Conveners
Neutrino masses, mixing and discrete symmetries
- Martin Hirsch (Instituto de Fisica Corpuscular (CSIC, University of Valencia))
Neutrino masses, mixing and discrete symmetries
- Carlo Giunti (INFN - National Institute for Nuclear Physics)
Neutrino masses, mixing and discrete symmetries
- Carlo Giunti (INFN - National Institute for Nuclear Physics)
We prove that, in any flavor transition, neutrino oscillation CP violating asymmetries in matter have two disentangled components: (a) a CPT-odd T-invariant term, non-vanishing iff there are interactions with matter; (b) a T-odd CPT-invariant term, non-vanishing iff there is genuine CP violation. As function of the baseline, these two terms are distinct L-even and L-odd observables,...
The Deep Underground Neutrino Experiment (DUNE) is a promising international effort in neutrino physics and aims to discover leptonic CP violation and determine the mass hierarchy by using neutrino oscillations. This experiment will have the ability to probe sub-dominant effects introduced by new physics such as CPT and Lorentz violating interactions, - among others. In this work we discuss...
The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kton multi-purpose liquid scintillator detector with an unprecedented energy resolution of 3% at 1 MeV being built in a dedicated underground laboratory in China and expected to start data taking in 2021. The main physics goal of the experiment is the determination of the neutrino mass ordering with a significance of 3-4 sigma within...
Here we considered how the longest baseline neutrino oscillation available,
crossing most of Earth’s diameter, may improve the measurement and at best disentangle any hypothetical CPT violation occurring between neutrino-antineutrino , while testing τ neutrino and even the appearance of anti tau one at the highest rate. The νμ and anti νμ disappearance correlated with the tau appearance is...
The number of leptons ($L$) may or may not be conserved by the laws of physics. The Standard Model predicts that it is (in perturbative processes), but there is the well known possibility that new physics violates $L$ in 1 or 2 units. The first case ($\Delta L=1$) is associated to proton decay into mesons plus a lepton or anti-lepton; the second case ($\Delta L=2$) is usually associated to...
In scenarios with flavour and CP symmetries CP phases can be predicted. I present possibilities to link the amount of CP violation in the lepton sector to the one in the quark sector. I also discuss examples of correlations of leptonic CP phases at low and high energies, measurable in neutrino oscillations, neutrinoless double beta decay and relevant for leptogenesis, respectively.
A careful study of flavor mixing in Quantum Field Theory reveals an hidden structure, which is due to the presence of Bogoliubov transformations in addition to the mixing rotation [1].
This is deeply related to the presence of unitarily inequivalent representations of the field algebra [2]. Far from being only a mathematical curiosity, this study leads to phenomenological corrections to the...
We exploit the approach to charged lepton and neutrino masses, neutrino mixing and leptonic CP violation based on the modular $S_4$ symmetry.
The light neutrino masses are assumed to be generated via the seesaw mechanism. We construct realistic models without flavons compatible with the data and study the predicted correlations between the neutrino mixing observables.
After discussing the general form of a Majorana neutrino mass matrix I will introduce a master parametrization for the Yukawa matrices in agreement with neutrino oscillation data. This parametrization extends previous results in the literature and can be used for any model that induces Majorana neutrino masses with the seesaw mechanism (with the only exception of the type-II seesaw). The...
The Daya Bay Reactor Neutrino Experiment, located in South China, is one of the current generation short-baseline reactor neutrino experiments which have measured the neutrino mixing angle $\theta_{13}$ value successfully. Utilizing six powerful nuclear reactors as antineutrino sources, and eight functionally identical underground detectors for a near-far relative measurement, Daya Bay has...
We take an existing model with a massive Z' boson that addresses the anomalies in $b \to s$ transitions and extended it with a non-trivial embedding of neutrino masses. We analyse whether the most relevant lepton flavor violating effects are generally induced by the non-universal interaction associated to the $b \to s$ anomalies or by the new physics associated to the neutrino mass generation.
One of the hottest topics in present-day neutrino physics is provided by the hints of sterile species coming from the short-baseline (SBL) anomalies. Waiting for a definitive (dis-)confirmation of these indications by future SBL experiments, other complementary avenues can be explored in the hunt of such elusive particles. An important opportunity is that offered by the long-baseline (LBL)...
The long-standing B-physics anomalies can be addressed invoking the presence of a light right handed neutrino. I discuss the current constraints on the scenario and some implications for neutrino physics.
The Schrodinger equation for three neutrino propagation in matter of constant density is solved analytically. The final result for the oscillation probabilities is obtained directly in the conventional parametric form as in the vacuum but with explicit simple modification of two mixing angles, θ12 and θ13, and mass eigenvalues.
