A low energy measurement of the ⁸B solar neutrino spectrum at the Sudbury Neutrino Observatory

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A low energy measurement of the ⁸B solar neutrino spectrum at the Sudbury Neutrino Observatory

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dc.contributor.advisor Klein, Joshua Richard, 1966-
dc.creator Seibert, Stanley Reid
dc.date.accessioned 2012-09-04T16:07:56Z
dc.date.available 2012-09-04T16:07:56Z
dc.date.created 2008-08
dc.date.issued 2012-09-04
dc.identifier.uri http://hdl.handle.net/2152/17755
dc.description.abstract The Sudbury Neutrino Observatory has previously shown that ⁸B solar neutrinos undergo flavor transformation between the Sun and the Earth. This work presents a joint analysis of one-third of the pure D₂O and salt phase data sets with an electron energy threshold of 3.5 MeV. A measurement of the neutral current interaction rate, sensitive to all neutrino flavors, gives a total ⁸B flux of 4.79 ± 0.22 (stat) ± 0.13(syst) × 10⁶ cm⁻²s⁻¹. This is in agreement with the prediction of the Standard Solar Model. For the first time we obtain the v[sunscript e] survival probability separately for downward-going (day) and upward-going (night) solar neutrinos. No significant distortion is observed day or night for ⁸B neutrinos with energies greater than 6 MeV. The lack of distortion, but overall suppression of electron neutrinos relative to the total flux, is consistent with matter-induced neutrino transformation in the Sun and the large mixing angle solution.
dc.format.medium electronic
dc.language.iso eng
dc.rights Copyright © is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.
dc.subject.lcsh Solar neutrinos
dc.subject.lcsh Particles (Nuclear physics)--Flavor
dc.title A low energy measurement of the ⁸B solar neutrino spectrum at the Sudbury Neutrino Observatory
dc.description.department Physics
dc.type.genre Thesis
dc.type.material text
thesis.degree.department Physics
thesis.degree.discipline Physics
thesis.degree.grantor The University of Texas at Austin
thesis.degree.level Doctoral
thesis.degree.name Doctor of Philosophy

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