Leptogenesis via neutrino oscillation magic

被引：19

作者：

Hamada, Yuta ^{[1
,2
]}

Kitano, Ryuichiro ^{[1
,3
]}

Yin, Wen ^{[4
]}

机构：

[1] KEK Theory Ctr, Tsukuba, Ibaraki 3050801, Japan

[2] Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA

[3] Grad Univ Adv Studies Sokendai, Dept Particle & Nucl Phys, Tsukuba, Ibaraki 3050801, Japan

[4] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2018年 / 10期

关键词：

Cosmology of Theories beyond the SM; Neutrino Physics; Beyond Standard Model; CP violation; NON-CONSERVATION; BARYOGENESIS;

D O I：

10.1007/JHEP10(2018)178

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The possibility of generating the baryon asymmetry of the Universe via flavor oscillation in the early Universe is discussed. After the inflation, leptons are born in some states, travel in the medium, and are eventually projected onto flavor eigenstates due to the scattering via the Yukawa interactions. By using the Lagrangian of the Standard Model with the Majorana neutrino mass terms, llHH, we follow the time evolution of the density matrices of the leptons in this very first stage of the Universe and show that the CP violation in the flavor oscillation can explain the baryon asymmetry of the Universe. In the scenario where the reheating is caused by the decay of the inflaton into the Higgs bosons, the baryon asymmetry is generated by the CP phases in the Pontecorvo-Maki-Nakagawa-Sakata matrix and thus can be tested by the low energy neutrino experiments.

引用

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