Massive graviton dark matter with environment dependent mass: A natural explanation of the dark matter-baryon ratio

Katsuki Aoki, Shinji Mukohyama

    研究成果: Article査読

    7 被引用数 (Scopus)

    抄録

    We propose a scenario that can naturally explain the observed dark matter-baryon ratio in the context of bimetric theory with a chameleon field. We introduce two additional gravitational degrees of freedom, the massive graviton and the chameleon field, corresponding to dark matter and dark energy, respectively. The chameleon field is assumed to be nonminimally coupled to dark matter, i.e., the massive graviton, through the graviton mass terms. We find that the dark matter-baryon ratio is dynamically adjusted to the observed value due to the energy transfer by the chameleon field. As a result, the model can explain the observed dark matter-baryon ratio independently from the initial abundance of them.

    本文言語English
    論文番号104039
    ジャーナルPhysical Review D
    96
    10
    DOI
    出版ステータスPublished - 2017 1月 1

    ASJC Scopus subject areas

    • 物理学および天文学(その他)

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