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RESEARCH PRODUCT
Solar Neutrino Observables Sensitive to Matter Effects
Carlos Pena-garayHisakazu Minakatasubject
Nuclear and High Energy PhysicsParticle physicsArticle SubjectSolar neutrinomedia_common.quotation_subjectAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciences7. Clean energy01 natural sciencesAsymmetryStandard ModelHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)0103 physical sciences010306 general physicsNeutrino oscillationBorexinomedia_commonPhysics010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyFísicaSolar neutrino problemlcsh:QC1-999High Energy Physics - Phenomenology13. Climate actionMeasurements of neutrino speedHigh Energy Physics::ExperimentNeutrinolcsh:Physicsdescription
We discuss constraints on the coefficient A_{MSW} which is introduced to simulate the effect of weaker or stronger matter potential for electron neutrinos with the current and future solar neutrino data. The currently available solar neutrino data leads to a bound A_{MSW} = 1.47^{-0.42}_{+0.54} (^{-0.82}_{+1.88}) at 1\sigma (3\sigma) CL, which is consistent with the Standard Model prediction A_{MSW} = 1. For weaker matter potential (A_{MSW} 1), the bound is milder and is dominated by the day-night asymmetry of ^8B neutrino flux recently observed by Super-Kamiokande. Among the list of observable of ongoing and future solar neutrino experiments, we find that (1) an improved precision of the day-night asymmetry of ^8B neutrinos, (2) precision measurements of the low energy quasi-monoenergetic neutrinos, and (3) the detection of the upturn of the ^8B neutrino spectrum at low energies, are the best choices to improve the bound on A_{MSW}.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-09-24 | Advances in High Energy Physics |