Scalar Dark Matter and the Higgs Portal. M.J. RamseyMusolf WisconsinMadison. NPAC. Theoretical Nuclear, Particle, Astrophysics & Cosmology. http://www.physics.wisc.edu/groups/particletheory/. SSNuDM, Shanghai, September 2012. Outline. Dark Matter Portals Why the Higgs portal?
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M.J. RamseyMusolf
WisconsinMadison
NPAC
Theoretical Nuclear, Particle, Astrophysics & Cosmology
http://www.physics.wisc.edu/groups/particletheory/
SSNuDM, Shanghai, September 2012
Dark Matter Portals
Why the Higgs portal?
Why scalar dark matter ?
Simplest examples: scalar DM & LHC
Longrange dark forces
Thanks: Adam Ritz
EFT: Integrate out heavy DOF & retain only light DOF w/ M <<
Thanks: Adam Ritz
Thanks: Adam Ritz
SM Higgs?
LHC Exclusion
LEP, Tevatron, & ATLAS Exclusion
NonSM Higgs(es) ?
SM Higgs properties ?
SM Higgs?Precision Tests
Scalar fields are theoretically problematic
m2 ~ 2
Scalar Fields in Particle PhysicsScalar fields are a simple
Has a fundamental scalar finally been discovered ?
If so, is it telling us anything about ?
Remarkable agreement with EWPO
Tension: EWPO + Direct Searches
EWPO: data favor a “light” SMlike Higgs scalar
What is the BSM Energy Scale ?Remarkable agreement with EWPO
Agreement w/ SM at ~ 103 level:ONP = c / 2
Barbieri & Strumia ‘99
~ 10 TeV generically
What is the BSM Energy Scale ?Scalar fields are theoretically problematic
m2 ~ 2
Scalar Fields in Particle PhysicsScalar 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 are theoretically problematic
m2 ~ 2
Scalar Fields in Particle PhysicsScalar fields are a simple
Must BSM ~ TeV to maintain a weak scale scalar ?
Scalar fields are theoretically problematic
m2 ~ 2
Scalar Fields in Particle PhysicsScalar 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”
What role do scalar fields play (if any) in the physics of the early universe ?
QCD: q+g! n,p…
Astro: stars, galaxies,..
New Forces ?
Standard Model Universe
QCD: n+p! nuclei
Symmetries & Cosmic HistoryNew Forces ?
Standard Model Universe
SUSY ?
GUTS ?
Extra Dims ?
~
WL
Terascale
Symmetries & Cosmic HistoryWR
NR
WL*
Puzzles the Standard Model can’t solve
Origin of matter
Unification & gravity
Weak scale stability
Neutrinos
QCD: q+g! n,p…
Astro: stars, galaxies,..
New Scalars ?
Standard Model Universe
Scalar Field: Inflaton
Reheat
“Slow roll”
QCD: n+p! nuclei
Scalar Fields & InflationCosmological constant ?
> 0
Scalar Field: Quintessence ?
Scalar Fields & Dark Energy?
Baryogenesis: When? CPV? SUSY? Neutrinos? Nonequilibrium dynamics or CPT violation?
Scalar Fields & the Origin of Matter?
Baryogenesis: When? CPV? SUSY? Neutrinos? dynamics or CPT violation? Nonequilibrium dynamics or CPT violation?
Electroweak Phase Transition ? New Scalars
Scalar Fields & the Origin of Matter?
Baryogenesis: When? CPV? SUSY? Neutrinos? dynamics or CPT violation? Nonequilibrium dynamics or CPT violation?
Electroweak Phase Transition ? New Scalars
Darkogenesis: When? SUSY? Neutrinos? Axions ? YB related ?
Scalar Fields & the Origin of Matter?
?
Baryogenesis: When? CPV? SUSY? Neutrinos? dynamics or CPT violation? Nonequilibrium dynamics or CPT violation?
Electroweak Phase Transition ? New Scalars: CDM ?
Darkogenesis: When? SUSY? Neutrinos? Axions ? YB related ?
Scalar Fields & the Origin of Matter?
?
dynamics or CPT violation?
?
?
?
?
Scalar Fields in CosmologyProblem
Theory
Exp’t
Problem dynamics or CPT violation?
Theory
Exp’t
?
?
?
?
Scalar Fields in CosmologyCould experimental discovery of a fundamental scalar point to early universe scalar field dynamics?
Problem
Theory
Exp’t
?
?
?
?
Focus of this talk, but perhaps part of larger role of scalar fields in early universe
1st order dynamics or CPT violation?
2nd order
Increasingmh
New scalars
EW Phase Transition: New Scalars1st order dynamics or CPT violation?
2nd order
Increasingmh
Baryogenesis Gravity Waves Scalar DM LHC Searches
EW Phase Transition: New ScalarsNew scalars
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
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
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
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
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()
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()
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()
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
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()
Thermal DM: WIMP dynamics or CPT violation?
Direct detection: Spinindep DMnucleus scattering
A
SM
A
SM
Dark Matter: & SI?
Extension dynamics or CPT violation?
DOF
EWPT
DM
1
1
2
?
3
Higgs Portal: Simple Scalar ExtensionsReal singlet
Real singlet
Complex Singlet
Real Triplet
May be lowenergy remnants of UV complete theory & illustrative of generic features
Stable S (dark matter?) dynamics or CPT violation?
Mass matrix
HS 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 ExtensionModel
Simplest extension of the SM scalar sector: add one real scalar S (SM singlet)
O’Connel, RM, Wise; Profumo, RM, Shaugnessy; Barger, Langacker, McCaskey, RM Shaugnessy; He, Li, Li, Tandean, Tsai; Petraki & Kusenko; Gonderinger, Li, Patel, RM; Cline, Laporte, Yamashita; Ham, Jeong, Oh; Espinosa, Quiros; Konstandin & Ashoorioon…
Stable S (dark matter?) dynamics or CPT violation?
h
S
h
x0 = <S>
h1,2
The Simplest Extension, Cont’dMass matrix
Stable S (dark matter?) dynamics or CPT violation?
Mass matrix
HS Mixing
H1 !H2H2
Signal Reduction Factor
xSM EWPT:
Production
Decay
The Simplest ExtensionModel
DM Scenario
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
Stable S (dark matter?) dynamics or CPT violation?
Mass matrix
HS Mixing
H1 !H2H2
DM & SI
Signal Reduction Factor
Independent Parameters:
v0, x0, l0, a1, a2, b3, b4
+
+…
xSM EWPT:
Production
Decay
The Simplest ExtensionModel
DM Scenario
Relic Density dynamics or CPT violation?

S
f
He, Li, Li, Tandean, Tsai
Higgs pole
H
S
f
Direct Detection
Barger, Langacker, McCaskey, RM, Shaugnessy
He, Li, Li, Tandean, Tsai
DM PhenomenologyLHC 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 PhenomenologyInvisible 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 PhenomenologyInvisible 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 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 IH ! W+W! jj : ideally only W decay products in central region (Chehime & Zeppenfeld ‘93)
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
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 PhenomenologyExtension dynamics or CPT violation?
DOF
EWPT
DM
1
1
2
?
3
Higgs Portal: Simple Scalar ExtensionsReal singlet
Real singlet
Complex Singlet
Real Triplet
May be lowenergy remnants of UV complete theory & illustrative of generic features
< S > = 0 dynamics or CPT violation?
Complex Singlet: EWB & DM?Barger, Langacker, McCaskey, RM Shaugnessy
Spontaneously & softly broken global U(1)
Controls CDM , TC , & HS mixing
Gives nonzero MA
Barger, Langacker, McCaskey, RM Shaugnessy
Consequences:
Three scalars:
h1 , h2 : mixtures of h & S
A : dark matter
Phenomenology:
Barger, Langacker, McCaskey, RM, Shaugnessy
2 controls CDM& EWPT
decreasing TC
MH1 = 120 GeV, MH2=250 GeV, x0=100 GeV
Barger, Langacker, McCaskey, RM, Shaugnessy
Two component case (x0=0)
Little sensitivity of scaled SI to
Explain why the scaled direct detection cross section is insensitive to the value of the coupling 2
Single component case (x dynamics or CPT violation? 0 = 0)
EWPT
Complex Singlet: LHC DiscoveryBarger, Langacker, McCaskey, RM, Shaugnessy
Traditional search: CMS
Invisible search: ATLAS
SM Branching Ratios ? dynamics or CPT violation?
D
D
D
D
2nd light state
Viable Dark Matter ?
He et al
EWPT
WIMPNucleus Scattering
Gonderinger, Lim, RM
Barger, Langacker, McCaskey, RM, Shaugnessy
LHC: WBF “Invisible decay” search
SM Higgs?Three scalars: h1,2 (Higgslike) D (dark matter)
Extension dynamics or CPT violation?
DOF
EWPT
DM
1
1
2
?
3
Higgs Portal: Simple Scalar ExtensionsReal singlet
Real singlet
Complex Singlet
Real Triplet
May be lowenergy remnants of UV complete theory & illustrative of generic features
S dynamics or CPT violation? 0 , S+, S
EWPT: a1,2 = 0 & <> = 0
DM & EWPT: a1 = 0 & <> = 0
/
/
Real TripletFileviezPerez, Patel, Wang, RM: PRD 79: 055024 (2009); 0811.3957 [hepph]
~ ( 1, 3, 0 )
S dynamics or CPT violation? 0 , S+, S
EWPT: a1,2 = 0 & <> = 0
DM & EWPT: a1 = 0 & <> = 0
/
/
Small: param
Real TripletFileviezPerez, Patel, Wang, RM: 0811.3957 [hepph]
~ ( 1, 3, 0 )
S dynamics or CPT violation? 0 , S+, S
EWPT: a1,2 = 0 & <> = 0
DM & EWPT: a1 = 0 & <> = 0
/
/
Real TripletFileviezPerez, Patel, Wang, RM: 0811.3957 [hepph]
~ ( 1, 3, 0 )
Small: param
Consider the real triplet extension in which there is no H0  mixing: explain why cannot decay to Standard Model fermions, unlike the H0
S dynamics or CPT violation? 0 , S+, S
gZ / 2 I3  4 Q sin2W
Y = 2 ( Q  I3 )
Want Y = 0
Real TripletFileviezPerez, Patel, Wang, RM: 0811.3957 [hepph]
~ ( 1, 3, 0 )
New feature: gauge interactions & direct detection
S dynamics or CPT violation? 0 , S+, S
q
q
Z 0
W +
q
q
EW cross sections w/ charged states + ET
Real TripletFileviezPerez, Patel, Wang, RM: 0811.3957 [hepph]
~ ( 1, 3, 0 )
New feature: gauge interactions & LHC production
D
D
D
D
LHC PhenomenologySM Branching Ratios ?
Four scalars: h1 (Higgslike) (dark matter) (new states)
LEP: M > 100 GeV ! BR(invis) = 0
FileviezPerez, Patel, RM, Wang
Pure gauge dynamics or CPT violation?
x0 supressed
Real Triplet : Charged BRsCharged: x0 dependence
Below WZ Threshold
Above WZ Threshold
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 SearchBasic signature: Charged track disappearing after ~ 5 cm
SM Background: QCD jZ and jW w/ Z !& W!l
D dynamics or CPT violation?
D
D
D
SM Higgs?SM Branching Ratios ?
Four scalars: h1 (Higgslike) (dark matter) (new states)
FileviezPerez, Patel, RM, Wang
Neutral SMlike Higgs: H+ loops and BR ( H1!)
X0=0: DM case
X0>0: EWPT case
D dynamics or CPT violation?
D
D
D
SM Higgs?LHC: H !
1 dynamics or CPT violation?
1
2
3
Is it a Scalar ?Extension
DOF
EWPT
DM
Real singlet
Real singlet
Complex Singlet
Real Triplet
?
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 Higgslike states and/or modified BRs: signal reduction invisible search…
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?
J dynamics or CPT violation? 1
V
p1
p2
V
J2
Rhadrons from gg fusion
Fermions
Scalars
Buckley, RM JHEP 1109 (2011) 094
DiJet CorrelationsSM 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 & BSMPreserving EW Min
“Funnel plot”
Gonderinger, Li, Patel, RM
SM stability & pert’vity dynamics or CPT violation?
VEFF
perturbativity
top loops
EW vacuum
mH
naïve stability scale
SM + singlet: stable but nonpertur’tive
DMH coupling
top loops
New Scalars & BSMPreserving EW Min
“Funnel plot”
Gonderinger, Li, Patel, RM
V dynamics or CPT violation? EFF
perturbativity
top loops
EW vacuum
mH ?
naïve stability scale
Z2breaking vacuum
mS2 = b2 + a2 v2
s
Z2preserving EW vacuum
No DM: Z2breaking vac
Dark Matter StabilityPreserving EW Min
“Funnel plot”
Gonderinger, Li, Patel, RM
EotWash dynamics or CPT violation?
Kesden & Kamionkowski
Microscope
Torsion Balances & Dark ForcesNew interactions in the dark sector ?
Nonsterile DM & terrestrial WEP tests
Carroll, Mantry, RM, Stubbs Bovy & Farrar
Trigger: Monojet (ISR) + large E dynamics or CPT violation? T
Cuts: large ET hard jet One 5cm track
Real Triplet : DM SearchBasic signature: Charged track disappearing after ~ 5 cm
SM Background: QCD jZ and jW w/ Z !& W!l
Trigger: Monojet (ISR) + large E dynamics or CPT violation? T
Real Triplet : DM SearchBasic signature: Charged track disappearing after ~ 5 cm
SM Background: QCD jZ and jW w/ Z !& W!l
EWPO comp w/ a dynamics or CPT violation? 1=0=b3
EWPO compatible
LHC exotic final states: 4bjets, gg + 2 bjets…
SMlike
SMlike w/ H2 >H1H1 or Singletlike
SMlike
Singletlike
Probing : WBF
Light: all models Black: LEP allowed
LHC: reduced BR(h SM)
LHC: reduced BR(h SM)
Scan: EWPTviable model parameters
H ! ZZ! 4 l
m2 > 2 m1
m1 > 2 m2
H ! WW! 2j l
~ EWB Viable
Signal Reduction Factor
Production
Decay
CMS 30 fb1
LHC PhenomenologySignatures
Relic Density
Vac stability
Gonderinger, Li, Patel, RM
He, Li, Li, Tandean, Tsai
Direct Detection
Barger, Langacker, McCaskey, RM, Shaugnessy
He, Li, Li, Tandean, Tsai
Vac stab & perturbativity
Invisible decays
He, Li, Li, Tandean, Tsai
Gonderinger, Li, Patel, RM
Vac stab & pertubativity
Invisible decays
He, Li, Li, Tandean, Tsai
Gonderinger, Li, Patel, RM
LHC discovery potential
Barger, Langacker, McCaskey, RM, Shaugnessy
Invis search
(h!SS)=0
Pure gauge dynamics or CPT violation?
x0 suppressed
Real Triplet : Charged BRs ICharged: x0 dependence
Neutral: differences with SM Higgs & a2 dependence
Different ratio of WW and ZZ, BRs
Relic Density
Vac stability
Gonderinger, Li, Patel, RM
He, Li, Li, Tandean, Tsai