Mild bounds on bigravity from primordial gravitational waves

• Published in: Journal of cosmology and astroparticle physics Vol. 2015; no. 7
• Main Authors: Fasiello, Matteo, Ribeiro, Raquel H.
• Format: Journal Article
• Language: English
• Published: United States 01.07.2015
• Subjects: AMPLITUDES; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGY; GALACTIC EVOLUTION; GRAVITATIONAL WAVES; IMPLEMENTATION; LIMITING VALUES; MASS; POTENTIALS; RECOMBINATION; SPACE; TENSORS

If the amplitude of primordial gravitational waves is measured in the near-future, what could it tell us about bigravity? To address this question, we study massive bigravity theories by focusing on a region in parameter space which is safe from known instabilities. Similarly to investigations on la...