Finite temperature effects on CP violating asymmetries

Finite temperature effects on CP violating asymmetries
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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
F. Vissani
中科院分区:
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文献类型:
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作者:
L. Covi;N. Rius;E. Roulet;F. Vissani

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我们计算的CP违反衰变不对称性相关的重子生成的情况下,涉及的平衡衰变的重粒子,包括有限的温度效应所产生的背景下的光的热粒子的衰变时期。热效应可以修改的CP违反的标量粒子的衰变中的一个相当大的部分的大小,但我们发现有趣的取消在热修正影响的费米子的衰变中的不对称性,以及在超对称理论中的标量的衰变。我们还估计了衰变粒子相对于背景等离子体的运动所产生的影响。
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.