3 research outputs found
A new strategy for probing the Majorana neutrino CP violating phases and masses
We propose a new strategy for detecting the CP-violating phases and the
effective mass of muon Majorana neutrinos by measuring observables associated
with neutrino-antineutrino oscillations in decays. Within the
generic framework of quantum field theory, we compute the non-factorizable
probability for producing a pair of same-charged muons in decays as
a distinctive signature of oscillations. We show
that an intense neutrino beam through a long baseline experiment is favored for
probing the Majorana phases. Using the neutrino-antineutrino oscillation
probability reported by MINOS collaboration, a new stringent bound on the
effective muon-neutrino mass is derived.Comment: 4 pages, 1 figur
QFT results for neutrino oscillations and New Physics
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.Comment: 6 pages, 3 figures, version to be published in Phys.Rev.