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arXiv 1408.5657hep-ph
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约化极小3-3-1模型中的电弱sphaleron

Electroweak sphalerons in the reduced minimal 3-3-1 model

Vo Quoc Phong, Hoang Ngoc Long, Vo Thanh Van, Nguyen Chi Thanh

摘要:

本文在简化的极小3-3-1(RM 331)模型中计算了电弱sphaleron速率。在早期宇宙的背景下,这个模型经历了一系列的两个一级相变,$SU(3) \rightarrow SU(2)$在TeV尺度和$SU(2)\rightarrow U(1)$在$10^2$ GeV尺度,因为宇宙从热大爆炸冷却下来。通过一个薄壁近似,我们表明,对于每个相变在这个序列中,sphaleron率大于宇宙膨胀率在温度高于临界温度,和相变后,sphaleron过程是解耦的。这可能提供重子数违反(B违反)必要的重子生成在早期宇宙中的非平衡物理的关系。

英文摘要:

We calculate the electroweak sphaleron rates in the reduced minimal 3-3-1 (RM331) model. In the context of the early Universe, this model undergoes a sequence of two first-order phase transitions, $SU(3) \rightarrow SU(2)$ at the TeV scale and $SU(2)\rightarrow U(1)$ at the $10^2$ GeV scale, as the Universe cools down from the hot big bang. By a thin-wall approximation, we show that for each phase transition in this sequence, the sphaleron rate is larger than the cosmological expansion rate at temperatures higher than the critical temperature, and after the phase transition, the sphaleron process is decoupled. This may provide baryon-number violation (B violation) necessary for baryogenesis in the relationship with nonequilibrium physics in the early Universe.

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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