Graviton Mass Bounds in Very Special Relativity from Binary Pulsar's Gravitational Waves

Abstract

In this work we study the gravitational radiation produced by a keplerian binary system within the context of Very Special Linear Gravity (VSLG), a novel theory of linearized gravity in the framework of Very Special Relativity (VSR) allowing for a gauge-invariant mass $m_g$ of the graviton. For this task, we exploit Effective Field Theory's techniques, which require, among others, the calculation of the squared amplitude of the emission process and therefore the polarization sum for VSLG gravitons. Working in the radiation zone and using the standard energy momentum tensor's expression for keplerian binaries, we derive and study the properties of the VSLG energy loss and period decrease rates, also verifying they reduce to the correct General Relativity limit when sending $m_g\to 0$. Finally, using astronomical data from the Hulse-Taylor binary and the Double Pulsar J0737-3039, we obtain an upperbound on the VSLG graviton mass of $m_g\sim 10^{-21}eV$ that, while being comparable to bounds obtained in this same way for other massive gravity models, is still weaker than the kinematical bound $\sim 10^{-22}eV$ obtained from the combined observation of the astronomical events GW170817 and GRB170817A, which should still hold in VSLG.

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Cited by in corpus (1)

• VSL-Gravity in light of PSR B1913+16 Full Data Set: Upper limits on graviton mass and its theoretical consequences