arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.09347hep-phastro-ph.COhep-th
收藏

洗入式瘦生

Wash-In Leptogenesis

Valerie Domcke, Kohei Kamada, Kyohei Mukaida, Kai Schmitz, Masaki Yamada

摘要:

我们提出了一个leptogenesis机制的基础上,成功地运作在右手中微子质量低至几个100 TeV的标准I型跷跷板模型。这种机制,我们称之为“洗入leptogenesis”,不需要任何CP破坏的中微子部门,甚至可以在强洗出制度实施。洗入式的核心思想是将标准的冻结式的稀薄生成推广到非最小宇宙学背景中,在这个背景中,所有在稀薄生成温度下不处于化学平衡的粒子的化学势可以取任意值。这为建立大量新的重子生成模型奠定了基础,其中高温下产生的化学势被重新处理,以在低温下产生非零的B-L不对称性。作为具体的例子,我们讨论了洗入leptogenesis后,轴子膨胀和大统一的背景下。

英文摘要:

We present a leptogenesis mechanism based on the standard type-I seesaw model that successfully operates at right-handed-neutrino masses as low as a few 100 TeV. This mechanism, which we dub "wash-in leptogenesis", does not require any CP violation in the neutrino sector and can be implemented even in the regime of strong wash-out. The key idea behind wash-in leptogenesis is to generalize standard freeze-out leptogenesis to a nonminimal cosmological background in which the chemical potentials of all particles not in chemical equilibrium at the temperature of leptogenesis are allowed to take arbitrary values. This sets the stage for building a plethora of new baryogenesis models where chemical potentials generated at high temperatures are reprocessed to generate a nonvanishing B-L asymmetry at low temperatures. As concrete examples, we discuss wash-in leptogenesis after axion inflation and in the context of grand unification.

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。

↑