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arXiv 1507.06007hep-ph
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希格斯弛豫与宇宙的物质-反物质不对称性

Higgs relaxation and the matter-antimatter asymmetry of the universe

Alexander Kusenko

摘要:

最近对希格斯玻色子质量的测量表明,在大尺度下,标准模型希格斯势的上升相对缓慢,在更大的尺度上可能存在第二个极小值。因此,希格斯场在暴胀过程中可能会产生一个很大的真空期望值。希格斯场从大的后暴胀值到最小有效势的弛豫代表了宇宙演化的一个重要阶段。在这一时期,依赖于时间的希格斯凝聚体可以为轻子数创造一个有效的化学势,导致在一些大的右手马约拉纳中微子质量的存在下产生轻子不对称。电弱球重子重新分配了轻子和重子之间的这种不对称性。即使标准模型在暴胀尺度下是有效的,任何新的物理学都被这种高尺度所抑制,希格斯弛豫的稀薄生成仍然可以解释观测到的宇宙的物质-反物质不对称性。

英文摘要:

The recent measurement of the Higgs boson mass implies a relatively slow rise of the Standard Model Higgs potential at large scales, and a possible second minimum at even larger scales. Consequently, the Higgs field may develop a large vacuum expectation value during inflation. The relaxation of the Higgs field from its large postinflationary value to the minimum of the effective potential represents an important stage in the evolution of the universe. During this epoch, the time-dependent Higgs condensate can create an effective chemical potential for the lepton number, leading to a generation of the lepton asymmetry in the presence of some large right-handed Majorana neutrino masses. Electroweak sphalerons redistribute this asymmetry between leptons and baryons. Higgs relaxation leptogenesis can explain the observed matter-antimatter asymmetry of the universe even if the Standard Model is valid up to the scale of inflation, and any new physics is suppressed by that high scale.

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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