Chiral Symmetries and Low Energy Searches for New Physics

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Chiral Symmetries and Low Energy Searches for New
Physics
M.J. Ramsey-Musolf Caltech Wisconsin-Madison
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Fundamental Symmetries Cosmic History

• What were the fundamental symmetries that
  governed the microphysics of the early
  universe?
• Were there additional (broken) chiral
  symmetries?
• What insights can low energy (E ltlt MZ) precision
  electroweak studies provide?
• How does the approximate chiral symmetry of
  QCD the affect low energy search for
  new symmetries?

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Fundamental Symmetries Cosmic History
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Fundamental Symmetries Cosmic History
Puzzles the Standard Model cant solve

• Origin of matter
• Unification gravity
• Weak scale stability
• Neutrinos

What are the symmetries (forces) of the early
universe beyond those of the SM?
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What are the new fundamental symmetries?
Two frontiers in the search
Collider experiments (pp, ee-, etc) at higher
energies (E gtgt MZ)
Indirect searches at lower energies (E lt MZ) but
high precision
Particle, nuclear atomic physics
High energy physics
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What are the new fundamental symmetries?

• Why is there more matter than antimatter in the
  present universe?
• What are the unseen forces that disappeared from
  view as the universe cooled?
• What are the masses of neutrinos and how have
  they shaped the evolution of the universe?

Electric dipole moment dark matter searches
Precision electroweak weak decays e- scattering
Neutrino interactions 0nbb-decay
Tribble report
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Fundamental Symmetries Cosmic History
Baryogenesis When? SUSY? Neutrinos? CPV?
WIMPy D.M. Related to baryogenesis?
New gravity? Grav baryogenesis?
?
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What is the origin of baryonic matter ?
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EDM Probes of New CP Violation
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Baryogenesis New Electroweak Physics
90s Cohen, Kaplan, Nelson
Joyce, Prokopec, Turok
Unbroken phase
CP Violation
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Baryogenesis Dark Matter SUSY
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Baryogenesis Dark Matter SUSY
Chargino Mass Matrix
Neutralino Mass Matrix
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EDM constraints SUSY CPV
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Dark Matter Future Experiments
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Precision Ewk Probes of New Symmetries
Unseen Forces Supersymmetry ?

• Unification gravity
• Weak scale stability
• Origin of matter
• Neutrinos

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Weak decays new physics
See Moulson, Cirigliano
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Weak decays SUSY
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Weak decays SUSY Correlations
SUSY loop-induced operators
with mixing between L,R chiral supermultiplets
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Pion leptonic decay SUSY
A non-zero DNEW would shift Fp
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Pion leptonic decay SUSY
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Lepton Scattering New Symmetries
Parity-Violating electron scattering
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Probing SUSY with PV eN Interactions
Kurylov, Su, MR-M
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Probing SUSY with PV eN Interactions
Kurylov, R-M, Su
??? SUSY dark matter
??? SUSY dark matter
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Fundamental Symmetries Cosmic History
Neutrinos ?
LFV LNV ?
Are they their own antiparticles? Why are their
masses so small? Can they have magnetic
moments? Implications of mn for neutrino
interactions ?
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Neutrino Mass Magnetic Moments
Bell, Cirigliano, Gorshteyn,R-M, Vogel, Wang,
Wise Davidson, Gorbahn, Santamaria
How large is mn ?
Experiment mn lt (10-10 - 10-12) mB e
scattering, astro limits
Radiatively-induced mn
Both operators chiral odd
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Muon Decay Neutrino Mass
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Correlations in Muon Decay mn
Model Independent Analysis
2005 Global fit Gagliardi et al.
Model Dependent Analysis
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Neutrino Mass 0n bb - decay
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Neutrino Mass 0n bb - decay
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Neutrino Mass 0n bb - decay
Prezeau, R-M, Vogel
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Conclusions

• Low energy probes of physics beyond the SM give
  us a unique window on the fundamental symmetries
  of the early universe that complements direct
  searches for new physics at colliders
• These symmetries - including broken chiral
  symmetries - are needed to explain the origin of
  matter, provide for stability of the electroweak
  scale, incorporate new forces implied by
  unification, and account for the properties of
  neutrinos
• The broken chiral symmetry of QCD also provides
  an important tool for sharpening Standard Model
  predictions for low energy observables and making
  any deviations interpretable in terms of new
  symmetries