Speaker
Description
Within the framework of quantum field theory, we investigate neutrino oscillations in the presence of a torsion background. Adopting the Einstein–Cartan theory, we analyze two distinct scenarios: a constant torsion field and a torsion field linearly dependent on time. In both cases, we derive modified neutrino oscillation formulas that explicitly depend on the spin orientation of the particles. The torsion-induced energy splitting alters both the oscillation amplitudes and frequencies. The effect reaches its maximum when the torsion magnitude is comparable to the neutrino masses and for very low neutrino momenta, while it vanishes for large torsion values. Furthermore, for torsion strengths significantly exceeding neutrino masses and momenta, neutrino oscillations are strongly suppressed. We also examine the implications of torsion on the CP asymmetry of oscillations. Finally, we discuss the potential relevance of these effects for future experimental investigations, such as the PTOLEMY project, aimed at detecting the cosmological neutrino background, where neutrinos possess extremely low momenta.
