Matter induced neutrino decay and solar antineutrinos

Berezhiam, Zurab G.; Moretti, M.; Rossi, Anna Maria

doi:10.1007/bf01557699

Cited by 19 publications

(19 citation statements)

References 21 publications

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“…Analogous couplings with other neutrino flavors can bring about observable effects with interesting applications for astrophysics and cosmology as e.g. matter induced neutrino decay [44,45,[50][51][52] or matter induced decay of the majoron in two neutrinos [53], blocking of active-sterile oscillations in the early universe by the majoron field [54,55], etc. A detailed analysis of the astrophysical limits on the neutrino-majoron couplings can be found in [56].…”

Section: Low Scale Seesaw Modelmentioning

confidence: 99%

Neutron–antineutron oscillation and baryonic majoron: low scale spontaneous baryon violation

Berezhiani

2016

Eur. Phys. J. C

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We discuss the possibility that baryon number B is spontaneously broken at low scales, of the order of MeV or even smaller, inducing the neutron-antineutron oscillation at the experimentally accessible level. An associated Goldstone particle-baryonic majoron can have observable effects in neutron to antineutron transitions in nuclei or dense nuclear matter. By extending baryon number to an anomalyfree B − L symmetry, the baryo-majoron can be identified with the ordinary majoron associated with the spontaneous breaking of lepton number, and it can have interesting implications for neutrinoless 2β decay with the majoron emission. We also discuss the hypothesis that baryon number can be spontaneously broken by QCD itself via the six-quark condensates.

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Section: Low Scale Seesaw Modelmentioning

confidence: 99%

Neutron–antineutron oscillation and baryonic majoron: low scale spontaneous baryon violation

Berezhiani

2016

Eur. Phys. J. C

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“…in the so called hybrid models [4,5,6] where a spin-flavour magnetic moment transition gives ν L e → ν R µ and a mass oscillation yields ν R µ → ν R e . Solar antineutrinos could also originate from neutrino decay [7] both in vacuum [8] and in matter [9]. All this shows that an experimental study of solar antineutrinos is important.…”

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confidence: 97%

Superkamiokande and solar antineutrinos

1997

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We propose to exploit the angular distribution of the positrons emitted in the inverse beta decay to extract a possible antineutrino signal from the Superkamiokande background. From the statistics collected in just 101.9 days one obtains a model independent upper bound on the antineutrino flux (for energy greater than 8.3 MeV) Phi < 9*10^4 cm^-2 s^-1 at the 95% C.L. By assuming the same energy spectrum as for the 8B neutrinos, the 95% C.L. bound is Phi < 6*10^4 cm^-2 s^-1. Within three years of data taking, the sensitivity to neutrino-antineutrino transition probability will reach the 1% level, thus providing a stringent test of hybrid oscillation models.Comment: 7 pages, 1 figure, Late

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“…We assume that neutrinos are stable particles. For a discussion of neutrino instability see Ref [32]. and references therein.…”

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confidence: 99%

A model independent approach to future solar neutrino experiments

Bilenky¹,

Giunti²

1994

Astroparticle Physics

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In the first part of this report we present the results of a model independent analysis of the existing solar neutrino data. We obtained forbidden regions in the plane of the parameters ∆m 2 and sin 2 2θ in two cases: A) Without any restrictions on the values of the solar neutrino fluxes from different reactions; B) With some restrictions that take into account the predictions of all the existing solar models. We show that the existing solar neutrino data allow to exclude rather large regions in the plane of the parameters ∆m 2 and sin 2 2θ (especially in case B). In the second part of this report we present a general method for the analysis of solar neutrino data that can be applied to future solar neutrino experiments (SNO, Super-Kamiokande, Icarus) in which high energy 8 B neutrinos will be detected. We show that these experiments will allow: 1) To reveal in a model independent way the presence of sterile neutrinos in the flux of solar neutrinos on the earth and to obtain lower bounds for the probability of transition of ν e 's into sterile states; 2) To obtain directly from the experimental data the initial 8 B ν e flux and the probability of ν e 's to survive (if there are no transitions of ν e 's into sterile states).

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Matter induced neutrino decay and solar antineutrinos

Cited by 19 publications

References 21 publications

Neutron–antineutron oscillation and baryonic majoron: low scale spontaneous baryon violation

Neutron–antineutron oscillation and baryonic majoron: low scale spontaneous baryon violation

Superkamiokande and solar antineutrinos

A model independent approach to future solar neutrino experiments

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