Exploring SMEFT Induced Non-Standard Interactions from COHERENT to Neutrino Oscillations

TL;DR

This paper assesses how next-generation neutrino experiments and COHERENT data can constrain SMEFT operators, revealing their potential to probe new physics at multi-TeV scales and emphasizing the importance of near detectors.

Contribution

It provides the first comprehensive analysis of SMEFT-induced non-standard neutrino interactions across multiple experiments, establishing new bounds on the UV scale of these operators.

Findings

T2HK's electron neutrino data constrains SMEFT scale to over 450 TeV.

DUNE and JUNO can explore SMEFT operators up to about 25 TeV.

COHERENT experiments are sensitive to new physics up to approximately 900 GeV.

Abstract

We investigate the prospects of next-generation neutrino oscillation experiments DUNE, T2HK and JUNO including TAO within Standard Model Effective Field Theory (SMEFT). We also re-interpret COHERENT data in this framework. Considering both charged and neutral current neutrino Non-Standard Interactions (NSIs), we analyse dimension-6 SMEFT operators and derive lower bounds to UV scale $\Lambda$. The most powerful probe is obtained on ${\cal O}_{{ledq}_{1211}}$ with $\Lambda \gtrsim$ 450 TeV due to the electron neutrino sample in T2HK near detector. We find DUNE and JUNO to be complementary to T2HK in exploring different subsets of SMEFT operators at about 25 TeV. We conclude that near detectors play a significant role in each experiment. We also find COHERENT with CsI and LAr targets to be sensitive to new physics up to $\sim$900 GeV.