Probing neutrino magnetic moment and unparticle interactions with Borexino

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dc.creatorMontanino, D.
dc.creatorPicariello, M.
dc.creatorPulido, J.
dc.date2008-01-17
dc.date2008-04-17
dc.date.accessioned2026-07-07T11:55:19Z
dc.date.available2026-07-07T11:55:19Z
dc.descriptionWe discuss the limits on the neutrino magnetic moment and hypothetical interactions with a hidden unparticle sector, coming from the first neutrino data release of the Borexino experiment. The observed spectrum in Borexino depends weakly on the solar model used in the analysis, since most of the signal comes from the mono-energetic 7Be neutrinos. This fact allows us to calibrate the nu-e scattering cross section through the spectral shape. In this way, we have derived a limit on the magnetic moment for the neutrinos coming from the Sun (in which a nu_mu and nu_tau component is present): mu_nu<8.4E-11 mu_B (90%CL) which is comparable with those obtained from low energy reactor experiments. Moreover, we improve the previous upper limit on magnetic moment of the nu_tau by three orders of magnitude and the limit on the coupling constant of the neutrino with a hidden unparticle sector.
dc.description16 pages, 3 figures. Some clarifications and references added. Accepted for publication in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/0801.2643
dc.identifierhttp://arxiv.org/abs/0801.2643
dc.identifierPhys.Rev.D77:093011,2008
dc.identifierdoi:10.1103/PhysRevD.77.093011
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205202
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleProbing neutrino magnetic moment and unparticle interactions with Borexino
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