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arXiv · 2012.09980

How dark is the $\nu_R$-philic dark photon?

Garv Chauhan·Xun-Jie Xu
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Abstract

We consider a generic dark photon that arises from a hidden $U(1)$ gauge symmetry imposed on right-handed neutrinos ($\nu_{R}$). Such a $\nu_{R}$-philic dark photon is naturally dark due to the absence of tree-level couplings to normal matter. However, loop-induced couplings to charged leptons and quarks are inevitable, provided that $\nu_{R}$ mix with left-handed neutrinos via Dirac mass terms. We investigate the loop-induced couplings and find that the $\nu_{R}$-philic dark photon is not inaccessibly dark, which could be of potential importance to future dark photon searches at SHiP, FASER, Belle-II, LHC 14 TeV, etc.

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Garv Chauhan, Xun-Jie Xu. 2020-12-17. How dark is the $\nu_R$-philic dark photon?. https://doi.org/10.1007/jhep04(2021)003

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