Non-standard interactions in neutral current

Despite its vast success, there are still phenomena that Standard Model (SM) fails to explain. For example, in neutrino experiments, new physics beyond the SM may appear in the form of unknown couplings, typically termed non-standard neutrino interactions (NSIs). In weak sector, NSI has been studied by many authors in the past. However, most of the studies were centered around neutrino oscillation, their masses, and neutrino electromagnetic properties; the effects of NSI in ν - N interactions are still unexplored. Recently, Papoulias et al. studied the cross section within the framework of NSI. In this work, we extend the model to explore the effects of NSI in polarisation observables. Surprisingly, the Q²–variation shows strong dependence over NSI parameters. Here we show the Q² dependence of longitudinal (ζ_L) and transverse (ζ_T) polarisation at E_ν = 1GeV, where the ζ_L shows a mild effect, ζ_T shows a strong effect due to NSI specially at low Q². On the other hand, in the anti-neutrino sector, mid Q² region seems to be more sensitive to NSI parameters