Constraints on a noncommutative physics scale with neutrino-electron scattering

Abstract

Neutrino-electron scatterings (ν-e) are purely leptonic processes with robust standard model predictions. Their measurements can therefore provide constraints to physics beyond the standard model. Noncommutative (NC) field theories modify space-time commutation relations, and allow neutrino electromagnetic couplings at the tree level. Their contribution to the neutrino-electron scattering cross section was derived. Constraints were placed on the NC scale parameter Λ NC from ν-e experiments with reactor and accelerator neutrinos. The most stringent limit of Λ NC>3.3TeV at 95% confidence level improves over the direct bounds from collider experiments. © 2012 American Physical Society.