Abstract
We consider a generic dark photon that arises from a hidden U(1) gauge symmetry imposed on right-handed neutrinos (νR). Such a νR-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 νR mix with left-handed neutrinos via Dirac mass terms. We investigate the loop-induced couplings and find that the νR-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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Chauhan, G., Xu, XJ. How dark is the νR-philic dark photon?. J. High Energ. Phys. 2021, 3 (2021). https://doi.org/10.1007/JHEP04(2021)003
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DOI: https://doi.org/10.1007/JHEP04(2021)003