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Signatures of graviton masses on the CMB
2018
Journal of Cosmology and Astroparticle Physics
The impact of the existence of gravitons with non-vanishing masses on the B modes of the Cosmic Microwave Background (CMB) is investigated. We also focus on putative modifications to the speed of the gravitational waves. We find that a change of the graviton speed shifts the acoustic peaks of the CMB and then could be easily constrained. For the case of massive gravity, we show analytically how the B modes are sourced in a manner differing from the massless case leading to a plateau at low l in
doi:10.1088/1475-7516/2018/03/008
fatcat:2y7fprrgtbcn3lfzezftizo3f4