# CPT violation in long baseline neutrino experiments: a three flavor analysis - High Energy Physics - Phenomenology

Abstract: We explore possible signals of CPT violation in neutrinos in the completethree-flavor framework. Employing a systematic expansion in small parameters,we analytically estimate the CPT violating contributions to the survivalprobabilities of $u \mu, \bar{ u} \mu, u e$ and $\bar{ u} e$. The resultsindicate that, in spite of the large number of CPT violating parameters, only asmall number of combinations are relevant for oscillation experiments. Weidentify the combinations that can be constrained at the long baselineexperiments, and show that their contribution to the neutrino Hamiltonian canbe bounded to $< 10^{-23}$ GeV, by considering the NOvA experiment for the muonsector, and neutrino factories for the electron sector.This formalism alsoallows us to translate the bounds on the parameters describing non-standardinteractions of neutrinos into the bounds on CPT violating quantities.

Author: Amol Dighe, Shamayita Ray Tata Inst.

Source: https://arxiv.org/