Baryogenesis with four-fermion operators in low-scale models

Details Baryogenesis with four-fermion operators in low-scale models Baryogenesis with four-fermion operators in low-scale models

2001-10-24

arxiv.org/abs/hep-ph/0110318v3

Int.J.Mod.Phys. A18S1 (2003) 320-328

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages latex, graphicx + amssymb, 2 figures. Talk presented at M-Theory Cosmology conference, August 2001, Cambridge (UK), a

Scientific paper

We describe a nonstandard proposal for baryogenesis in models with a low (O(10-100)TeV) fundamental scale. The scenario has Standard Model field content and enhanced baryon number violating operators deriving from time-dependent fermion localization in an extra dimension. The CKM matrix provides sufficient CP violation. The major constraints are the low reheating temperature and rate of perturbative B-violating reactions compared to the total entropy created. A sufficient baryon fraction may arise, but the cosmological evolution required is likely to be somewhat contrived. Based on work in collaboration with D.J.H. Chung.

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