Sensitivities to secret neutrino interaction at FASER$\nu$

Abstract

We study the impact of the coupling of neutrinos with a new light neutral gauge boson, $Z^{\prime }$, with a mass of less than 500 {\rm MeV} in FASER$\nu$ experiment. Scenarios in which a light gauge boson is coupled to neutrinos are motivated within numerous contexts which are designed to explain various anomalies in particle physics and cosmology. This interaction leads to a new decay mode for charged mesons to a light lepton plus neutrino and $Z^{\prime }$, (${\pi }^{+}(K^{+})\to e^{+}\nu Z^{\prime }$) followed by the subsequent decay of $Z^{\prime }$ into the pair of neutrino and anti-neutrino, ($Z^{\prime }\to \nu \bar{\nu }$). FASER$\nu$, the Forward Search Experiment at the LHC, has the potential to detect collider neutrinos for the first time. In particular, the FASER$\nu$ emulsion detector will provide the opportunity to detect $\tau$-neutrinos and to measure their energies. Using this ability of FASER$\nu$ emulsion detector, we investigate the potential of FASER$\nu$ experiment and the proposed upgraded version of this experiment, FASER2$\nu$, to constrain the coupling of a neutrino with the light gauge boson.

arXiv comment14 pages, 5 figures

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Cited by in corpus (7)

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• Investigating the fluxes and physics potential of LHC neutrino experiments
• Black Holes as Fermion Factories
• Leptoquark search at the Forward Physics Facility
• Sensitivities on dark photon from the Forward Physics Experiments
• Constraining neutrinophilic mediators at FASER$\nu$, FLArE and FASER$\nu$2
• The Forward Physics Facility at the High-Luminosity LHC