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Scalar Dark Matter and the Higgs Portal. M.J. Ramsey-Musolf Wisconsin-Madison. NPAC. Theoretical Nuclear, Particle, Astrophysics & Cosmology. http://www.physics.wisc.edu/groups/particle-theory/. SSNuDM, Shanghai, September 2012. Outline. Dark Matter Portals Why the Higgs portal?

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Scalar dark matter and the higgs portal

Scalar Dark Matter and the Higgs Portal

M.J. Ramsey-Musolf

Wisconsin-Madison

NPAC

Theoretical Nuclear, Particle, Astrophysics & Cosmology

http://www.physics.wisc.edu/groups/particle-theory/

SSNuDM, Shanghai, September 2012


Outline
Outline

Dark Matter Portals

Why the Higgs portal?

Why scalar dark matter ?

Simplest examples: scalar DM & LHC

Long-range dark forces

  • Supersymmetry as an illustration

  • Theoretical progress & challenges

  • Our work


I dark matter portals

Standard Model

Hidden Sector (DM)

I. Dark Matter Portals


Bsm physics eft framework
BSM Physics: EFT Framework

Thanks: Adam Ritz

EFT: Integrate out heavy DOF & retain only light DOF w/ M << 


Portals
Portals

Thanks: Adam Ritz


Classifying portals

“dark photons”

Classifying Portals

Thanks: Adam Ritz


Classifying portals1

Mediator mass

Classifying Portals

! scalar DM

! fermionic DM

Thanks: Adam Ritz


Classifying portals2
Classifying Portals

Thanks: Adam Ritz


Ii why the higgs portal
II. Why the Higgs Portal ?




Sm higgs

LHC Observation

LHC Exclusion

LEP, Tevatron, & ATLAS Exclusion

Non-SM Higgs(es) ?

SM Higgs properties ?

SM Higgs?

  • SM “background” well below new CPV expectations

  • New expts: 102 to 103 more sensitive

  • CPV needed for BAU?

Precision Tests


Scalar fields in particle physics

Scalar fields are theoretically problematic

m2 ~ 2

Scalar Fields in Particle Physics

Scalar fields are a simple

Has a fundamental scalar finally been discovered ?

If so, is it telling us anything about  ?


What is the bsm energy scale

Remarkable agreement with EWPO

Tension: EWPO + Direct Searches

EWPO: data favor a “light” SM-like Higgs scalar

What is the BSM Energy Scale  ?


What is the bsm energy scale1

Remarkable agreement with EWPO

Agreement w/ SM at ~ 10-3 level:ONP = c / 2

Barbieri & Strumia ‘99

~ 10 TeV generically

What is the BSM Energy Scale  ?


Scalar fields in particle physics1

Scalar fields are theoretically problematic

m2 ~ 2

Scalar Fields in Particle Physics

Scalar fields are a simple

Must BSM ~ TeV to maintain a weak scale scalar ?

EWPO: for new interactions coupling to gauge bosons or fermions, BSM >> TeV


Scalar fields in particle physics2

Scalar fields are theoretically problematic

m2 ~ 2

Scalar Fields in Particle Physics

Scalar fields are a simple

Must BSM ~ TeV to maintain a weak scale scalar ?


Scalar fields in particle physics3

Scalar fields are theoretically problematic

m2 ~ 2

Scalar Fields in Particle Physics

Scalar fields are a simple

Must BSM ~ TeV to maintain a weak scale scalar ?

Perhaps new weak scale physics couples only to scalar sector: “Higgs portal”


Iii why scalar dark matter



?

III. Why scalar dark matter ?



Scalar fields in cosmology
Scalar Fields in Cosmology

What role do scalar fields play (if any) in the physics of the early universe ?


Scalar fields in cosmology1

Problem

Theory

Exp’t

Scalar Fields in Cosmology

  • Inflation

  • Dark Energy

  • Dark Matter

  • Phase transitions


Symmetries cosmic history

EW Symmetry Breaking: Higgs ?

QCD: q+g! n,p…

Astro: stars, galaxies,..

New Forces ?

Standard Model Universe

QCD: n+p! nuclei

Symmetries & Cosmic History


Symmetries cosmic history1

EW Symmetry Breaking: Higgs ?

New Forces ?

Standard Model Universe

SUSY ?

GUTS ?

Extra Dims ?

~

WL

Terascale

Symmetries & Cosmic History

WR

NR

WL*

Puzzles the Standard Model can’t solve

Origin of matter

Unification & gravity

Weak scale stability

Neutrinos


Scalar fields inflation

EW Symmetry Breaking: Higgs ?

QCD: q+g! n,p…

Astro: stars, galaxies,..

New Scalars ?

Standard Model Universe

  • Flatness

  • Isotropy

  • Homogeneity

Scalar Field: Inflaton

Reheat

“Slow roll”

QCD: n+p! nuclei

Scalar Fields & Inflation


Scalar fields dark energy

  • CDM

  • Supernovae

  • BAO

Cosmological constant ?

> 0

Scalar Field: Quintessence ?

Scalar Fields & Dark Energy

?


Scalar fields the origin of matter

Baryogenesis: When? CPV? SUSY? Neutrinos? Non-equilibrium dynamics or CPT violation?

Scalar Fields & the Origin of Matter

?


Scalar fields the origin of matter1

Baryogenesis: When? CPV? SUSY? Neutrinos? dynamics or CPT violation? Non-equilibrium dynamics or CPT violation?

Electroweak Phase Transition ? New Scalars

Scalar Fields & the Origin of Matter

?


Scalar fields the origin of matter2

Baryogenesis: When? CPV? SUSY? Neutrinos? dynamics or CPT violation? Non-equilibrium dynamics or CPT violation?

Electroweak Phase Transition ? New Scalars

  • Rotation curves

  • Lensing

  • Bullet clusters

Darkogenesis: When? SUSY? Neutrinos? Axions ? YB related ?

Scalar Fields & the Origin of Matter

?

?


Scalar fields the origin of matter3

Baryogenesis: When? CPV? SUSY? Neutrinos? dynamics or CPT violation? Non-equilibrium dynamics or CPT violation?

Electroweak Phase Transition ? New Scalars: CDM ?

  • Rotation curves

  • Lensing

  • Bullet clusters

Darkogenesis: When? SUSY? Neutrinos? Axions ? YB related ?

Scalar Fields & the Origin of Matter

?

?


Scalar fields in cosmology2

dynamics or CPT violation?

?

?

?

?

Scalar Fields in Cosmology

Problem

Theory

Exp’t

  • Inflation

  • Dark Energy

  • Dark Matter

  • Phase transitions


Scalar fields in cosmology3

Problem dynamics or CPT violation?

Theory

Exp’t

  • Inflation

  • Dark Energy

  • Dark Matter

  • Phase transitions

?

?

?

?

Scalar Fields in Cosmology

Could experimental discovery of a fundamental scalar point to early universe scalar field dynamics?


Scalar fields in cosmology4
Scalar Fields in Cosmology dynamics or CPT violation?

Problem

Theory

Exp’t

  • Inflation

  • Dark Energy

  • Dark Matter

  • Phase transitions

?

?

?

?

Focus of this talk, but perhaps part of larger role of scalar fields in early universe


Electroweak phase transition
Electroweak Phase Transition dynamics or CPT violation?


Ew phase transition new scalars

1st order dynamics or CPT violation?

2nd order

Increasingmh

New scalars

EW Phase Transition: New Scalars


Ew phase transition new scalars1

1st order dynamics or CPT violation?

2nd order

Increasingmh

Baryogenesis Gravity Waves Scalar DM LHC Searches

EW Phase Transition: New Scalars

New scalars


Ew phase transition new scalars2

1st order dynamics or CPT violation?

2nd order

Increasingmh

Baryogenesis Gravity Waves Scalar DM LHC Searches

EW Phase Transition: New Scalars

“Strong” 1st order EWPT

New scalars


Ew phase transition new scalars3

1st order dynamics or CPT violation?

2nd order

Increasingmh

Bubble nucleation

EWSB

Baryogenesis Gravity Waves Scalar DM LHC Searches

EW Phase Transition: New Scalars

“Strong” 1st order EWPT

New scalars


Ew phase transition new scalars4

1st order dynamics or CPT violation?

2nd order

Increasingmh

Bubble nucleation

Baryogenesis Gravity Waves Scalar DM LHC Searches

EW Phase Transition: New Scalars

“Strong” 1st order EWPT

New scalars

YB : CPV & EW sphalerons

EWSB


Ew phase transition new scalars5

1st order dynamics or CPT violation?

2nd order

Increasingmh

Bubble nucleation

Baryogenesis Gravity Waves Scalar DM LHC Searches

EW Phase Transition: New Scalars

“Strong” 1st order EWPT

New scalars

YB : diffuses into interiors

EWSB


Ew phase transition new scalars6

1st order dynamics or CPT violation?

2nd order

Increasingmh

Preserve YBinitial

Bubble nucleation

Baryogenesis Gravity Waves Scalar DM LHC Searches

EW Phase Transition: New Scalars

“Strong” 1st order EWPT

Quench EW sph

New scalars

YB : diffuses into interiors

EWSB

TC , Esph, Stunnel

F()


Ew phase transition new scalars7

1st order dynamics or CPT violation?

2nd order

Increasingmh

Bubble nucleation

BaryogenesisGravity Waves Scalar DM LHC Searches

EW Phase Transition: New Scalars

“Strong” 1st order EWPT

Detonation & turbulence

nMSSM

New scalars

EWSB

Q

tEW

GW Spectra: Q & tEW

F()


Ew phase transition new scalars8

1st order dynamics or CPT violation?

2nd order

Increasingmh

Bubble nucleation

BaryogenesisGravity Waves Scalar DM LHC Searches

EW Phase Transition: New Scalars

“Strong” 1st order EWPT

Detonation & turbulence

New scalars

EWSB

GW Spectra: Q & tEW

F()


Ew phase transition new scalars9

1st order dynamics or CPT violation?

2nd order

Detonation & turbulence

Increasingmh

Bubble nucleation

EWSB

BaryogenesisGravity Waves Scalar DM LHC Searches

EW Phase Transition: New Scalars

“Strong” 1st order EWPT

New scalars


Ew phase transition new scalars10

1st order dynamics or CPT violation?

2nd order

Increasingmh

Bubble nucleation

BaryogenesisGravity WavesScalar DM ? LHC Searches ?

EW Phase Transition: New Scalars

“Strong” 1st order EWPT

YB preservation, detonation & turbulence

New scalars

EWSB

TC , Esph, Stunnel

Q & tEW

F()


Dark matter si

Thermal DM: WIMP dynamics or CPT violation?

Direct detection: Spin-indep DM-nucleus scattering

A

SM

A

SM

Dark Matter:  & SI

?


Iv simple examples
IV. dynamics or CPT violation? Simple examples


Higgs portal simple scalar extensions

Extension dynamics or CPT violation?

DOF

EWPT

DM

1

1

2

?

3

Higgs Portal: Simple Scalar Extensions

Real singlet

Real singlet

Complex Singlet

Real Triplet

May be low-energy remnants of UV complete theory & illustrative of generic features


The simplest extension

Stable S (dark matter?) dynamics or CPT violation?

  • Tree-level Z2 symmetry: a1=b3=0 to prevent s-h mixing and one-loop s hh

  • x0 =0 to prevent h-s mixing

Mass matrix

H-S Mixing

H1 !H2H2

EWPT: a1,2 = 0 & <S> = 0

DM: a1 = 0 & <S> = 0

/

/

Signal Reduction Factor

Independent Parameters:

v0, x0, l0, a1, a2, b3, b4

xSM EWPT:

Production

Decay

The Simplest Extension

Model

Simplest extension of the SM scalar sector: add one real scalar S (SM singlet)

O’Connel, R-M, Wise; Profumo, R-M, Shaugnessy; Barger, Langacker, McCaskey, R-M Shaugnessy; He, Li, Li, Tandean, Tsai; Petraki & Kusenko; Gonderinger, Li, Patel, R-M; Cline, Laporte, Yamashita; Ham, Jeong, Oh; Espinosa, Quiros; Konstandin & Ashoorioon…


The simplest extension cont d

Stable S (dark matter?) dynamics or CPT violation?

  • Tree-level Z2 symmetry: a1=0 to prevent s-h mixing and one-loop s hh

  • x0 =0 to prevent h-s mixing & s ! hh

h

S

h

x0 = <S>

h1,2

The Simplest Extension, Cont’d

Mass matrix


The simplest extension1

Stable S (dark matter?) dynamics or CPT violation?

  • Tree-level Z2 symmetry: a1=b3=0 to prevent s-h mixing and one-loop s hh

  • x0 =0 to prevent h-s mixing

Mass matrix

H-S Mixing

H1 !H2H2

Signal Reduction Factor

xSM EWPT:

Production

Decay

The Simplest Extension

Model

DM Scenario


Hw question 1
HW Question 1 dynamics or CPT violation?

Consider the real singlet extension: explain why the presence of an operator S3in addition to H+H S2 would imply that S can decay to Standard Model particles


The simplest extension2

Stable S (dark matter?) dynamics or CPT violation?

  • Tree-level Z2 symmetry: a1=b3=0 to prevent s-h mixing and one-loop s hh

  • x0 =0 to prevent h-s mixing

Mass matrix

H-S Mixing

H1 !H2H2

DM & SI

Signal Reduction Factor

Independent Parameters:

v0, x0, l0, a1, a2, b3, b4

+

+…

xSM EWPT:

Production

Decay

The Simplest Extension

Model

DM Scenario


Dm phenomenology

Relic Density dynamics or CPT violation?

-

S

f

He, Li, Li, Tandean, Tsai

Higgs pole

H

S

f

Direct Detection

Barger, Langacker, McCaskey, R-M, Shaugnessy

He, Li, Li, Tandean, Tsai

DM Phenomenology


Lhc higgs phenomenology

LHC discovery potential dynamics or CPT violation?

V1j < 1: mixed states hj

New decays: h2! h1 h1

Signal Reduction Factor

Dark matter: no mixing ! states are h,S

New decays h! SS (invisible!) possible

Production

Decay

LHC & Higgs Phenomenology


Lhc higgs phenomenology1

Invisible decays dynamics or CPT violation?

LHC discovery potential

He, Li, Li, Tandean, Tsai

Dijet azimuthal distribution

Invis search

(h!SS)=0

Signal Reduction Factor

Look for azimuthal shape change of primary jets (Eboli & Zeppenfeld ‘00)

Production

Decay

LHC & Higgs Phenomenology


Lhc higgs phenomenology2

Invisible decays dynamics or CPT violation?

LHC discovery potential

He, Li, Li, Tandean, Tsai

Dijet azimuthal distribution

Signal Reduction Factor

Jets + ET

Look for azimuthal shape change of primary jets (Eboli & Zeppenfeld ‘00)

Production

Decay

LHC & Higgs Phenomenology


Vbf invisible search i

dynamics or CPT violation?

Central Jet Veto

“Lego plot”

H ! W+W-! l+ l- :central region minijet from SM bcknd, separation from dilepton pair (Barger, Phillips, Zeppenfeld ‘94)

VBF: Invisible Search I

H ! W+W-! jj : ideally only W decay products in central region (Chehime & Zeppenfeld ‘93)


Vbf invisible search ii

dynamics or CPT violation?

pT (H) distribution

Dijet azimuthal distribution

VBF + Invis decay

SM bcknd

Cahn et al ‘87

Look for azimuthal shape change of primary jets (Eboli & Zeppenfeld ‘00)

Large pT (invisible decay)

VBF: Invisible Search II


Lhc higgs phenomenology3

Invisible decays dynamics or CPT violation?

LHC discovery potential

He, Li, Li, Tandean, Tsai

ATLAS

Dijet azimuthal distribution

Signal Reduction Factor

Look for azimuthal shape change of primary jets (Eboli & Zeppenfeld ‘00)

Production

Decay

LHC & Higgs Phenomenology


Lhc higgs phenomenology4
LHC & Higgs Phenomenology dynamics or CPT violation?

Giardino et al:

arXiv 1207:1347


Higgs portal simple scalar extensions1

Extension dynamics or CPT violation?

DOF

EWPT

DM

1

1

2

?

3

Higgs Portal: Simple Scalar Extensions

Real singlet

Real singlet

Complex Singlet

Real Triplet

May be low-energy remnants of UV complete theory & illustrative of generic features


Complex singlet ewb dm

< S > = 0 dynamics or CPT violation?

Complex Singlet: EWB & DM?

Barger, Langacker, McCaskey, R-M Shaugnessy

Spontaneously & softly broken global U(1)

Controls CDM , TC , & H-S mixing

Gives non-zero MA


Complex singlet ewb dm1
Complex Singlet: EWB & DM? dynamics or CPT violation?

Barger, Langacker, McCaskey, R-M Shaugnessy

Consequences:

Three scalars:

h1 , h2 : mixtures of h & S

A : dark matter

Phenomenology:

  • Produce h1 , h2 w/ reduced 

  • Reduce BR (hj! SM)

  • Observation of BR (invis)

  • Possible obs of SI


Complex singlet ewb dm2
Complex Singlet: EWB & DM dynamics or CPT violation?

Barger, Langacker, McCaskey, R-M, Shaugnessy

2 controls CDM& EWPT

decreasing TC

MH1 = 120 GeV, MH2=250 GeV, x0=100 GeV


Complex singlet direct detection
Complex Singlet: Direct Detection dynamics or CPT violation?

Barger, Langacker, McCaskey, R-M, Shaugnessy

Two component case (x0=0)

Little sensitivity of scaled SI to 


Hw question 2
HW Question 2 dynamics or CPT violation?

Explain why the scaled direct detection cross section is insensitive to the value of the coupling 2


Complex singlet lhc discovery

Single component case (x dynamics or CPT violation? 0 = 0)

EWPT

Complex Singlet: LHC Discovery

Barger, Langacker, McCaskey, R-M, Shaugnessy

Traditional search: CMS

Invisible search: ATLAS


Sm higgs1

SM Branching Ratios ? dynamics or CPT violation?

D

D

D

D

  • TH < WMAP

  • Xenon

  • Br(inv) > 0.6

2nd light state

Viable Dark Matter ?

He et al

EWPT

WIMP-Nucleus Scattering

Gonderinger, Lim, R-M

Barger, Langacker, McCaskey, RM, Shaugnessy

LHC: WBF “Invisible decay” search

SM Higgs?

Three scalars: h1,2 (Higgs-like) D (dark matter)


Higgs portal simple scalar extensions2

Extension dynamics or CPT violation?

DOF

EWPT

DM

1

1

2

?

3

Higgs Portal: Simple Scalar Extensions

Real singlet

Real singlet

Complex Singlet

Real Triplet

May be low-energy remnants of UV complete theory & illustrative of generic features


Real triplet

S dynamics or CPT violation? 0 , S+, S-

EWPT: a1,2 = 0 & <> = 0

DM & EWPT: a1 = 0 & <> = 0

/

/

Real Triplet

Fileviez-Perez, Patel, Wang, R-M: PRD 79: 055024 (2009); 0811.3957 [hep-ph]

~ ( 1, 3, 0 )


Real triplet1

S dynamics or CPT violation? 0 , S+, S-

EWPT: a1,2 = 0 & <> = 0

DM & EWPT: a1 = 0 & <> = 0

/

/

Small: -param

Real Triplet

Fileviez-Perez, Patel, Wang, R-M: 0811.3957 [hep-ph]

~ ( 1, 3, 0 )


Real triplet2

S dynamics or CPT violation? 0 , S+, S-

EWPT: a1,2 = 0 & <> = 0

DM & EWPT: a1 = 0 & <> = 0

/

/

Real Triplet

Fileviez-Perez, Patel, Wang, R-M: 0811.3957 [hep-ph]

~ ( 1, 3, 0 )

Small: -param


Hw question 3
HW Question 3 dynamics or CPT violation?

Consider the real triplet extension in which there is no H0 - mixing: explain why cannot decay to Standard Model fermions, unlike the H0


Real triplet3

S dynamics or CPT violation? 0 , S+, S-

gZ / 2 I3 - 4 Q sin2W

Y = 2 ( Q - I3 )

Want Y = 0

Real Triplet

Fileviez-Perez, Patel, Wang, R-M: 0811.3957 [hep-ph]

~ ( 1, 3, 0 )

New feature: gauge interactions & direct detection


Real triplet4

S dynamics or CPT violation? 0 , S+, S-

q

q





Z 0

W +

q



q



EW cross sections w/ charged states + ET

Real Triplet

Fileviez-Perez, Patel, Wang, R-M: 0811.3957 [hep-ph]

~ ( 1, 3, 0 )

New feature: gauge interactions & LHC production


Lhc phenomenology

D

D

D

D

LHC Phenomenology

SM Branching Ratios ?

Four scalars: h1 (Higgs-like)  (dark matter) (new states)

LEP: M > 100 GeV ! BR(invis) = 0

Fileviez-Perez, Patel, R-M, Wang


Real triplet charged brs

Pure gauge dynamics or CPT violation?

x0 supressed

Real Triplet : Charged BRs

Charged: x0 dependence

Below WZ Threshold

Above WZ Threshold


Real triplet dm search

Cirelli et al: dynamics or CPT violation?

Trigger: Monojet (ISR) + large ET

Cuts: large ET hard jet One 5cm track

M= 500 GeV:

CDM ~ 0.1

Real Triplet : DM Search

Basic signature: Charged track disappearing after ~ 5 cm

SM Background: QCD jZ and jW w/ Z !& W!l


Sm higgs2

D dynamics or CPT violation?

D



D

D



SM Higgs?

  • SM “background” well below new CPV expectations

  • New expts: 102 to 103 more sensitive

  • CPV needed for BAU?

SM Branching Ratios ?

Four scalars: h1 (Higgs-like)  (dark matter) (new states)

Fileviez-Perez, Patel, R-M, Wang


Real triplet h 1 decays
Real Triplet : H dynamics or CPT violation? 1 Decays

Neutral SM-like Higgs: H+ loops and BR ( H1!)

X0=0: DM case

X0>0: EWPT case


Sm higgs3

D dynamics or CPT violation?

D



D

D



SM Higgs?

  • SM “background” well below new CPV expectations

  • New expts: 102 to 103 more sensitive

  • CPV needed for BAU?

LHC: H ! 


Is it a scalar

1 dynamics or CPT violation?

1

2

3

Is it a Scalar ?

Extension

DOF

EWPT

DM

Real singlet

Real singlet

Complex Singlet

Real Triplet

?


Is it a scalar1

dynamics or CPT violation?

1

1

2

3

Is it a Scalar ?

Extension

DOF

EWPT

DM

Real singlet

Real singlet

Complex Singlet

Real Triplet

?

Mixed Higgs-like states and/or modified BRs: signal reduction invisible search…


Is it a scalar2

dynamics or CPT violation?

1

1

2

3

Is it a Scalar ?

Extension

DOF

EWPT

DM

Real singlet

Real singlet

Complex Singlet

Real Triplet

?

Could be fermionic triplet [e.g., Buckley, Randall, Shuve, JHEP 1105 (2011) 97]. How to distinguish?


Di jet correlations

J dynamics or CPT violation? 1

V

p1

p2

V

J2

R-hadrons from gg fusion

Fermions

Scalars

Buckley, R-M JHEP 1109 (2011) 094

Di-Jet Correlations


New scalars bsm

SM stability & pert’vity dynamics or CPT violation?

VEFF

perturbativity

top loops

EW vacuum

mH

naïve stability scale 

SM unstable above ~ 8 TeV

sets mH

top loops

New Scalars & BSM

Preserving EW Min

“Funnel plot”

Gonderinger, Li, Patel, R-M


New scalars bsm1

SM stability & pert’vity dynamics or CPT violation?

VEFF

perturbativity

top loops

EW vacuum

mH

naïve stability scale 

SM + singlet: stable but non-pertur’tive

DM-H coupling

top loops

New Scalars & BSM

Preserving EW Min

“Funnel plot”

Gonderinger, Li, Patel, R-M


Dark matter stability

V dynamics or CPT violation? EFF

perturbativity

top loops

EW vacuum

mH ?

naïve stability scale 

Z2-breaking vacuum

mS2 = b2 + a2 v2

s

Z2-preserving EW vacuum

No DM: Z2-breaking vac

Dark Matter Stability

Preserving EW Min

“Funnel plot”

Gonderinger, Li, Patel, R-M


V long range dark forces
V. dynamics or CPT violation? Long Range Dark Forces


Torsion balances dark forces

Eot-Wash dynamics or CPT violation?

Kesden & Kamionkowski

Microscope

Torsion Balances & Dark Forces

New interactions in the dark sector ?

  • Long-range, non-grav dark force

  • Violation of weak equiv principle (WEP)

  • Galactic tidal streams & CMB

  • New hierarchy problem

Non-sterile DM & terrestrial WEP tests

Carroll, Mantry, RM, Stubbs Bovy & Farrar


Summary
Summary dynamics or CPT violation?

  • There exist a number of interesting and viable “portals” for probing the dark sector

  • The Higgs portal is particularly interesting now in light of the LHC discovery, and it raises many new questions

  • Discovering scalar dark matter via the Higgs portal could make the idea of scalar fields in the early universe more plausible

  • Simple scalar sector extensions that embody features of UV complete theories illustrate key features of the theory and phenomenology of scalar dark matter ! A rich and exciting period of experiment and theory lies ahead


Back up slides
Back Up Slides dynamics or CPT violation?


Real triplet dm search1

Trigger: Monojet (ISR) + large E dynamics or CPT violation? T

Cuts: large ET hard jet One 5cm track

Real Triplet : DM Search

Basic signature: Charged track disappearing after ~ 5 cm

SM Background: QCD jZ and jW w/ Z !& W!l


Real triplet dm search2

Trigger: Monojet (ISR) + large E dynamics or CPT violation? T

Real Triplet : DM Search

Basic signature: Charged track disappearing after ~ 5 cm

SM Background: QCD jZ and jW w/ Z !& W!l


Lhc phenomenology1

EWPO comp w/ a dynamics or CPT violation? 1=0=b3

EWPO compatible

LHC exotic final states: 4b-jets, gg + 2 b-jets…

SM-like

SM-like w/ H2 ->H1H1 or Singlet-like

SM-like

Singlet-like

Probing  : WBF

Light: all models Black: LEP allowed

LHC: reduced BR(h SM)

LHC: reduced BR(h SM)

Scan: EWPT-viable model parameters

H ! ZZ! 4 l

m2 > 2 m1

m1 > 2 m2

H ! WW! 2j l 

  • EarlyLHC discovery possible

  • Determine as low as ~ 0.5

~ EWB Viable

Signal Reduction Factor

Production

Decay

CMS 30 fb-1

LHC Phenomenology

Signatures


Dm higgs phenomenology
DM & Higgs Phenomenology dynamics or CPT violation?

Relic Density

Vac stability

Gonderinger, Li, Patel, R-M

He, Li, Li, Tandean, Tsai

Direct Detection

Barger, Langacker, McCaskey, R-M, Shaugnessy

He, Li, Li, Tandean, Tsai


Lhc higgs phenomenology5
LHC & Higgs Phenomenology dynamics or CPT violation?

Vac stab & perturbativity

Invisible decays

He, Li, Li, Tandean, Tsai

Gonderinger, Li, Patel, R-M


Lhc higgs phenomenology6
LHC & Higgs Phenomenology dynamics or CPT violation?

Vac stab & pertubativity

Invisible decays

He, Li, Li, Tandean, Tsai

Gonderinger, Li, Patel, R-M

LHC discovery potential

Barger, Langacker, McCaskey, R-M, Shaugnessy

Invis search

(h!SS)=0


Real triplet charged brs i

Pure gauge dynamics or CPT violation?

x0 suppressed

Real Triplet : Charged BRs I

Charged: x0 dependence


Real triplet heavy neutral state
Real Triplet : Heavy Neutral State dynamics or CPT violation?

Neutral: differences with SM Higgs & a2 dependence

Different ratio of WW and ZZ,  BRs


Dm higgs phenomenology1
DM & Higgs Phenomenology dynamics or CPT violation?

Relic Density

Vac stability

Gonderinger, Li, Patel, R-M

He, Li, Li, Tandean, Tsai


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