Probing Majorana neutrino CP phases and masses in neutrino–antineutrino conversion

• Published in: Physics letters. B Vol. 693; no. 4; pp. 438 - 442
• Main Authors: Delepine, David, Macías, Vannia González, Khalil, Shaaban, López Castro, Gabriel
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 11.10.2010; Elsevier
• Subjects: CP Majorana phase; Decay; Elementary particles; Exact sciences and technology; Long base; Minos; Muons; Neutrino oscillation; Neutrinos; Nuclear physics; Oscillations; Phases; Physics; Strategy; The physics of elementary particles and fields; CP Majorana phase; Minos; Long base; Neutrino oscillation; Elementary particle mass; Probability; Neutrino beams; Neutrino oscillations; Neutrino mass; Elementary particles; Antineutrinos; Muon decay; CP invariance; Massless particles; Effective mass; Majorana theory; Quantum field theory; Muon neutrinos
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2010.08.068

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 π± decays. Within the generic framework of quantum field theory, we compute the non-factorizable probability for producing a pair of same-charged muons in π± decays as a distinctive signature of νμ−νμ¯ 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.