Papers › Probing the ν_R-philic Z′ at DUNE near detectors
Probing the ν_R-philic Z′ at DUNE near detectors
Garv Chauhan, P. S. Bhupal Dev, Xun-Jie Xu
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We consider a hidden U(1) gauge symmetry under which only the right-handed neutrinos (ν_R) are charged. The corresponding gauge boson is referred to as the ν_R-philic Z′. Despite the absence of direct gauge couplings to ordinary matter at tree level, loop-induced couplings of the ν_R-philic Z′ via left-right neutrino mixing can be responsible for its experimental accessibility. An important feature of the ν_R-philic Z′ is that its couplings to neutrinos are generally much larger than its couplings to charged leptons and quarks, thus providing a particularly interesting scenario for future neutrino experiments such as DUNE to probe. We consider two approaches to probe the ν_R-philic Z′ at DUNE near detectors via (i) searching for Z′ decay signals, and (ii) precision measurement of elastic neutrino-electron scattering mediated by the Z′ boson. We show that the former will have sensitivity comparable to or better than previous beam dump experiments, while the latter will improve current limits substantially for large neutrino couplings.
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