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arXiv 0912.3523hep-ph
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Flaint量子玻尔兹曼方程

Flavored Quantum Boltzmann Equations

Vincenzo Cirigliano, Christopher Lee, Michael J. Ramsey-Musolf, Sean Tulin

摘要:

我们从第一性原理出发,利用非平衡场论,推导出描述早期宇宙中味振荡、碰撞和随时间变化的质量矩阵的量子玻尔兹曼方程。工作导致非平凡的顺序在相关的时间尺度的比率,我们详细研究了玩具模型弱尺度重子生成:两个标量物种,通过一个缓慢变化的时间依赖性和CP违反质量矩阵混合,并与热浴相互作用。这个模型清楚地说明了CP不对称性是如何通过非平凡背景中的相干风味振荡产生的。我们数值求解玻尔兹曼方程的密度矩阵,调查在不同的制度碰撞的影响。

英文摘要:

We derive from first principles, using non-equilibrium field theory, the quantum Boltzmann equations that describe the dynamics of flavor oscillations, collisions, and a time-dependent mass matrix in the early universe. Working to leading non-trivial order in ratios of relevant time scales, we study in detail a toy model for weak scale baryogenesis: two scalar species that mix through a slowly varying time-dependent and CP-violating mass matrix, and interact with a thermal bath. This model clearly illustrates how the CP asymmetry arises through coherent flavor oscillations in a non-trivial background. We solve the Boltzmann equations numerically for the density matrices, investigating the impact of collisions in various regimes.

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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