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arXiv 1505.02461hep-phastro-ph.CO
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Higgs凝聚弛豫过程中通过中微子产生的轻子生成

Leptogenesis Via Neutrino Production During Higgs Condensate Relaxation

Lauren Pearce, Louis Yang, Alexander Kusenko, Marco Peloso

摘要:

在暴胀过程中,包括希格斯玻色子在内的标量场可能会获得一个非零的真空期望值,而这个真空期望值随后必须在再加热过程中松弛到平衡值。在含时凝聚体的存在下,真空态可以演化成粒子数非零的态。我们表明,在中微子扇区的轻子数破坏的存在下,粒子的产生可以解释所观察到的宇宙的物质-反物质不对称性。我们发现,这种形式的leptogenesis是特别有效的,当希格斯凝聚衰变迅速,在低再热尺度。作为计算的一部分,我们给出了具有非零随时间变化的化学势以及随时间变化的质量的马约拉纳费米子的Bogoliubov变换的一些精确结果。

英文摘要:

During inflation, scalar fields, including the Higgs boson, may acquire a nonzero vacuum expectation value, which must later relax to the equilibrium value during reheating. In the presence of the time-dependent condensate, the vacuum state can evolve into a state with a nonzero particle number. We show that, in the presence of lepton number violation in the neutrino sector, the particle production can explain the observed matter-antimatter asymmetry of the universe. We find that this form of leptogenesis is particularly effective when the Higgs condensate decays rapidly and at low reheat scale. As part of the calculation, we present some exact results for the Bogoliubov transformations for Majorana fermions with a nonzero time-dependent chemical potential, in addition to a time-dependent mass.

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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