Gravitational baryogenesis after anisotropic inflation

Mitsuhiro Fukushima, Shuntaro Mizuno, Keiichi Maeda

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    The gravitational baryogensis may not generate a sufficient baryon asymmetry in the standard thermal history of the Universe when we take into account the gravitino problem. Hence, it has been suggested that anisotropy of the Universe can enhance the generation of the baryon asymmetry through the increase of the time change of the Ricci scalar curvature. We study the gravitational baryogenesis in the presence of anisotropy, which is produced at the end of an anisotropic inflation. Although we confirm that the generated baryon asymmetry is enhanced compared with the original isotropic cosmological model, taking into account the constraint on the anisotropy by the recent CMB observations, we find that it is still difficult to obtain the observed baryon asymmetry only through the gravitational baryogenesis without suffering from the gravitino problem.

    Original languageEnglish
    Article number103513
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume93
    Issue number10
    DOIs
    Publication statusPublished - 2016 May 16

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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