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arXiv · hep-ph/0409001

A New Mechanism For Baryogenesis Living Through Electroweak Era

Hyung Do Kim·Jihn E. Kim·Takuya Morozumi
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Abstract

We present a new mechanism for baryogenesis by introducing a heavy vector-like SU(2)_W singlet quark(s) with Q_{em}=2/3 quark U or Q_{em}=-1/3 quark D. The lifetime of the heavy quark is assumed to be in the range 2 \times 10^{-11}s < t < 1s. Being SU(2)_W singlet, it survives the electroweak phase transition era. It mixes with SU(2)_W doublet quarks with tiny mixing angles to satisfy the FCNC constraints, where a simple Z_2 symmetry is suggested for realizing this scheme. The heavy quark asymmetry is generated in analogy with the old GUT scenario.

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Hyung Do Kim, Jihn E. Kim, Takuya Morozumi. 2004-11-04. A New Mechanism For Baryogenesis Living Through Electroweak Era. https://doi.org/10.1016/j.physletb.2005.04.056

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