 19

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j

MGRSγ R R R R MGR

b X

MGRSHγ R R R MGR

γ X X

S G

e X X X

GRγ R R GR

µ X X X X

GRHγ R GR

τ X X X X X

GRHγ GR Models Symbol Mini-Split M GMSB G RPV/dRPV R Stealth S Higgs Mixed H Dark Photon γ

Evans (UIUC) Displaced Leptons November 13, 2015 5 / 24

SLIDE 20

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j

MGRSγ R R R R MGRD

b X

MGRSHγ R R R MGRD

γ X X

S G

e X X X

GRγ R R GRD

µ X X X X

GRHγ R GRD

τ X X X X X

GRHγ GRD Models Symbol Mini-Split M GMSB G RPV/dRPV R Stealth S Higgs Mixed H Dark Photon γ MD Freeze-In Dark Matter D

Evans (UIUC) Displaced Leptons November 13, 2015 5 / 24

SLIDE 21

Exotic Objects (pp → XX, X → o1o2 or X → o1o2o3)

2o1

j b γ e µ τ E /T j

MGRSγ R R R R MGRD

b X

MGRSHγ R R R MGRD

γ X X

S G

e X X X

GRγ R R GRD

µ X X X X

GRHγ R GRD

τ X X X X X

GRHγ GRD

q q q q q q q q q q q q q q q q q q q q q q q q q q q qq q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q qqqqq qqqqq qqqqqq qqqqqq q qqqqqq qqqqqq qqqqq qqqqq q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q qq q q q q q q q q q q q q q q q q q q q q q q q q q q

Models Symbol Mini-Split M GMSB G RPV/dRPV R Stealth S Higgs Mixed H Dark Photon γ MD Freeze-In Dark Matter D Well-motivated Theoretically Weak Coverage Experimentally

Evans (UIUC) Displaced Leptons November 13, 2015 5 / 24

SLIDE 22

Displaced Leptons in Prompt Searches

Prompt lepton-based searches:

◮ Quality criteria drop displaced electrons ◮ Displaced muons veto events (cosmics) ◮ Vetoes range from 50 µm–1 mm

Prompt jets+E /T searches:

◮ Veto events with leptons ◮ Definition not always transparent

Evans (UIUC) Displaced Leptons November 13, 2015 6 / 24

SLIDE 23

Displaced Leptons in Prompt Searches

Prompt lepton-based searches:

◮ Quality criteria drop displaced electrons ◮ Displaced muons veto events (cosmics) ◮ Vetoes range from 50 µm–1 mm

Prompt jets+E /T searches:

◮ Veto events with leptons ◮ Definition not always transparent

Very dangerous region! pp → ˜ ℓ+˜ ℓ− + X → {displaced muons} + X lives in a prompt search blind spot! Displaced electrons and taus ⇒ reduced efficiency

Evans (UIUC) Displaced Leptons November 13, 2015 6 / 24

SLIDE 24

Gauge Mediation and ˜ τR NLSPs

Lightning Review of Minimal GMSB

q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q qqqqqq qqqqqq qqqqqqq qqqqqqq qqqqqqqq q qqqqqqqq qqqqqqq qqqqqqq qqqqqq qqqqqq q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q qqqqqq qqqqqq qqqqqqq qqqqqqq qqqqqqqq q qqqqqqqq qqqqqqq qqqqqqq qqqqqq qqqqqq q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .

MSSM Q, U, Hu L, etc Messengers, Φ SUSY

. . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

X W ∼ XΦ˜ Φ + {MSSM yukawas} X = M + θ2F, Λ ≡ F/M, ˜ Λ ≡

Λ 16π2

Evans (UIUC) Displaced Leptons November 13, 2015 7 / 24

SLIDE 25

Gauge Mediation and ˜ τR NLSPs

Lightning Review of Minimal GMSB

q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q qqqqqq qqqqqq qqqqqqq qqqqqqq qqqqqqqq q qqqqqqqq qqqqqqq qqqqqqq qqqqqq qqqqqq q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q qqqqqq qqqqqq qqqqqqq qqqqqqq qqqqqqqq q qqqqqqqq qqqqqqq qqqqqqq qqqqqq qqqqqq q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .

MSSM Q, U, Hu L, etc Messengers, Φ SUSY

. . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

X W ∼ XΦ˜ Φ + {MSSM yukawas} X = M + θ2F, Λ ≡ F/M, ˜ Λ ≡

Λ 16π2

Mr ∼ Neffg2

r ˜

Λ A-terms = 0 m2

soft ∼ 2NeffCrg4 r ˜

Λ2 (Cr quadratic Casimirs O (1))

Evans (UIUC) Displaced Leptons November 13, 2015 7 / 24

SLIDE 26

Gauge Mediation and ˜ τR NLSPs

Lightning Review of Minimal GMSB

q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q qqqqqq qqqqqq qqqqqqq qqqqqqq qqqqqqqq q qqqqqqqq qqqqqqq qqqqqqq qqqqqq qqqqqq q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q qqqqqq qqqqqq qqqqqqq qqqqqqq qqqqqqqq q qqqqqqqq qqqqqqq qqqqqqq qqqqqq qqqqqq q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .

MSSM Q, U, Hu L, etc Messengers, Φ SUSY

. . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

X W ∼ XΦ˜ Φ + {MSSM yukawas} X = M + θ2F, Λ ≡ F/M, ˜ Λ ≡

Λ 16π2

Mr ∼ Neffg2

r ˜

Λ A-terms = 0 m2

soft ∼ 2NeffCrg4 r ˜

Λ2 (Cr quadratic Casimirs O (1)) Potential NLSP Masses:

m˜

B = Neffg2 1 ˜

Λ Neff ≥ 2 ⇒ ˜ τR NLSP m˜

ℓR =

6Neff

5 g2 1 ˜

Λ (or large running)

Evans (UIUC) Displaced Leptons November 13, 2015 7 / 24

SLIDE 27

Gauge Mediation and ˜ τR NLSPs

Lifetimes

GMSB is a very well-motivated source of displaced particles cτ ≈ 100 µm 100 GeV m˜

τ

5 √ F 100 TeV 4 What is √ F?

Evans (UIUC) Displaced Leptons November 13, 2015 8 / 24

SLIDE 28

Gauge Mediation and ˜ τR NLSPs

Lifetimes

GMSB is a very well-motivated source of displaced particles cτ ≈ 100 µm 100 GeV m˜

τ

5 √ F 100 TeV 4 What is √ F? F < M2; otherwise arbitrary cτ ∼ 10 µm 100 GeV m˜

τ

M √ F 4 1 N2

eff

(minimal GM only) LHC relevant range: 100 µm cτ 1 m Measuring m˜

τR & cτ˜ τR probes SUSY breaking!

Evans (UIUC) Displaced Leptons November 13, 2015 8 / 24

SLIDE 29

Gauge Mediation and ˜ τR NLSPs

LEP Limits on Slepton NLSPs

50 60 70 80 90 100

12
10
8
6

log(τlife/s) m(τ

∼ 1) (GeV/c2)

50 60 70 80 90 100

12
10
8
6

a) τ

∼ 1 (τ ∼ 1 NLSP)

50 60 70 80 90 100

12
10
8
6

log(τlife/s) m(µ

∼ R) (GeV/c2)

50 60 70 80 90 100

12
10
8
6

b) µ

∼ R (l ∼ R co-NLSP)

c) e

∼ (l ∼ co-NLSP)

m˜

τ > 87 GeV

m˜

µ > 94 GeV

OPAL placed the best limits on sleptons of all lifetimes

Evans (UIUC) Displaced Leptons November 13, 2015 9 / 24

SLIDE 30

CMS Displaced Lepton Search

Cuts Cut Summary of CMS eµ Preselection 1 OS e±µ∓ pair dℓ > 100 µm pT,ℓ > 25 GeV, |ηℓ| < 2.5 Reject 1.44 < |ηe| < 1.56 Irel,e

∆R=0.3 < 0.10, Irel,µ ∆R=0.4 < 0.12

∆Rℓj > 0.5 ∀ jets with pT > 10 GeV ∆Reµ > 0.5 Veto additional leptons

0.1 0.05 0.02 2 1 0.1 0.05 1 0.02 2

dΜ de SR3 SR2 SR1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . .

Evans (UIUC) Displaced Leptons November 13, 2015 10 / 24

SLIDE 31

CMS Displaced Lepton Search

Cuts Cut Summary of CMS eµ Preselection 1 OS e±µ∓ pair dℓ > 100 µm pT,ℓ > 25 GeV, |ηℓ| < 2.5 Reject 1.44 < |ηe| < 1.56 Irel,e

∆R=0.3 < 0.10, Irel,µ ∆R=0.4 < 0.12

∆Rℓj > 0.5 ∀ jets with pT > 10 GeV ∆Reµ > 0.5 Veto additional leptons

0.1 0.05 0.02 2 1 0.1 0.05 1 0.02 2

dΜ de SR3 SR2 SR1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . .

Evans (UIUC) Displaced Leptons November 13, 2015 10 / 24

SLIDE 32

CMS Displaced Lepton Search

Cuts Cut Summary of CMS eµ Preselection 1 OS e±µ∓ pair dℓ > 100 µm pT,ℓ > 25 GeV, |ηℓ| < 2.5 Reject 1.44 < |ηe| < 1.56 Irel,e

∆R=0.3 < 0.10, Irel,µ ∆R=0.4 < 0.12

∆Rℓj > 0.5 ∀ jets with pT > 10 GeV ∆Reµ > 0.5 Veto additional leptons

0.1 0.05 0.02 2 1 0.1 0.05 1 0.02 2

dΜ de SR3 SR2 SR1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . .

Evans (UIUC) Displaced Leptons November 13, 2015 10 / 24

SLIDE 33

CMS Displaced Lepton Search

Cuts Cut Summary of CMS eµ Preselection 1 OS e±µ∓ pair dℓ > 100 µm pT,ℓ > 25 GeV, |ηℓ| < 2.5 Reject 1.44 < |ηe| < 1.56 Irel,e

∆R=0.3 < 0.10, Irel,µ ∆R=0.4 < 0.12

∆Rℓj > 0.5 ∀ jets with pT > 10 GeV ∆Reµ > 0.5 Veto additional leptons

0.1 0.05 0.02 2 1 0.1 0.05 1 0.02 2

dΜ de SR3 SR2 SR1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . .

Evans (UIUC) Displaced Leptons November 13, 2015 10 / 24

SLIDE 34

CMS Displaced Lepton Search

Impact Parameter

˜ µ → µ˜ G τ → µν¯ ν

d0 dZ

Impact Parameter is not the location of parent b and τ decay products are more collimated

Evans (UIUC) Displaced Leptons November 13, 2015 11 / 24

SLIDE 35

CMS Displaced Lepton Search

Backgrounds & Data

[cm] Electron d 0.1 0.2 0.3 0.4 0.5 Entries / 0.01 cm

3

10

2

10

1

10 1 10

2

10

3

10

Data

Stat. & syst. errors

τ τ → Z HF Other EW Top quark = 0.1 cm) τ (c t ~ t ~ = 1 cm) τ (c t ~ t ~ = 10 cm) τ (c t ~ t ~ = 0.1 cm) τ (c t ~ t ~ = 1 cm) τ (c t ~ t ~ = 10 cm) τ (c t ~ t ~

CMS

(8 TeV)

1

19.7 fb

[cm] Muon d 0.1 0.2 0.3 0.4 0.5 Entries / 0.01 cm

3

10

2

10

1

10 1 10

2

10

3

10

Data

Stat. & syst. errors

τ τ → Z HF Other EW Top quark = 0.1 cm) τ (c t ~ t ~ = 1 cm) τ (c t ~ t ~ = 10 cm) τ (c t ~ t ~ = 0.1 cm) τ (c t ~ t ~ = 1 cm) τ (c t ~ t ~ = 10 cm) τ (c t ~ t ~

CMS

(8 TeV)

1

19.7 fb

Event source SR1 SR2 SR3 Other EW 0.65 ± 0.13 ± 0.09 (0.89 ± 0.53 ± 0.12) × 10−2 <(89 ± 53 ± 12) × 10−4 Top quark 0.77 ± 0.04 ± 0.08 (1.25 ± 0.26 ± 0.12) × 10−2 (2.4 ± 1.3 ± 0.2) × 10−4 Z!ττ 3.93 ± 0.42 ± 0.39 (0.73 ± 0.73 ± 0.07) × 10−2 <(73 ± 73 ± 7) × 10−4 HF 12.7 ± 0.2 ± 3.8 (98 ± 6 ± 30) × 10−2 (340 ± 110 ± 100) × 10−4 Total expected background 18.0 ± 0.5 ± 3.8 1.01 ± 0.06 ± 0.30 0.051 ± 0.015 ± 0.010 Observed 19 Evans (UIUC) Displaced Leptons November 13, 2015 12 / 24

SLIDE 36

CMS Displaced Lepton Search

Recast Limits on ˜ τR

No limits on direct ˜ τR production!

Evans (UIUC) Displaced Leptons November 13, 2015 13 / 24

SLIDE 37

CMS Displaced Lepton Search

Recast Limits on ˜ τR

No limits on direct ˜ τR production! But . . . a ˜ τR is not expected in isolation Near degenerate slepton limits m˜

eR = m˜ µR = m˜ τR + 10 GeV

˜ ℓR → ˜ τR + {soft}

Evans (UIUC) Displaced Leptons November 13, 2015 13 / 24