Finite temperature effects on CP violating asymmetries
Finite temperature effects on CP violating asymmetries
复制标题
有限温度对 CP 破坏不对称性的影响
DOI:
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发表时间:
1997
期刊:
影响因子:
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通讯作者:
F. Vissani
中科院分区:
文献类型:
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作者:
L. Covi;N. Rius;E. Roulet;F. Vissani
We compute the CP violating decay asymmetries relevant for baryogenesis scenarios involving the out of equilibrium decays of heavy particles, including the finite temperature effects arising from the background of light thermal particles which are present during the decay epoch. Thermal effects can modify the size of CP violation by a sizeable fraction in the decay of scalar particles, but we find interesting cancellations in the thermal corrections affecting the asymmetries in the decays of fermions, as well as in the decay of scalars in supersymmetric theories. We also estimate the effects which arise from the motion of the decaying particles with respect to the background plasma.