Viable Supersymmetry and Leptogenesis with Anomaly Mediation

Journal Article · Thu Jan 13 04:00:00 EST 2005 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.71.075003· OSTI ID:964276

Ibe, Masahiro; Kitano, Ryuichiro; Murayama, Hitoshi; Yanagida, Tsutomu

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)_Y and U(1)_B-L. Even though the right-handed neutrino mass explicitly breaks U(1)_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.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: Physics Division
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 964276
• Report Number(s): LBNL-56582
• Journal Information: Physical Review D, Journal Name: Physical Review D
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
anomaly
flavor
violation
lepton
production
neutrino
mass
neutrino
right-handed
supersymmetry
symmetry breaking
violation
CP