R. L. N. Oliveira

Non-unitary neutrino propagation from neutrino decay

Abstract Neutrino propagation in space–time is not constrained to be unitary if very light states – lighter than the active neutrinos – exist into which neutrinos may decay. If this is the case, neutrino flavor-change is governed by a handful of extra mixing and “oscillation” parameters, including new sources of CP-invariance violation. We compute the transition probabilities in the two- and three-flavor scenarios and discuss the different phenomenological consequences of the new physics. These are qualitatively different from other sources of unitarity violation discussed in the literature.

Parameter Limits for Neutrino Oscillation with Decoherence in KamLAND

In the framework of quantum open systems we analyze data from KamLAND by using a model that considers neutrino oscillation in a three-family approximation with the inclusion of the decoherence effect. Using a

Quantum dissipation and CP violation in MINOS

chi^2

Quantum dissipation andCPviolation in MINOS

test we find new limits for the decoherence parameter which we call

Quantum dissipation in a neutrino system propagating in vacuum and in matter

gamma

Quantum Decoherence Effects in Neutrino Oscillations at DUNE

, considering the most recent data by KamLAND. Assuming an energy dependence of the type

Study of Neutrino Oscillation and Dissipative Effects in LBNE

gamma = gamma_0 left( E/E_0 right) ^n

Solar neutrinos do not bound the decoherence effect

, in 95 % C.L. the limits found are

Non-Unitary Neutrino Propagation

3.7 times 10^{-24} GeV

Dissipação quântica em oscilações de neutrinos

for