Papers › The ν_R-philic scalar: its loop-induced interactions and Yukawa forces in LIGO observations
The ν_R-philic scalar: its loop-induced interactions and Yukawa forces in LIGO observations
Xun-Jie Xu
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Right-handed neutrinos (ν_R) are often considered as a portal to new hidden physics. It is tempting to consider a gauge singlet scalar (ϕ) that exclusively couples to ν_R via a ν_Rν_Rϕ term. Such a ν_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 ν_R-philic scalar.
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