The ν R -philic scalar: its loop-induced interactions and Yukawa forces in LIGO observations

Abstract

Abstract 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 R ν 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.

Keywords

• Beyond Standard Model
• Neutrino Physics
• Solar and Atmospheric Neutrinos