The $\nu_{R}$-philic scalar: its loop-induced interactions and Yukawa forces in LIGO observations

Xun-Jie Xu

doi:10.1007/jhep09(2020)105

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arXiv · 2007.01893

The $\nu_{R}$-philic scalar: its loop-induced interactions and Yukawa forces in LIGO observations

Xun-Jie Xu

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Abstract

Right-handed neutrinos ($\nu_{R}$) are often considered as a portal to new hidden physics. It is tempting to consider a gauge singlet scalar $(\phi)$ that exclusively couples to $\nu_{R}$ via a $\nu_{R}\nu_{R}\phi$ term. Such a $\nu_{R}$-philic scalar does not interact with charged fermions at tree level but loop-induced effective interactions are inevitable, which are systematically investigated in this work. The magnitude of the loop-induced couplings coincidentally meets the current sensitivity of fifth-force searches. In particular, the loop-induced coupling to muons could be tested in the recent LIGO observations of neutron star mergers as there might be a sizable Yukawa force in the binary system mediated by the $\nu_{R}$-philic scalar.

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Xun-Jie Xu. 2020-07-03. The $\nu_{R}$-philic scalar: its loop-induced interactions and Yukawa forces in LIGO observations. https://doi.org/10.1007/jhep09(2020)105

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