期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 10, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP10(2012)148
关键词
Cosmology of Theories beyond the SM; Neutrino Physics
资金
- European Union FP7 ITN INVISIBLES (Marie Curie Actions) [PITN- GA-2011-289442]
We estimate the Baryon Asymmetry of the Universe (BAU) produced in an inverse seesaw model containing extra light singlets, and with lepton number conservation prior to the electroweak phase transition. A CP asymmetry epsilon similar to O(1) is required to obtain a large enough BAU. We discuss the relation between the baryon and WIMP relic densities in baryogenesis scenarios using the out-of-equilibrium decay of a baryon-parent of mass M : when baryon number violation freezes out, the remaining density of baryon-parents is similar to M/m(W) x the WIMP relic density. So the baryon/WIMP ratio is similar to epsilon M/m(W). A natural explanation of the similar WIMP and baryon densities could be that CP violation is of order the ratio m(W)/M.
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