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タイトル: | A new quasidilaton theory of massive gravity |
著者: | Mukohyama, Shinji |
著者名の別形: | 向山, 信治 |
キーワード: | gravity modified gravity |
発行日: | 1-Dec-2014 |
出版者: | IOP Publishing |
誌名: | Journal of Cosmology and Astroparticle Physics |
巻: | 2014 |
号: | 12 |
論文番号: | 011 |
抄録: | We present a new quasidilaton theory of Poincare invariant massive gravity, based on the recently proposed framework of matter coupling that makes it possible for the kinetic energy of the quasidilaton scalar to couple to both physical and fiducial metrics simultaneously. We find a scaling-type exact solution that expresses a self-accelerating de Sitter universe, and then analyze linear perturbations around it. It is shown that in a range of parameters all physical degrees of freedom have non-vanishing quadratic kinetic terms and are stable in the subhorizon limit, while the effective Newton's constant for the background is kept positive. |
著作権等: | Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. |
URI: | http://hdl.handle.net/2433/193282 |
DOI(出版社版): | 10.1088/1475-7516/2014/12/011 |
出現コレクション: | 学術雑誌掲載論文等 |
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