Gravitational baryogenesis after anisotropic inflation

Mitsuhiro Fukushima, Shuntaro Mizuno, Kei Ichi Maeda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Gravitational baryogenesis cannot generate sufficient baryon asymmetry within the low reheating temperature which is constrained from gravitino problem. But⋯ • Anisotropic background metric can enhance generated baryon asymmetry. (through increasing Ṙ and TD) Anisotropic inflation • Anisotropy of the Universe exponentially grows at the end of inflation. • Generated baryon asymmetry YBincreases with large c (large anisotropy). But⋯ • In this model, the amount of baryon asymmetry YBcan be enlarged at most O(1). • Moreover, anisotropy is strongly restricted to be small from CMB observation. • Expectable enhancement is too small to solve above problem.

Original languageEnglish
Title of host publicationProceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015
PublisherKyoto University, Yukawa Institute for Theoretical Physics
Pages334-345
Number of pages12
ISBN (Electronic)9780000000002
Publication statusPublished - 2015
Event25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015 - Kyoto, Japan
Duration: 2015 Dec 72015 Dec 11

Publication series

NameProceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015
Volume2

Conference

Conference25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015
CountryJapan
CityKyoto
Period15/12/715/12/11

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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