Viable supersymmetry and leptogenesis with anomaly mediation

Journal Article · Fri Oct 01 04:00:00 EDT 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.075012· OSTI ID:20705383

Ibe, Masahiro; Yanagida, Tsutomu ^[1]; Kitano, Ryuichiro; Murayama, Hitoshi ^[2]

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1. Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)
2. School of Natural Sciences, Institute for Advanced Study, Princeton, New Jersey 08540 (United States)

The seesaw mechanism that explains the small neutrino masses comes naturally with supersymmetric (SUSY) grand-unification and leptogenesis. However, the framework suffers from the SUSY flavor and CP problems, and has a severe cosmological gravitino problem. We propose anomaly mediation as a simple solution to all these problems, which is viable once supplemented by the D-terms for U(1){sub Y} and U(1){sub B-L}. Even though the right-handed neutrino mass explicitly breaks U(1){sub B-L} and hence reintroduces the flavor problem, we show that it lacks the logarithmic enhancement and poses no threat to the framework. The thermal leptogenesis is then made easily consistent with the gravitino constraint.

• OSTI ID: 20705383
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 70; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSMOLOGY
CP INVARIANCE
FLAVOR MODEL
GRAND UNIFIED THEORY
MATHEMATICAL SOLUTIONS
NEUTRINOS
PARTICLE PRODUCTION
REST MASS
SPARTICLES
SUPERSYMMETRY
SYMMETRY BREAKING
U-1 GROUPS
UNITARY SYMMETRY