219 citations · 2.3k across the 55 of their papers we have counts for
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Relativistic stars in vector-tensor theories
Ryotaro Kase, Masato Minamitsuji, Shinji Tsujikawa
We study relativistic star solutions in second-order generalized Proca theories characterized by a -breaking vector field with derivative couplings. In the models with cubic…
Suppression of matter couplings with a vector field in generalized Proca theories
Shintaro Nakamura, Ryotaro Kase, Shinji Tsujikawa
We derive the profile of a vector field coupled to matter on a static and spherically symmetric background in the context of generalized Proca theories. The cubic Galileon self-int…
Black holes in vector-tensor theories
Lavinia Heisenberg, Ryotaro Kase, Masato Minamitsuji +1
We study static and spherically symmetric black hole (BH) solutions in second-order generalized Proca theories with nonminimal vector field derivative couplings to the Ricci scalar…
Hairy black-hole solutions in generalized Proca theories
Lavinia Heisenberg, Ryotaro Kase, Masato Minamitsuji +1
We present a family of exact black-hole solutions on a static spherically symmetric background in second-order generalized Proca theories with derivative vector-field interactions…
Instabilities in Horndeski Yang-Mills inflation
Jose Beltran Jimenez, Lavinia Heisenberg, Ryotaro Kase +2
A non-abelian gauge field with a non-minimal Horndeski coupling to gravity gives rise to a de Sitter solution followed by a graceful exit to a radiation-dominated epoch. In…
Cosmology in beyond-generalized Proca theories
Shintaro Nakamura, Ryotaro Kase, Shinji Tsujikawa
The beyond-generalized Proca theories are the extension of second-order massive vector-tensor theories (dubbed generalized Proca theories) with two transverse vector modes and one…