2HDM HDM-based and dark matter SUSY-inspired models Assembling the - - PowerPoint PPT Presentation

▶
2hdm hdm based and
SMART_READER_LITE
LIVE PREVIEW

2HDM HDM-based and dark matter SUSY-inspired models Assembling the - - PowerPoint PPT Presentation

May 05, 2023 448 likes •681 views

The puzzle of 2HDM HDM-based and dark matter SUSY-inspired models Assembling the pieces Hamburg, 29.october.18 Arely Cortes-Gonzalez On behalf of ATLAS and CMS Sc Scope ope Theoretical Framework Effective Field Theories Simplified models

slide-1
SLIDE 1

The puzzle of dark matter

Assembling the pieces

Hamburg, 29.october.18

2HDM HDM-based and SUSY-inspired models

Arely Cortes-Gonzalez On behalf of ATLAS and CMS

slide-2
SLIDE 2

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

Sc Scope

  • pe

2

Theoretical Framework

Simplified models Effective Field Theories

Effective field theories (EFT) of DM interaction with WIMPs. Effective Lagrangian approach with parameters: M* and mDM. Different operators can be considered. Theory only valid if M* is much larger than the energy scale present in reaction. This is in fact a potential issue at the LHC.

Less simplified models

UV complete models, typically not restricted by Higgs measurements. A much larger parameter space affecting the kinematics, cross sections, couplings, etc. Much richer phenomenology! Natural solution to EFT

  • validity. Simplified

models considers the production of a mediator particle. E.g. for a s-channel mediator we can have: mmed, mDM, gDM, gq. gl

slide-3
SLIDE 3

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

Sc Scope

  • pe

3

Simplified models Effective Field Theories

Effective field theories (EFT) of DM interaction with WIMPs. Effective Lagrangian approach with parameters: M* and mDM. Different operators can be considered. Theory only valid if M* is much larger than the energy scale present in reaction. This is in fact a potential issue at the LHC.

Less simplified models

UV complete models, typically not restricted by Higgs measurements. A much larger parameter space affecting the kinematics, cross sections, couplings, etc. Much richer phenomenology! Natural solution to EFT

  • validity. Simplified

models considers the production of a mediator particle. E.g. for a s-channel mediator we can have: mmed, mDM, gDM, gq. gl

See talks today by Stanislava Sevova and Will Kalderon 2HDM-based and SUSY-inspired models

Theoretical Framework

slide-4
SLIDE 4

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

2HDM HDM-bas ased ed model dels

4

2HDM + Z’

arXiv: 1402.7074 arXiv: 1507.00966

Extension of type-II 2HDM in the alignment limit. Kinematics independent

  • f tanβ, gZ’
  • r mχ

(if mχ < mA/2).

  • Z’ decays to a Higgs boson h and pseudoscalar A of a 2HDM

(Aàχχ).

  • Assumes 2HDM for DM coupling.
  • A couples to DM and complies with EW precision measurements.
  • Parameters: gauge coupling gZ’ = 0.8, ratio of up- and down-type

vacuum expectation values, tanβ = 1, mχ= 100 GeV.

  • Charged Higgs bosons: mH± = 300 GeV (CMS: mH± = mA).

Scan mA and mZ’ parameters.

arXiv: 1507.00966 arXiv: 1507.00966

slide-5
SLIDE 5

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

2HDM HDM-bas ased ed model dels

5

  • Pseudoscalar mediator a couples DM

to SM and mixes with heavy pseudoscalar A of 2HDM.

  • Rich phenomenology of ET

miss+X

signatures (complementary sensitivity).

  • Additional sensitivity from resonance

searches (A/H(bb, ττ, tt)).

14 parameters

  • Alignment limit: SM Higgs is the lighter of CP-even

states h.

  • sin(β-α) = 1, mh = 125 GeV, ν = 246 GeV
  • Fix quartic coupling λ3 = 3 chosen to ensure stability
  • f Higgs potential.
  • λ3 = λP1 = λP2 = 3
  • mA = mH = mH±
  • Fix DM mass and coupling (between a and DM).
  • mχ = 10 GeV, yχ = 1.
  • mA : mass of heavy

pseudoscalar A

  • ma: mass of mediator a
  • sinθ: mixing angle

between a and A

  • tanß: ratio of VEVs of

the two Higgs doublets. free parameters

arxiv:1701.07427 arXiv:1810.09420

Extension of type-II 2HDM in the alignment limit.

2HDM + a

slide-6
SLIDE 6

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

2HDM HDM-bas ased ed model dels

6

arxiv:1701.07427 arXiv:1810.09420

2HDM + a

Ma = 300 GeV Ma = 400 GeV Ma = 500 GeV

100 200 300 400 500 600 700 0.000 0.002 0.004 0.006 0.008 0.010 0.012 MT(l+l-, ET

miss) [GeV]

1/σ dσ/dMT(l+l-, ET

miss) [GeV-1]

mono-Z, MH = 700 GeV

MA = 400 GeV MA = 700 GeV MA = 1000 GeV

100 200 300 400 500 600 0.000 0.005 0.010 0.015 ET

miss [GeV]

1/σ dσ/dET

miss [GeV-1]

mono-Higgs, Ma = 200 GeV

Ma = 300 GeV Ma = 400 GeV Ma = 500 GeV

100 200 300 400 0.000 0.002 0.004 0.006 0.008 0.010 0.012 0.014 ET

miss [GeV]

1/σ dσ/dET

miss [GeV-1]

mono-Higgs, MA = 700 GeV

MH = 400 GeV MH = 700 GeV MH = 1000 GeV

100 200 300 400 500 600 0.000 0.005 0.010 0.015 0.020 pT,Z [GeV] 1/σ dσ/dpT,Z [GeV-1] mono-Z, Ma = 200 GeV

sinθ = 0.15 sinθ = 0.35 sinθ = 0.7

50 100 150 200 250 300 0.00 0.01 0.02 0.03 0.04 0.05 pT,Z [GeV] dσ/dpT,Z [fb GeV-1] mono-Z, MH,a = {700, 400} GeV

sinθ = 0.15 sinθ = 0.35 sinθ = 0.7

50 100 150 200 250 300 0.0 0.1 0.2 0.3 0.4 0.5 ET

miss [GeV]

dσ/dET

miss [fb GeV-1]

mono-Higgs, MA,a = {700, 400} GeV

Interesting kinematic dependence on model parameter suggests multiple parameters scans are of interest.

slide-7
SLIDE 7

An Analyses

ATLAS-CONF-2018-039 CMS-PAS-EXO-16-050 JHEP 09 (2018) 046

ET

miss+H(bb,γγ,ττ)

Events / bin

1 10

2

10

3

10

4

10

5

10

6

10

7

10

Data Z+jets + single top t t W+jets Diboson SM Vh Background Uncertainty Pre-fit Background mono-h Z’-2HDM = 600 GeV

A

= 1400 GeV, m

Z’

m = 3.75 fb

Signal

σ

Preliminary ATLAS

  • 1

= 13 TeV , 79.8 fb s SR : 0 lepton 2 b-tags

[GeV]

miss T

E

200 300 400 500 600 700 800

Data/SM

0.8 1 1.2

Events / 20 GeV

10 20 30 40 50 60

Data SM Vh Diboson + single top t t Z+jets W+jets Background Uncertainty Pre-fit Background mono-h Z’-2HDM = 600 GeV

A

= 1400 GeV, m

Z’

m = 3.75 fb

Signal

σ

Preliminary ATLAS

  • 1

= 13 TeV , 79.8 fb s SR (Merged) : 0 lepton > 500 GeV

miss T

E 2 b-tags

[GeV]

J

m

50 100 150 200 250

Data/SM

0.5 1 1.5

Resolved and Merged analyses

  • defined. Combined statistically.

Results recently updated with 2015,2016 and 2017 data.

S e e Y S T t a l k s b y P h i l i p p G a d

  • w

a n d D i l i a P

  • r

t i l l

  • .

[GeV]

γ γ

m

110 120 130 140 150 160 170 180

Events / 2 GeV

2 4 6 8 10 12 14 16 Observed

  • Nonres. background pdf

1 s.d. ± 2 s.d. ± SM h contribution Total background pdf

CMS

(13 TeV)

  • 1

35.9 fb

) γ γ DM + h(

> 130 GeV

miss T

p [GeV]

tot T

M

50 100 150 200 250 300 350 400 450 500

Obs./MC

0.5 1 1.5

(13 TeV)

  • 1

35.9 fb

CMS

Events / GeV

1 10

2

10

3

10

4

10

5

10

Observed τ τ → Z Diboson W + jets/multijet +jets ν ν → Z /WW τ τ → h t t

  • Bkg. uncertainty

=300 GeV

A

=1200 GeV, m

Z'

Z'-2HDM, m =1 GeV

DM

=100 GeV, m

Z'

Baryonic Z', m (13 TeV)

  • 1

35.9 fb

CMS

h

τ

h

τ

7

H(γγ) H(bb) H(ττ) H(bb) H(bb)

slide-8
SLIDE 8

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

An Analyses

8

arXiv:1807.11471 PLB 776 (2017) 318

ET

miss + Z(qq’,ll)

S e e Y S T t a l k b y K a y l a M c L e a n

5 −

10

4 −

10

3 −

10

2 −

10

1 −

10 1 10

2

10

3

10

4

10

Events / GeV

Data Z+jets W+jets + single top quark t t Diboson Multijet Background Uncertainty Pre-fit Background = 100%)

inv → H

inv (B → H Vector Mediator Model = 1 GeV

χ

= 600 GeV, m

Z’

m

ATLAS

  • 1

= 13 TeV , 36.1 fb s SR: merged topology 0 leptons, 2 b-tags

400 600 800 1000 1200 1400

[GeV]

miss T

E

0.5 1 1.5

Data/SM

4 −

10

3 −

10

2 −

10

1 −

10 1 10

2

10

3

10

4

10

5

10

6

10

Events / GeV

Data Z+jets W+jets + single top quark t t Diboson Multijet Background Uncertainty Pre-fit Background = 100%)

inv → H

inv (B → H Vector Mediator Model = 1 GeV

χ

= 600 GeV, m

Z’

m

ATLAS

  • 1

= 13 TeV , 36.1 fb s SR: resolved topology 0 leptons, 2 b-tags

200 400 600 800 1000 1200 1400

[GeV]

miss T

E

0.5 1 1.5

Data/SM

100 200 300 400 500 600 700 1000

[GeV]

miss T

E

0.6 0.8 1 1.2 1.4 1.6

Data / SM

3 −

10

2 −

10

1 −

10 1 10

2

10

3

10

[Events/GeV]

miss T

dN/dE Data Non-resonant ll ZZ Z+jets WZ Others Stat.+Syst.

=250 GeV)

a

=600 GeV, m

H

2HDM+a (m =100 GeV)

χ

=500 GeV, m

A Z

AV (m

Preliminary ATLAS

  • 1

= 13 TeV, 36.1 fb s

miss T

)+E µ µ Z(

100 200 300 400 500 600 700 1000

[GeV]

miss T

E

0.6 0.8 1 1.2 1.4 1.6

Data / SM

3 −

10

2 −

10

1 −

10 1 10

2

10

3

10

[Events/GeV]

miss T

dN/dE Data Non-resonant ll ZZ Z+jets WZ Others Stat.+Syst.

=250 GeV)

a

=600 GeV, m

H

2HDM+a (m =100 GeV)

χ

=500 GeV, m

A Z

AV (m

Preliminary ATLAS

  • 1

= 13 TeV, 36.1 fb s

miss T

Z(ee)+E

Resolved and Merged analyses defined. ET

miss + 2 leptons

selection, final limits from binned fit to ET

miss.

slide-9
SLIDE 9

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

2HDM HDM + + Z’

9

ATLAS Et

miss+H(bb) analysis improved by

the use of variable-radius jets (compared to fixed-radius jets used previously).

  • Both collaborations have results for ET

miss +

H(γγ) with better sensitivity at low mZ’.

  • CMS also includes results from ET

miss +

H(ττ) covering the ~medium mediator mass region.

ET

miss+H(γγ)

ET

miss+H(ττ)

500 1000 1500 2000 2500 3000 3500 [GeV]

V

Z'

m 200 300 400 500 600 700 800 900 1000 1100 1200 [GeV]

A

m

h

  • m

V

Z'

= m

A

m

  • bserved

miss T

h+E σ 1 ± expected

miss T

h+E expected

miss T

)+E b h(b PRL 119 (2017) 181804 expected

miss T

)+E γ γ h( PRD 96 (2017) 112004

ATLAS Preliminary

  • 1

= 13 TeV, 36.1 fb s All limits at 95 % CL , Dirac DM

V

2HDM+Z' = 100 GeV

χ

= 0.8, m

V

Z'

= 1, g β tan = 300 GeV

±

H

= m

H

m

300 400 500 600 700 800 900 200 250 300 350 400 450 500

With 2017 data! Combination

ATLAS-CONF-2018-039 CMS-PAS-EXO-16-050 JHEP 09 (2018) 046

slide-10
SLIDE 10

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

2HDM HDM + + a

10

ATLAS-CONF-2018-52 CMS-PAS-16-050 100 150 200 250 300 350 400

[GeV]

a

m

200 400 600 800 1000 1200 1400 1600 1800 2000

[GeV]

A

m

Preliminary ATLAS

  • 1

, 36.1 fb = 13 TeV s

Limits at 95% CL Observed Expected

2HDM+a, Dirac DM = 1

χ

= 10 GeV, g

χ

m = 1 β = 0.35, tan θ sin

± H

= m

H

= m

A

m

= 600 GeV

A

m

h

+ m

a

= m

A

m

a

= m

A

m > 20%

a

/m Γ PLB 776 (2017) 318

+Z(ll)

miss T

E

PRL 119 (2017) 181804

) b +h(b

miss T

E

PRD 96 (2017) 112004

) γ γ +h(

miss T

E

arXiv:1807.11471

) q +Z(q

miss T

E

JHEP 11 (2015) 206,

  • 1

=7,8 TeV;4.7,20.3 fb s

h(inv)

200 400 600 800 1000 1200 1400 1600

mA (GeV)

0.1 1 10 100

95% C.L. asymptotic limit on µ = σ/σtheory

CMS Preliminary

35.9 fb−1 (13 TeV)

2HDM+a, h → bb sin θ = 0.35, tan β = 1.0, mχ = 10 GeV, mA = mH = mH±

solid (dashed) lines: observed (expected) limit

  • unc. band: ±1 std. dev. on exp. limit

±20% theory uncertainty

ma = 150 GeV ma = 250 GeV ma = 300 GeV ma = 350 GeV ma = 400 GeV ma = 500 GeV

First LHC results for this model.

Assuming tanß=1 and sinθ=0.35, scanning the masses of A and a. Exclusion sensitivity dominated by ET

miss+Z(ll) and ET miss+H(bb).

h(invisible) BR limits used to constrain very low values of ma, being only sensitive to the a boson production cross section.

slide-11
SLIDE 11

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

2HDM HDM + + a

11

ATLAS-CONF-2018-52 CMS-PAS-16-050 100 150 200 250 300 350 400 450 500 550

[GeV]

a

m

1

β tan

Preliminary ATLAS

  • 1

, 36.1 fb = 13 TeV s

Limits at 95% CL Observed Expected

2HDM+a, Dirac DM = 1

χ

= 10 GeV, g

χ

m = 0.35 θ sin = 600 GeV

± H

= m

H

= m

A

m

= 1 β tan > 20%

a

/m Γ JHEP 09 (2017) 088

t t t t

PLB 776 (2017) 318

+Z(ll)

miss T

E

PRL 119 (2017) 181804

) b +h(b

miss T

E

PRD 96 (2017) 112004

) γ γ +h(

miss T

E t +t

miss T

E

EPJC 78 (2018) 18 JHEP 06 (2018) 108 JHEP 11 (2015) 206,

  • 1

=7,8 TeV;4.7,20.3 fb s

h(inv)

0.5 1 2 4 8 20 50

tan β

0.1 1 10 100

95% C.L. asymptotic limit on µ = σ/σtheory

CMS Preliminary

35.9 fb−1 (13 TeV)

2HDM+a, h → bb sin θ = 0.35, mχ = 10 GeV, mA = mH = mH± = 600 GeV

solid (dashed) lines: observed (expected) limit

  • unc. band: ±1 std. dev. on exp. limit

±20% theory uncertainty

ma = 100 GeV ma = 150 GeV ma = 200 GeV ma = 250 GeV ma = 300 GeV

Using 2015+2016 data results in ATLAS.

*Only gg fusion production considered in this ATLAS plot.

ET

miss+H(bb)

Parameter chosen to have H and Z produced resonantly, dominating exclusion at low ma.

arXiv: 1701.07427

Interplay between gg fusion and bb annihilation production along tanß.

slide-12
SLIDE 12

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

2HDM HDM + + a

12

ATLAS-CONF-2018-52 CMS-PAS-16-050

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

θ sin

1 10

2

10

theory

σ / σ

Preliminary ATLAS

  • 1

, 36.1 fb = 13 TeV s

Limits at 95% CL Observed Expected

2HDM+a, Dirac DM = 1

χ

= 10 GeV, g

χ

m = 350 GeV

a

m = 1 TeV

±

H

= m

H

= m

A

m t t t = 0.5: t β tan = 1: all others β tan t +t

miss T

E

EPJC 78 (2018) 18 JHEP 06 (2018) 108 EPJC 78 (2018) 18

b +b

miss T

E

PRL 119 (2017) 181804

) b +h(b

miss T

E

PRD 96 (2017) 112004

) γ γ +h(

miss T

E

PLB 776 (2017) 318

+Z(ll)

miss T

E

arXiv:1807.11471

) q +Z(q

miss T

E

JHEP 09 (2017) 088

t t t t

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

θ sin

1 −

10 1 10

2

10

theory

σ / σ

Preliminary ATLAS

  • 1

, 36.1 fb = 13 TeV s

Limits at 95% CL Observed Expected

2HDM+a, Dirac DM = 1

χ

= 10 GeV, g

χ

m = 200 GeV

a

m = 600 GeV

±

H

= m

H

= m

A

m b +b

miss T

= 50: E β tan t t t , t t +t

miss T

= 0.5: E β tan = 1: all others β tan t +t

miss T

E

EPJC 78 (2018) 18 JHEP 06 (2018) 108 EPJC 78 (2018) 18

b +b

miss T

E

PRL 119 (2017) 181804

) b +h(b

miss T

E

PRD 96 (2017) 112004

) γ γ +h(

miss T

E

PLB 776 (2017) 318

+Z(ll)

miss T

E

arXiv:1807.11471

) q +Z(q

miss T

E

JHEP 09 (2017) 088

t t t t 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

sin θ

0.1 1 10 100

95% C.L. asymptotic limit on µ = σ/σtheory

CMS Preliminary

35.9 fb−1 (13 TeV)

2HDM+a, h → bb tan β = 1.0, mχ = 10 GeV, mA = mH = mH±

solid (dashed) lines: observed (expected) limit

  • unc. band: ±1 std. dev. on exp. limit

±20% theory uncertainty

ma = 200 GeV, mA = 600 GeV ma = 350 GeV, mA = 1000 GeV

Exploring mixing angle sinθ

  • The production diagrams for ET

miss+h

have different dependence on the mixing angle (low and high ma assumptions).

  • The sensitivity of ET

miss+Z analyses

improves as a function of sinθ.

  • Other signatures presented for

different tanß assumptions.

slide-13
SLIDE 13

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

2HDM HDM + + a

13

ATLAS-CONF-2018-51

50 100 150 200 250 300 350 400 450

[GeV]

χ

m

1 −

10 1 10

2

10

3

10

4

10

5

10

6

10

7

10

8

10

theory

σ / σ

Preliminary ATLAS

  • 1

, 36.1 fb = 13 TeV s 2HDM+a, Dirac DM

= 1

χ

= 0.35, g θ sin = 250 GeV

a

m = 600 GeV

±

H

= m

H

= m

A

m

Limits at 95% CL Observed Expected

= 0.12

2

h Ω Thermal Relic =1

theory

σ / σ

a

= 0.5*m

χ

m EPJC 78 (2018) 18

b +b

miss T

E

PRL 119 (2017) 181804

) b +h(b

miss T

E

PRD 96 (2017) 112004

) γ γ +h(

miss T

E

PLB 776 (2017) 318

+Z(ll)

miss T

E

arXiv:1807.11471

) q +Z(q

miss T

E relic density

5 −

10

4 −

10

3 −

10

2 −

10

1 −

10 1 10

2

10

3

10

4

10 Thermal Relic Density

Relic density predicted by 2HDM+a has a strong dependence on mχ. Two a-funnel and A-funnel regions at mχ=125 GeV and mχ=300 GeV, respectively (relic density depleted by the resonant enhancement of χχàA/aàSM).

slide-14
SLIDE 14

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

SUSY-inspired ed model dels

14

Superpartner for every SM particle.

  • Spin differs by one half.
  • Mostly heavier than SM

partners [broken symmetry]. While SM does not have a viable DM candidate, in SUSY if R-parity is conserved, lightest SUSY particle (LSP) is stable à Good candidate for Dark Matter.

Standard d Model del SU SUSY

arXivL1608.05379

slide-15
SLIDE 15

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

SUSY-inspired ed model dels

15

Electroweak sector B (bino), W (wino), H (higgsino) ~ ~ ~

Well-tempered neutralino SUSY model may provide a viable DM candidate, while addressing the problem

  • f naturalness by targeting an LSP which is an

admixture of bino and higgsino.

JHEP 12 (2017) 085 JHEP 06 (2018) 108

  • Some models can give a relic density

consistent with measurements.

  • Pure higgsino obtains relic density

for masses 1TeV.

  • Pure wino obtains right relic density

for masses 2.5 TeV

  • Bino/higgsino mix mode may satisfy

the SM higgs mass and the DM relic density: 0.10 < Ωh2 < 0.12.

slide-16
SLIDE 16

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

SUSY-inspired ed model dels

[GeV]

1 ±

χ ∼

= m

2

χ ∼

m

100 200 300 400 500 600

[GeV]

1

χ ∼

m

50 100 150 200 250 300 350

2

χ ∼

1 ±

χ ∼ → pp

(13 TeV)

  • 1

35.9 fb

CMS

1

χ ∼

= m

1 ±

χ ∼

m

Z

+m

1

χ ∼

= m

1 ±

χ ∼

m

H

+m

1

χ ∼

= m

1 ±

χ ∼

m Expected Observed

≥ 3ℓ (WH) 2ℓ on-Z (WZ) 1ℓ 2b (WH) 2ℓ soft (WZ) H → γγ (WH) 3ℓ (WZ)

JHEP 03 (2018) 160 CMS public page

16

200 400 600 800 1000 1200

[GeV]

L/R

µ ∼

=m

L/R

e ~

  • r m

1 ±

χ ∼

=m

2

χ ∼

m

200 400 600 800 1000 1200 1400

[GeV]

1

χ ∼

m

CMS

l ~ l ~ → , pp

1

  • χ

∼

1 +

χ ∼ → , pp

1 ±

χ ∼

2

χ ∼ → pp

July 2018

(13 TeV)

  • 1

35.9 fb

1

χ ∼

= m

1 ±

χ ∼

m

Z

+m

1

χ ∼

= m

1 ±

χ ∼

m

H

+m

1

χ ∼

= m

1 ±

χ ∼

m

Expected Observed =0.5)

l

, BF(ll)=0.5, x l ~ l ν ∼ l →

2

χ ∼

1 ±

χ ∼ 1709.05406, 3l ( =0.5)

l

, x l ~ l ν τ ∼ →

2

χ ∼

1 ±

χ ∼ 1709.05406, 3l ( =0.5)

l

, x τ ∼ τ ν τ ∼ →

2

χ ∼

1 ±

χ ∼

  • comb. (

τ 1807.02048, 2 =0.5)

l

, x l ~ ν ν ∼ l →

1

  • χ

∼

1 +

χ ∼ 1807.07799, 2l OS ( =0.5)

l

, x τ ∼ ν ν ∼ τ →

1

  • χ

∼

1 +

χ ∼

  • comb. (

τ 1807.02048, 2 )

1

χ ∼

1

χ ∼ WZ →

2

χ ∼

1 ±

χ ∼ 1801.03957, comb. ( )

1

χ ∼

1

χ ∼ WH →

2

χ ∼

1 ±

χ ∼ 1801.03957, comb. ( )

L/R

µ ∼

L/R

µ ∼ ,

L/R

e ~

L/R

e ~ 1806.05264, 2l OS (

Production of pairs of the lightest chargino and the second-lightest neutralino, of chargino pairs, and of slepton pairs.

slide-17
SLIDE 17

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

SUSY-inspired ed model dels

ATLAS SUSY Public

17

In GMSB scenarios the gravitino is

  • ften the LSP, thus a DM candidate.
slide-18
SLIDE 18

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

Conc Conclusions

  • ns

18

  • Exciting new results from ATLAS and CMS collaborations!
  • Introduced simplified models for interpretation of Dark Matter

searches In Run 2.

  • Now: new generation of UV complete models being explored.
  • SUSY naturally includes a DM candidate.
  • New 2HDM+a model probed with 2015+2016 data… improved sensitivity

expected for full LHC run 2 dataset.

  • This model highlights complementarity between different signatures,

both ET

miss+X and resonance searches.

  • Great prospects for future exploration of the parameters space.
  • Stay tuned for future advancements in DM searches.
slide-19
SLIDE 19

Thank you!

slide-20
SLIDE 20

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

2HDM HDM + + a

20

ATLAS-CONF-2017-32

50 100 150 200 250 300 350 400 450

[GeV]

χ

m

1 −

10 1 10

2

10

3

10

4

10

5

10

6

10

7

10

8

10

theory

σ / σ

Preliminary ATLAS

  • 1

, 36.1 fb = 13 TeV s 2HDM+a, Dirac DM

= 1

χ

= 0.35, g θ sin = 250 GeV

a

m = 600 GeV

±

H

= m

H

= m

A

m

Limits at 95% CL Observed Expected

= 0.12

2

h Ω Thermal Relic =1

theory

σ / σ

a

= 0.5*m

χ

m EPJC 78 (2018) 18

b +b

miss T

E

PRL 119 (2017) 181804

) b +h(b

miss T

E

PRD 96 (2017) 112004

) γ γ +h(

miss T

E

PLB 776 (2017) 318

+Z(ll)

miss T

E

arXiv:1807.11471

) q +Z(q

miss T

E relic density

5 −

10

4 −

10

3 −

10

2 −

10

1 −

10 1 10

2

10

3

10

4

10 Thermal Relic Density

Relic density has a strong dependence on mχ. Two φp-funnel and A-funnel regions at mχ=125 GeV and mχ=300 GeV, respectively (relic density depleted by the resonant enhancement of χχàA/aàSM).

mχ = ma/2 mχ = mt mχ = (ma+mh)/2 mχ = mA/2 mχ = (mA+mh)/2

slide-21
SLIDE 21

The puzzle of dark matter 29.10.18 Arely Cortes Gonzalez

2HDM HDM + + a

21

ATLAS-CONF-2017-32

  • Production cross-section for the lightest pseudo scalar, a, is dominated by loop-induced

gluon fusion, associated production with HF quarks or Higgs/Z-boson.

  • Higgs/Z-bosons can be produced in resonant decay of the heavier bosons into the lightest

pseudo-scalar.

  • A can then decay into a pair of DM or SM particles (dominantly top quarks if

kinematically allowed.