9 papers
Spin-torsion interaction and geodesic bending
Sagar Kumar Maity, Amitabha Lahiri
The intrinsic spin of fermions induces torsion in spacetime, leading to an effective four-fermion interaction. This affects the bending of null and timelike geodesics inside a star…
Probing Geometrical NSI at the DUNE experiment
Riya Barick, Indrajit Ghose, Srubabati Goswami +2
In this work, we investigate the implications of a novel non-standard interaction (NSI) of neutrinos. This interaction is geometric in origin -- it arises because the propagation o…
Torsional modulation of atmospheric neutrino oscillation
Riya Barick, Amitabha Lahiri
Fermions act as sources of spacetime torsion. However, this torsion is non-dynamical and can be eliminated using its equations of motion. The resulting theory features an effective…
Neutrino Oscillation in Core Collapse Supernova: The Impact of Spacetime Geometry
Indrajit Ghose, Amitabha Lahiri
Neutrino flavor evolution inside a core-collapse supernova is a topic of active research. The core of a supernova is an intense source of neutrinos and antineutrinos. Self-interact…
Exploring the Effect of Chiral Torsion on Neutrino Oscillation in Long Baseline Experiments
Riya Barick, Amitabha Lahiri
In curved spacetime, neutrinos experience an extra contribution to their effective Hamiltonian coming from a torsion-induced four-fermion interaction that is diagonal in mass basis…
Effects of spacetime geometry on neutrino oscillation inside a Core-Collapse Supernova
Indrajit Ghose, Amitabha Lahiri
Neutrinos are excellent probes of the inner structures of supernovas. However, an understanding of their dynamics remains incomplete, which is crucial for properly interpreting the…
Fermion-Vortex Interactions in Axion Electrodynamics
Saurav Kantha, Amitabha Lahiri
A relativistic action for scalar condensate-fermion mixture is considered where both the scalar boson and the fermion fields are coupled to a gauge field. The dynamics of th…
Parity nonconservation induced by spacetime geometry
Arnab Chakraborty, Amitabha Lahiri
The interaction of fermion spin with spacetime can be non-universal, leading to a new interaction beyond the Standard Model, independent of gravitation. Fermions generate spacetime…
Torsional four-fermion interaction and the Raychaudhuri equation
Shibendu Gupta Choudhury, Sagar Kumar Maity, Amitabha Lahiri
Intrinsic spin of fermions can generate torsion in spacetime. This torsion is a non-propagating field that can be integrated out, leaving an effective non-universal four-fermion in…