Suppression of matter couplings with a vector field in generalized Proca theories

Shintaro Nakamura, Ryotaro Kase, Shinji Tsujikawa

研究成果査読

13 被引用数 (Scopus)

抄録

In the context of generalized Proca theories, we derive the profile of a vector field Aμ whose squared AμAμ is coupled to the trace T of matter on a static and spherically symmetric background. The cubic Galileon self-interaction leads to the suppression of a longitudinal vector component due to the operation of the Vainshtein mechanism. For quartic and sixth-order derivative interactions, the solutions consistent with those in the continuous limit of small derivative couplings correspond to the branch with the vanishing longitudinal mode. We compute the corrections to gravitational potentials outside a compact body induced by the vector field in the presence of cubic, quartic, and sixth-order derivative couplings, and show that the models can be consistent with local gravity constraints under mild bounds on the temporal vector component. The quintic vector Galileon does not allow regular solutions of the longitudinal mode for a rapidly decreasing matter density outside the body.

本文言語English
論文番号084005
ジャーナルPhysical Review D
96
8
DOI
出版ステータスPublished - 2017 10 15
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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