Neutrino mass, mixing and oscillations

Nunokawa, Hiroshi

doi:10.1590/s0103-97332000000200015

Cited by 10 publications

(2 citation statements)

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“…( 1) in terms of the particle and antiparticle fields, make all needed summations on Lorentz and spin-indexes, and integrate on their spatial momentum. If we call D j to 3 , neglect non-diagonal contributions and take the limit δ → 0, we obtain a…”

Section: Manuscriptijmpementioning

confidence: 99%

“…Experiments with solar, atmospheric and reactor neutrinos have provided evidence on the oscillations between three neutrino flavors caused by non-zero neutrino masses. [1][2][3][4][5][6][7] Different collaborations as the short-baseline neutrinos oscillation experiments LSND (Liquid Scintillator Neutrino Detector) 8 and MiniBoone (Mini Booster Neutrino Experiment), 9 reactor experiments 10 and Gallium detectors 11,12 have published results presenting anomalies in its collected data which suggest the possible existence of at least one extra neutrino species the so-called sterile neutrino (νs), 8,9,11,[13][14][15][16] which is invisible to Z-boson decay and interacts exclusively in a gravitational way. Data suggest a mass-square difference ∆m 2 14 ∼ 1.3 eV 2 and a mixing amplitude 0.1 ≤ |U e4 | ≤ 0.22.…”

Section: Introductionmentioning

confidence: 99%

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Limits on active-sterile neutrino mixing parameters using heavy nuclei abundances

Saez

Fushimi

Mosquera

et al. 2021

Int. J. Mod. Phys. E

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The production of heavy-mass elements due to the rapid neutron-capture mechanism ([Formula: see text]-process) is associated with astrophysical scenarios, such as supernovae and neutron-star mergers. In the [Formula: see text]-process the capture of neutrons is followed by [Formula: see text]-decays until nuclear stability is reached. A key element in the chain of nuclear weak-decays leading to the production of isotopes may be the change of the parameters controlling the neutrino sector, due to the mixing of active and sterile species. In this work, we have addressed this question and calculated [Formula: see text]-decay rates for the nuclei involved in the [Formula: see text]-process chains as a function of the neutrino mixing parameters. These rates are then used in the calculation of the abundance of the heavy elements produced in core-collapse supernova and in neutron-star mergers, starting from different initial mass-fraction distributions. The analysis shows that the core-collapse supernova environment contributes with approximately [Formula: see text] of the total heavy nuclei abundance while the neutron-star merger contributes with about [Formula: see text] of it. Using available experimental data we have performed a statistical analysis to set limits on the active-sterile neutrino mixing angle and found a best-fit value [Formula: see text], a value comparable with those found in other studies reported in the literature.

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Section: Manuscriptijmpementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Limits on active-sterile neutrino mixing parameters using heavy nuclei abundances

Saez

Fushimi

Mosquera

et al. 2021

Int. J. Mod. Phys. E

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A global analysis of neutrino oscillations

Fogli

Lisi

Marrone

et al. 2013

Nuclear Physics B - Proceedings Supplements

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Low-energy (anti)neutrino physics with Borexino: Neutrinos from the primary proton-proton fusion process in the Sun

Mosteiro

Bellini

Benziger

et al. 2015

Nuclear and Particle Physics Proceedings

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The Sun is fueled by a series of nuclear reactions that produce the energy that makes it shine. The primary reaction is the fusion of two protons into a deuteron, a positron and a neutrino. These neutrinos constitute the vast majority of neutrinos reaching Earth, providing us with key information about what goes on at the core of our star. Several experiments have now confirmed the observation of neutrino oscillations by detecting neutrinos from secondary nuclear processes in the Sun; this is the first direct spectral measurement of the neutrinos from the keystone proton-proton fusion. This observation is a crucial step towards the completion of the spectroscopy of pp-chain neutrinos, as well as further validation of the LMA-MSW model of neutrino oscillations

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Neutrino mass, mixing and oscillations

Cited by 10 publications

References 0 publications

Limits on active-sterile neutrino mixing parameters using heavy nuclei abundances

Limits on active-sterile neutrino mixing parameters using heavy nuclei abundances

A global analysis of neutrino oscillations

Low-energy (anti)neutrino physics with Borexino: Neutrinos from the primary proton-proton fusion process in the Sun

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