Gravitational Wave Oscillations in Bigravity

Kevin Max, Moritz Platscher, and Juri Smirnov
Phys. Rev. Lett. 119, 111101 – Published 12 September 2017

Abstract

We derive consistent equations for gravitational wave oscillations in bigravity. In this framework a second dynamical tensor field is introduced in addition to general relativity and coupled such that one massless and one massive linear combination arise. Only one of the two tensors is the physical metric coupling to matter, and thus the basis in which gravitational waves propagate is different from the basis where the wave is produced and detected. Therefore, one should expect—in analogy to neutrino oscillations—to observe an oscillatory behavior. We show for the first time how this behavior arises explicitly, discuss phenomenological implications, and present new limits on the graviton parameter space in bigravity.

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  • Received 11 April 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.111101

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Kevin Max1,*, Moritz Platscher2,†, and Juri Smirnov3,‡

  • 1Scuola Normale Superiore and INFN Pisa, Piazza dei Cavalieri, 7–56126 Pisa, Italy
  • 2Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
  • 3INFN divisione di Firenze, Dipartimento di Fisica, Università di Firenze, Via Sansone 1, 50019 Sesto Fiorentino, Florence, Italy

  • *kevin.max@sns.it
  • moritz.platscher@mpi-hd.mpg.de
  • juri.smirnov@fi.infn.it

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Issue

Vol. 119, Iss. 11 — 15 September 2017

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