BB mode angular power spectrum of CMB from massive gravity
N. Malsawmtluangi, P. K. Suresh
TL;DR
This paper investigates the BB-mode angular power spectrum of the CMB caused by primordial massive gravitational waves across various inflation models, constraining graviton mass using observational data and theoretical considerations.
Contribution
It provides a comparative analysis of the BB-mode spectrum with observational data and estimates bounds on the primordial graviton mass considering modified dispersion relations.
Findings
Constraints on graviton mass from CMB data
Agreement of graviton mass estimates with theoretical models
Refined bounds on primordial graviton mass
Abstract
The BB-mode correlation angular power spectrum of CMB is studied for primordial massive gravitational waves for several inflation models. The comparative study of the angular power spectrum with the joint BICEP2/Keck Array and Planck data suggests further constraint on the lower and upper bounds on the mass of primordial gravitons. Assuming a modified dispersion relation, the mass of primordial graviton is also calculated. The resulting constraint also agrees with other theoretical estimates.
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