Speaker
Mr
Mauricio Bustamante
(Pontificia Universidad Catolica del Peru)
Description
We add an energy-independent Hamiltonian to the standard flavour oscillation one. This kind of physics might appear in theories where neutrinos couple differently to a plausible non-zero torsion of the gravitational field or more dramatically in the presence of CPT-violating physics in the flavour oscillations. If this contribution exists, experiments at higher energies are more sensitive to their free parameters, and flavour conversion could be severely modified. We show that this new physics modifies the neutrino mixing angles and find expressions that relate the new, effective, angles to the standard oscillation parameters $\Delta m_{ij}^2$, $\theta_{ij}$ and $\delta_{CP}$ and to the parameters in the new-physics Hamiltonian, within a three-neutrino formalism. We consider scenarios where the new parameters allow for extreme deviations of the expected neutrino flavour ratios at Earth from their standard values. We show that large departures of the standard flavour scenario are plausible, which would be a strong hint of the violation of a conserved symmetry.
Authors
Dr
Carlos Peña-Garay
(Instituto de Fisica Corpuscular)
Mr
Mauricio Bustamante
(Pontificia Universidad Catolica del Peru)
Co-author
Dr
Alberto Gago
(Pontificia Universidad Catolica del Peru)
