Quantum Field Theory of Neutrino Mixing in Spacetimes with Torsion
Antonio Capolupo,
Giuseppe De Maria,
Simone Monda,
Aniello Quaranta,
Raoul Serao
Affiliations
Antonio Capolupo
Dipartimento di Fisica “E.R. Caianiello”, Universitá degli Studi di Salerno, and INFN Gruppo Collegato di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
Giuseppe De Maria
Dipartimento di Ingegneria Meccanica, Energetica, Gestionale e dei Trasporti Sezione Metodi e Modelli Matematici, Università di Genova, Via All’Opera Pia 15, 16145 Genova, Italy
Simone Monda
Dipartimento di Fisica “E.R. Caianiello”, Universitá degli Studi di Salerno, and INFN Gruppo Collegato di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
Aniello Quaranta
Dipartimento di Fisica “E.R. Caianiello”, Universitá degli Studi di Salerno, and INFN Gruppo Collegato di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
Raoul Serao
Dipartimento di Fisica “E.R. Caianiello”, Universitá degli Studi di Salerno, and INFN Gruppo Collegato di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
In the framework of quantum field theory, we analyze the neutrino oscillations in the presence of a torsion background. We consider the Einstein–Cartan theory and we study the cases of constant torsion and of linearly time-dependent torsion. We derive new neutrino oscillation formulae which depend on the spin orientation. Indeed, the energy splitting induced by the torsion influences oscillation amplitudes and frequencies. This effect is maximal for values of torsion of the same order of the neutrino masses and for very low momenta, and disappears for large values of torsion. Moreover, neutrino oscillation is inhibited for intensities of torsion term much larger than neutrino masses and momentum. The modifications induced by torsion on the CP-asymmetry are also presented. Future experiments, such as PTOLEMY, which have as a goal the analysis of the cosmological background of neutrino (which have very low momenta), can provide insights into the effect shown here.
