![]() ![]() The discussion is centered around the idea of detecting an upscattering event mediated by a transition magnetic moment in a neutrino. ![]() Massless neutrinos are not excluded and in all cases 105] eV. We revisit the physics of neutrino magnetic moments, focusing in particular on the case where the right-handed, or sterile, neutrinos are heavier (up to several MeV) than the left-handed Standard Model neutrinos. Both uniform and nonuniform suppressions are examined for three different variants of the solar magnetic field and the possible parameter ranges for and ] are investigated. But if the neutrino is a Dirac particle, this change of helicity makes the neutrino a right handed one and thus it will be a sterile neutrino. The neutrino deficit reported by the gallium experiments (SAGE, Gallex) is apparently not as large as the one reported by Homestake and Kamiokande, a phenomenon suggesting a greater suppression in the large energy solar neutrino sector but also consistent with a uniform suppression for all neutrinos. If a neutrino has a non-vanishing magnetic moment, it experiences a rotation of its spin in the presence of a magnetic eld which has a componentperpendicularto the direction of motion to the neutrino. The results reported by the four solar neutrino experiments (Homestake, Kamiokande, SAGE, Gallex) are analyzed from the point of view of the magnetic moment solution to the solar neutrino problem. We discuss extensions of the standard model, where the existence of a leptonic SU(2)1-10 eV and the existence of charged scalar particles in the mass range of 100 GeV. The apparent anticorrelation of the solar-neutrino signal with the 11-yr sunspot cycle observed by Davis can be understood if the electron neutrino has a large magnetic moment. This does not happen in the SM, because the magnetic moment operator is F L F R + ( L R) and requires a right handed neutrino. Rencontres de Moriond on QCD and hadronic interactions conference, Les Arcs (France), 4- Country of Publication: United States Language: English Subject: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS SOLAR NEUTRINOS MAGNETIC MOMENTS NEUTRINO OSCILLATION SU-2 GROUPS ELEMENTARY PARTICLES FERMIONS LEPTONS LIE GROUPS MASSLESS PARTICLES NEUTRINOS RADIATIONS SOLAR PARTICLES SOLAR RADIATION STELLAR RADIATION SU GROUPS SYMMETRY GROUPS 645102* - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties 640104 - Astrophysics & Cosmology- Solar Phenomena Similarly, neutrinos can have a magnetic moment because of intermediate states e W +. (FNAL), Batavia, IL (United States) Sponsoring Org.: DOE/ER OSTI Identifier: 6548407 Report Number(s): FNAL/C-90-187-T CONF-9003161-10 ON: DE91001542 TRN: 91-000360 DOE Contract Number: AC02-76CH03000 Resource Type: Conference Resource Relation: Conference: 25. Publication Date: Mon Jan 01 00:00: Research Org.: Fermi National Accelerator Lab. of Physics and Astronomy Fermi National Accelerator Lab., Batavia, IL (USA) Northwestern Univ., Evanston, IL (USA). ![]()
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