Effect of torsion in long-baseline neutrino oscillation experiments
arxiv(2024)
摘要
In this work we investigate the effect of curved spacetime on neutrino
oscillation. In a curved spacetime, the effect of curvature on fermionic fields
is represented by spin connection. The spin connection consists of a
non-universal “contorsion" part which is expressed in terms of vector and
axial current density of fermions. The contraction of contorsion part with the
tetrad fields, which connects the internal flat space metric and the spacetime
metric, is called torsion. In a scenario where neutrino travels through
background of fermionic matter at ordinary densities in a curved spacetime, the
Hamiltonian of neutrino oscillation gets modified by the torsional coupling
constants λ_21^' and λ_31^'. The aim of this
work is to study the effect of λ_21^' and
λ_31^' in DUNE and P2SO. In our study we, (i) discuss the
effect of torsional coupling constants on the neutrino oscillation
probabilities, (ii) estimate the capability of P2SO and DUNE to put bounds on
these parameters and (iii) study how the physics sensitivities get modified in
presence of torsion.
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