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arXiv 1111.1231hep-ph
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Leptogenesis中的硬热环修正I:CP不对称性

Hard-Thermal-Loop Corrections in Leptogenesis I: CP-Asymmetries

Clemens Kiessig, Michael Plumacher

摘要:

本文研究了中微子CP不对称性的硬热环修正,以及在高温下希格斯玻色子在轻子生成中的衰变。我们特别注意的两个轻子准粒子,出现在非零温度,并发现有四个贡献的CP-不对称性,这对应于四个组合的两个轻子准粒子在环和最终状态。在另外两种情况下,我们用零温度传播子来近似HTL轻子传播子,该零温度传播子采用热轻子质量m_l(T)或渐近热轻子质量sqrt{2} m_l(T)。我们发现,CP-不对称性在一个模式的方法不同的一个数量级从完整的双模治疗在有趣的温度制度T \sim M_1。在零温处理中,希格斯玻色子衰变的不对称性比中微子衰变的不对称性大两个数量级。HTL修正对末态轻子不对称性的影响在本系列的第二篇论文中进行了研究。

英文摘要:

We investigate hard-thermal-loop (HTL) corrections to the CP-asymmetries in neutrino and, at high temperature, Higgs boson decays in leptogenesis. We pay special attention to the two leptonic quasiparticles that arise at non-zero temperature and find that there are four contributions to the CP-asymmetries, which correspond to the four combinations of the two leptonic quasiparticles in the loop and in the final states. In two additional cases, we approximate the full HTL-lepton propagator with a zero-temperature propagator that employs the thermal lepton mass m_l(T), or the asymptotic thermal lepton mass sqrt{2} m_l(T). We find that the CP-asymmetries in the one-mode approaches differ by up to one order of magnitude from the full two-mode treatment in the interesting temperature regime T \sim M_1. The asymmetry in Higgs boson decays turns out to be two orders of magnitude larger than the asymmetry in neutrino decays in the zero-temperature treatment. The effect of HTL corrections on the final lepton asymmetry are investigated in paper II of this series.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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