Gravitational baryogenesis after anisotropic inflation

Mitsuhiro Fukushima; Shuntaro Mizuno; Kei Ichi Maeda

Gravitational baryogenesis after anisotropic inflation

Mitsuhiro Fukushima, Shuntaro Mizuno, Kei Ichi Maeda

School of Advanced Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 T_D) Anisotropic inflation • Anisotropy of the Universe exponentially grows at the end of inflation. • Generated baryon asymmetry Y_Bincreases with large c (large anisotropy). But⋯ • In this model, the amount of baryon asymmetry Y_Bcan 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 language	English
Title of host publication	Proceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015
Publisher	Kyoto University, Yukawa Institute for Theoretical Physics
Pages	334-345
Number of pages	12
ISBN (Electronic)	9780000000002
Publication status	Published - 2015
Event	25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015 - Kyoto, Japan Duration: 2015 Dec 7 → 2015 Dec 11

Publication series

Name	Proceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015
Volume	2

Conference

Conference	25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015
Country/Territory	Japan
City	Kyoto
Period	15/12/7 → 15/12/11

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

Cite this

Fukushima, M., Mizuno, S., & Maeda, K. I. (2015). Gravitational baryogenesis after anisotropic inflation. In Proceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015 (pp. 334-345). (Proceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015; Vol. 2). Kyoto University, Yukawa Institute for Theoretical Physics.

Gravitational baryogenesis after anisotropic inflation. / Fukushima, Mitsuhiro; Mizuno, Shuntaro; Maeda, Kei Ichi.
Proceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015. Kyoto University, Yukawa Institute for Theoretical Physics, 2015. p. 334-345 (Proceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015; Vol. 2).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Fukushima, M, Mizuno, S & Maeda, KI 2015, Gravitational baryogenesis after anisotropic inflation. in Proceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015. Proceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015, vol. 2, Kyoto University, Yukawa Institute for Theoretical Physics, pp. 334-345, 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015, Kyoto, Japan, 15/12/7.

Fukushima, Mitsuhiro ; Mizuno, Shuntaro ; Maeda, Kei Ichi. / Gravitational baryogenesis after anisotropic inflation. Proceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015. Kyoto University, Yukawa Institute for Theoretical Physics, 2015. pp. 334-345 (Proceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015).

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AB - 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.

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Gravitational baryogenesis after anisotropic inflation

Abstract

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ASJC Scopus subject areas

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