Nonstandard neutrino interactions at COHERENT, DUNE, T2HK and LHC

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.

Non-standard neutrino interactions in U(1)′ model after COHERENT data

“…In past a few years there are many BSM models that have addressed NSIs. Some of the popular models where NSIs can be present are the flavor-sensitive, Z mediated U(1) extended gauge models [12][13][14][15][16]. 1 In these scenarios, an extra gauged U(1) is added to the SM gauge group, where the corresponding symmetry breaking leads to a new gauge boson Z .…”

“…There are several anomaly-free solutions to the U(1) involving baryon numbers, for scenarios where CEνNS and NSI have been explored, see for instance [14][15][16]70]. In our approach, we choose the anomaly-free solution for the U(1) = U(1) B−2Lα−L β , see appendix A for details.…”

Improved global fit to Non-Standard neutrino Interactions using COHERENT energy and timing data

“…More recently the COHERENT collaboration released the detailed timing and energy information [35] of their data. This allows for further tests of NP and it has been used to this effect in a series of recent works [36][37][38][39][40][41][42][43][44][45][46]. With this motivation, in this work we quantify the effect of including the timing and energy information of COHERENT data on the bounds on NC NSI, in particular in the combined global analysis from oscillation experiments.…”

Scalar and tensor neutrino interactions

“…We adopt the following numerical values of the nuclear matrix elements [45,46] Following ref. [47], we study the current and projected constraints on the three GNI from the COHERENT experiment. Several COHERENT experiments with multiple targets have been proposed.…”