0000000000187959

AUTHOR

Andre De Gouvea

showing 3 related works from this author

Minimalistic Neutrino Mass Model

2000

We consider the simplest model which solves the solar and atmospheric neutrino puzzles, in the sense that it contains the smallest amount of beyond the Standard Model ingredients. The solar neutrino data is accounted for by Planck-mass effects while the atmospheric neutrino anomaly is due to the existence of a single right-handed neutrino at an intermediate mass scale between 10^9 GeV and 10^14 GeV. Even though the neutrino mixing angles are not exactly predicted, they can be naturally large, which agrees well with the current experimental situation. Furthermore, the amount of lepton asymmetry produced in the early universe by the decay of the right-handed neutrino is very predictive and ma…

PhysicsNuclear and High Energy PhysicsParticle physicsPhysics::Instrumentation and DetectorsSolar neutrinoPhysics beyond the Standard Modelmedia_common.quotation_subjectAstrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::PhenomenologyFOS: Physical sciencesFísicaAsymmetryUniverseHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics::ExperimentNeutrinoAnomaly (physics)BorexinoParticle Physics - PhenomenologyLeptonmedia_common
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Solving the solar neutrino puzzle with KamLAND and solar data

2001

We study what will be learnt about the solar neutrino puzzle and solar neutrino oscillations once the data from the KamLAND reactor neutrino experiment (soon to become available) are combined with those from the current solar neutrino experiments. We find that, in agreement with previous estimates, if the solution to the solar neutrino puzzle falls on the LMA region, KamLAND should be able to ``pin-point'' the right solution with unprecedented accuracy after a few years of data taking. Furthermore, the light side ($\theta\pi/4$) at the 95% confidence level (CL) for most of the LMA region allowed by the current data at the 99% CL, while the addition of the KamLAND data need not improve our a…

PhysicsNuclear and High Energy PhysicsParticle physicsOscillationPhysics::Instrumentation and DetectorsSolar neutrinoFOS: Physical sciencesOrder (ring theory)SigmaSolar neutrino problemHigh Energy Physics - ExperimentHigh Energy Physics - PhenomenologyHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)AstronomiaAstrophysics::Solar and Stellar AstrophysicsHigh Energy Physics::ExperimentNeutrino oscillationBorexinoParticle Physics - PhenomenologySolar data
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Neutrino Masses and Lepton Flavour Violation in Thick Brane Scenarios

2001

We address the issue of lepton flavour violation and neutrino masses in the ``fat-brane'' paradigm, where flavour changing processes are suppressed by localising different fermion field wave-functions at different positions (in the extra dimensions) in a thick brane. We study the consequences of suppressing lepton number violating charged lepton decays within this scenario for lepton masses and mixing angles. In particular, we find that charged lepton mass matrices are constrained to be quasi-diagonal. We further consider whether the same paradigm can be used to naturally explain small Dirac neutrino masses by considering the existence of three right-handed neutrinos in the brane, and discu…

PhysicsNuclear and High Energy PhysicsParticle physicsMuonHigh Energy Physics::PhenomenologyFOS: Physical sciencesFísicaFermionLepton numberMAJORANAExtra dimensionsHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics::ExperimentNeutrinoBraneParticle Physics - PhenomenologyLepton
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