1 research outputs found
Alleviating the present tension between T2K and NOA with neutrino New Physics at source
Since neutrino oscillation was observed, several experiments have been built
to measure its parameters. NOA and T2K are two long-baseline experiments
dedicated to measuring mainly the mixing angle , the charge-parity
conjugation phase , and the mass ordering. However, there is a
tension in current data. The T2K allowed region is almost excluded by the
NOA result at the confidence level. We propose a non-standard
interaction (NSI) in neutrino production to relieve this tension. The NSI is
computed through quantum field theory (QFT) formalism, where we derive
perturbative analytical formulae considering NSI in the pion decay. Within this
new approach, we can alleviate NOA and T2K tension for a NSI complex
parameters of order . We show the new phase has a degeneracy to the
Dirac CP phase of the form being a possible
source of violation of charge-parity symmetry