Electroweak Baryogenesis from Late Neutrino Masses

Journal Article · Fri Sep 09 00:00:00 EDT 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.111301· OSTI ID:20699415

Hall, Lawrence J; Murayama, Hitoshi ^[1]; Perez, Gilad ^[1]

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1. Theoretical Physics Group, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

Electroweak baryogenesis, given a first-order phase transition, does not work in the standard model because the quark Yukawa matrices are too hierarchical. On the other hand, the neutrino mass matrix is apparently not hierarchical. In models with neutrino mass generation at low scales, the neutrino Yukawa couplings lead to large CP violation in the reflection probability of heavy leptons by the expanding Higgs bubble wall, and can generate the observed baryon asymmetry of the universe. The mechanism predicts new vectorlike leptons below the TeV scale and sizable {mu}{yields}e processes.

• OSTI ID: 20699415
• Journal Information: Physical Review Letters, Vol. 95, Issue 11; Other Information: DOI: 10.1103/PhysRevLett.95.111301; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BARYONS
COSMOLOGY
CP INVARIANCE
HEAVY LEPTONS
HIGGS MODEL
MASS
MATRICES
NEUTRINOS
PROBABILITY
QUARKS
REFLECTION
STANDARD MODEL
UNIVERSE
YUKAWA POTENTIAL