QFT results for neutrino oscillations and New Physics

TL;DR

This paper uses quantum field theory to analyze how new physics could influence CP asymmetry in neutrino oscillations, potentially observable in future experiments.

Contribution

It develops a formalism to incorporate new physics operators into CP asymmetry calculations in neutrino oscillations, extending previous results.

Findings

Reproduces known CP asymmetry results for V-A operators

Derives additional contributions from new physics operators

Applies formalism to SUSY models with potential observable effects

Abstract

The CP asymmetry in neutrino oscillations, assuming new physics at production and/or detection processes, is analyzed. We compute this CP asymmetry using the standard quantum field theory within a general new physics scenario that may generate new sources of CP and flavor violation. Well known results for the CP asymmetry are reproduced in the case of V -A operators, and additional contributions from new physics operators are derived. We apply this formalism to SUSY extensions of the Standard Model where the contributions from new operators could produce a CP asymmetry observable in the next generation of neutrino experiments.