TY - JOUR
T1 - Massive gravity with nonminimal coupling
AU - Gümrükçüoǧlu, A. Emir
AU - Kimura, Rampei
AU - Koyama, Kazuya
N1 - Funding Information:
Some of the calculations for cosmological perturbations have been performed using the x p and package . This work was supported in part by JSPS Grant-in-Aid for Scientific Research No. JP17K14276 (R. K.). The work of A. E. G. and K. K. has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 646702 “CosTesGrav”). K. K. is supported by the UK STFC ST/S000550/1.
Publisher Copyright:
© 2020 American Physical Society.
PY - 2020/6/15
Y1 - 2020/6/15
N2 - We propose new massive gravity theories with 5 dynamical degrees of freedom. We evade uniqueness theorems regarding the form of the kinetic and potential terms by adopting the "generalized massive gravity" framework, where a global translation invariance is broken. By exploiting the rotation symmetry in the field space, we determine two novel classes of theories. The first one is an extension of generalized massive gravity with a nonminimal coupling. On the other hand, the second theory produces a mass term that is different from de Rham, Gabadadze, Tolley construction and trivially has 5 degrees of freedom. Both theories allows for stable cosmological solutions without infinite strong coupling, which are free of ghost and gradient instabilities.
AB - We propose new massive gravity theories with 5 dynamical degrees of freedom. We evade uniqueness theorems regarding the form of the kinetic and potential terms by adopting the "generalized massive gravity" framework, where a global translation invariance is broken. By exploiting the rotation symmetry in the field space, we determine two novel classes of theories. The first one is an extension of generalized massive gravity with a nonminimal coupling. On the other hand, the second theory produces a mass term that is different from de Rham, Gabadadze, Tolley construction and trivially has 5 degrees of freedom. Both theories allows for stable cosmological solutions without infinite strong coupling, which are free of ghost and gradient instabilities.
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U2 - 10.1103/PhysRevD.101.124021
DO - 10.1103/PhysRevD.101.124021
M3 - Article
AN - SCOPUS:85087030447
SN - 2470-0010
VL - 101
JO - Physical Review D
JF - Physical Review D
IS - 12
M1 - 124021
ER -