Neutrino oscillations in cosmological spacetime

Abstract

Neutrino physics is one of the most intriguing and vividly discussed topics in high-energy physics. Phenomena of neutrino oscillation give rise to a large number of experiments to actually observe these oscillations among different flavors of neutrinos. Though neutrino oscillation is confirmed from the experimental scenario, however, in most situations, the effect of the expansion of the Universe in neutrino oscillation has not been considered. Expansion of the present Universe is such a generic feature that it can not be avoided in the neutrino oscillation problem which is the main theme of this article. It also provides some new insights of early-universe neutrinos. Further, the neutrino oscillation can also be used as a tool to probe the existence of torsion in the cosmology. In this article, we report the effect of the expansion of the Universe and the torsion in the neutrino oscillation phenomena.