https://doi.org/10.1140/epjc/s10052-025-13771-4
Regular Article - Theoretical Physics
Effect of torsion in long-baseline neutrino oscillation experiments
1
School of Physics, University of Hyderabad, 500046, Hyderabad, India
2
Center of Excellence for Advanced Materials and Sensing Devices, Ruder Bošković Institute, 10000, Zagreb, Croatia
Received:
4
September
2024
Accepted:
30
December
2024
Published online:
24
January
2025
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 
and 
. The aim of this work is to study the effect of and 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) show how the physics sensitivities get modified in presence of torsion.
© The Author(s) 2025
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