Baryogenesis and Higgs Phenomenology

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Baryogenesis and Higgs Phenomenology
M.J. Ramsey-Musolf Wisconsin-Madison
NPAC
Theoretical Nuclear, Particle, Astrophysics
Cosmology
http//www.physics.wisc.edu/groups/particle-theory
/
NCU NTHU Seminar, June 2008
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What is the origin of baryonic matter ?
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Outline

1. Baryogenesis General Features
2. Probing EW phase transition w/ Higgs boson
   phenomenology
3. Computing YB systematically progress
   challenges
4. Illustrative phenomenology in MSSM EDMs, DM,
   Colliders

• 3 models Real Singlet, Complex Singlet, Real
  Triplet

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Baryogenesis Myths

• EW baryogenesis requires a light SUSY Higgs boson
  (mH lt 120 GeV)
• EW baryogenesis requires SUSY with a light RH
  stop
• EDMs have nearly killed EW baryogenesis
• Leptogenesis is the most viable option

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Baryogenesis Ingredients
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Baryogenesis Scenarios
Baryogenesis When? CPV? SUSY? Neutrinos?
?
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EW Baryogenesis Standard Model
Anomalous Processes
Different vacua D(BL) DNCS
Sphaleron Transitions
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EW Baryogenesis Standard Model
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Baryogenesis New Electroweak Physics
Unbroken phase
CP Violation
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EDMs New CPV?

• SM background well below new CPV expectations
• New expts 102 to 103 more sensitive
• CPV needed for BAU?

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EWSB Higgs?

• SM background well below new CPV expectations
• New expts 102 to 103 more sensitive
• CPV needed for BAU?

LEPEWWG
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Baryogenesis New Electroweak Physics
90s Cohen, Kaplan, Nelson
Joyce, Prokopec, Turok
Unbroken phase
CP Violation
Theoretical Issues Strength of phase
transition (Higgs sector) Bubble dynamics
(numerical) Transport at phase boundary (non-eq
QFT) EDMs many-body physics QCD
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Baryogenesis New Electroweak Physics
90s Cohen, Kaplan, Nelson
Joyce, Prokopec, Turok
Unbroken phase
CP Violation
Theoretical Issues Strength of phase
transition (Higgs sector) Bubble dynamics
(expansion rate) Transport at phase boundary
(non-eq QFT) EDMs many-body physics QCD
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Baryogenesis New Electroweak Physics
90s Cohen, Kaplan, Nelson
Joyce, Prokopec, Turok
Unbroken phase
CP Violation
Theoretical Issues Strength of phase
transition (Higgs sector) Bubble dynamics
(expansion rate) Transport at phase boundary
(non-eq QFT) EDMs many-body physics QCD
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Electroweak Phase Transition Higgs
LEP EWWG
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Electroweak Phase Transition Higgs
LEP EWWG
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Electroweak Phase Transition Higgs
LEP EWWG
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Extending the Higgs Sector
Ando, Barger, Langacker, Profumo, R-M,
Shaugnessy, Tulin
SUSY Beyond the MSSM
L soft
GUTs SU(5) example
Fileviez Perez, Patel, Wang, R-M
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The Simplest Extension
Model
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The Simplest Extension, Contd
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Finite Temperature Potential
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Finite Temperature Potential
Potential
Conditions
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Symmetry Breaking
Two Cases for ltSgtat high T
Vmin 0
Vmin V0 lt 0
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Electroweak Symmetry Breaking
Strong first order EWPT
Potential parameters
Small ac limit
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Electroweak Symmetry Breaking
Strong first order EWPT
a1lt0, a2 either sign
a1b3 0, a2 lt 0
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Phenomenology EWPO
Electroweak Precision Observables (EWPO)
Oblique parameters
Similar for S,U
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Phenomenology EWPO contd
Electroweak Precision Observables (EWPO)
Oblique parameters
Global fit (GAPP)
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Phenomenology
Colliders
EWPO favors light SM-like scalar
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Phenomenology
Colliders
Z2 Symmetry
Illustrative only
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LHC Phenomenology

Barger, Langacker, McCaskey, R-M, Shaughnessy
Discovery Potential
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LHC Phenomenology

Barger, Langacker, McCaskey, R-M, Shaughnessy
Discovery Potential
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ILC Phenomenology

(also WWF, ZZF)
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Complex Singlet EWB DM?
Barger, Langacker, McCaskey, R-M Shaugnessy
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Complex Singlet EWB DM?
Barger, Langacker, McCaskey, R-M Shaugnessy
?2 controls ?CDM? EWPT
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A Model Illustration Real Triplet
Fileviez-Perez, Patel, Wang, R-M
( 1, 3, 0 )
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Real Triplet Spectrum
?Neutral Scalars
Charged Scalars
Mixing
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Real Triplet Key Features
????parameter
?EWPO
?Mass Splitting W, Z loops
166 MeV
Fermiophobic
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Real Triplet Decays
Charged x0 dependence
Below WZ Threshold
Above WZ Threshold
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Real Triplet Decays
Neutral differences with SM Higgs a2 dependence
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Real Triplet Production
Pair production dominant
Assoc production ??????? suppressed VBF TBA
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Real Triplet LHC
Photon events a2 dependence
Significance
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Real Triplet ILC
Neutral a2 dependence in r
BR ratios
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Real Triplet Summary
Parameters relevant for EWPT x0 , a1 , a2
H decays x0 , a1
H2 WW coupling via ?????Br(H2-gtWW) a2
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Scalar Sector the EWPT

• Simple extensions of the SM scalar sector (xSM)
  w/ small number of d.o.f. can readily lead to a
  strong, 1st order EWPT as needed for EW
  baryogenesis
• EWPT viable xSM can allow for heavier SM-like
  Higgs consistent with EWPO
• EWPT xSM can readily probed at the LHC and ILC
  using Higgs boson searches
• One can obtain an analytic criteria for
  parameters of xSM needed for 1st order EWPT that
  provides guidance for specific model realizations

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Back Matter
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Electroweak Symmetry Breaking
Critical Temperature
LEP allowed models TC 100 GeV
V0 / TC4 ltlt 1
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Electroweak Symmetry Breaking
x0 dependence
LEP allowed models small x0 possible for
trivial high T vev
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One-loop Finite T Contributions
Cylindrical Co-ordinates
Coleman-Weinberg
One-loop finite T
Ring sum plasma screening
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LHC Phenomenology, contd

Barger, Langacker, McKaskey, R-M, Shaughnessy
Determining x
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Baryogenesis New Electroweak Physics
90s Cohen, Kaplan, Nelson
Joyce, Prokopec, Turok
Unbroken phase
CP Violation
Theoretical Issues Strength of phase
transition (Higgs sector) Bubble dynamics
(expansion rate) Transport at phase boundary
(non-eq QFT) EDMs many-body physics QCD
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Systematic Baryogenesis
Goal Derive dependence of YB on parameters
Lnew systematically (controlled approximations)

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Quantum Transport Baryogenesis
Electroweak Baryogenesis
Particle Propagation Beyond familiar (Peskin) QFT
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Quantum Transport Baryogenesis
Electroweak Baryogenesis
Scale Hierarchy
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Quantum Transport Equations
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Illustrative Study Supersymmetry
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Illustrative Study MSSM
Chargino Mass Matrix
Neutralino Mass Matrix
Resonant CPV M1,2 m
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EDMs Complementary Searches
Improvements of 102 to 103
Electron
Neutron
Neutral Atoms
Deuteron
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EDMs Theory
Neutron
Neutral Atoms
Deuteron
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EDMs Schiff Moments
One-loop
EDM q, l, n
Chromo-EDM q, n
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EDMs Baryogenesis
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EDMs in SUSY
One-loop
EDM q, l, n
Chromo-EDM q, n
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EDM constraints SUSY CPV
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Baryogenesis EDMs Colliders
Cirigliano, Profumo, R-M
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Summary

• EW baryogenesis remains a viable and testable
  mechanism for producing the observed baryon
  asymmetry
• Extensions of the Higgs sector of the SM can
  readily yield a strong 1st order EWPT, and these
  extensions can be probed at LHC and ILC
• Weve made progress in computing YB
  systematically, but challenges remain no ones
  (yet) perfect !
• EDM searches provide our most powerful probe of
  new EW CPV needed for YB

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Back Matter
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0nbb-Decay LNV? Mass Term?
Dirac
Majorana
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SUSY Baryogenesis Colliders
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Baryon Number MSSM
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EDM constraints SUSY CPV
One-loop de slepton mass
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EDM constraints SUSY CPV
One-loop vs. Two-loop EDMs
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EDM constraints SUSY CPV
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Relic Abundance of SUSY DM
Neutralino Mass Matrix
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Dark Matter Relic Abundance
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Dark Matter Future Experiments
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Extending the Higgs Sector GUTs
SU(5) w/ extended Higgs sector
Implications

• Strong 1st order EWPT w/o SUSY ?
• New sources of CPV?
• Light triplet Higgs
• Light leptoquarks (unification)

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LHC Phenomenology, contd

Barger, Langacker, McKaskey, R-M, Shaughnessy
Determining x
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One-loop Finite T Contributions
Cylindrical Co-ordinates
Coleman-Weinberg
One-loop finite T
Ring sum plasma screening
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Baryon Number GY
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Leptogenesis
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