Nonstandard neutrino interactions at COHERENT, DUNE, T2HK and LHC

TL;DR

This paper investigates how various experimental data from COHERENT, DUNE, T2HK, and LHC can be combined to probe nonstandard neutrino interactions mediated by a new Z' gauge boson across a wide mass range.

Contribution

It provides a comprehensive analysis of the sensitivity of multiple experiments to Z' mediated NSI, highlighting the mass-dependent dominance of collider and neutrino experiments and proposing joint constraints.

Findings

HL-LHC is most sensitive for Z' > 10 GeV.

COHERENT and LHCb data are most sensitive for 0.01-10 GeV Z' masses.

DUNE and T2HK excel for 5-20 MeV Z' masses.

Abstract

We study how nonstandard neutrino interactions (NSI) may be probed by a combination of coherent elastic neutrino-nucleus scattering, neutrino oscillation and collider data, from COHERENT, DUNE, T2HK and the high-luminosity (HL) LHC. We focus on NSI induced by a new flavored gauge boson $Z'$ in a generic anomaly-free ultraviolet-complete model. For $Z'$ masses above 10 GeV, the HL-LHC has the best sensitivity regardless of the flavor structure of the model. For masses between 0.01 GeV-10 GeV, current LHCb data and future COHERENT data have the best sensitivity unless the $Z'$ couplings to the first and second generation leptons are suppressed, in which case DUNE and T2HK have the best sensitivity. For $Z'$ masses between about 5 MeV-20 MeV, DUNE and T2HK have the best sensitivity. We also show how joint analyses of COHERENT and LHC data may constrain such models.