作者: Masayuki Nakahata,
期刊: AIP Conference Proceedings (AIP Available online 1901) 卷期: Volume 586, issue 1
页码: 83-94
ISSN:0094-243X
年代: 1901
DOI:10.1063/1.1419538
出版商: AIP
数据来源: AIP
摘要:
Recent results from Super-Kamiokande on atmospheric neutrinos, solar neutrinos and supernova neutrinos are presented. The atmospheric neutrino data shows an evidence for&ngr;&mgr;oscillations in the ratio of&ngr;&mgr;/&ngr;eand zenith angle distributions of &mgr;-like events. The neutrino oscillation parameters obtained from the atmospheric neutrino data are&Dgr;m2=(1.7−4)×10−3 eV2andsin2&hthinsp;2&thgr;>0.89for&ngr;&mgr;↔&ngr;&tgr;oscillations. The zenith angle distributions of higher energy atmospheric neutrino data show that the pure&ngr;&mgr;↔&ngr;&tgr;oscillations are favored over the pure&ngr;&mgr;↔&ngr;sterileoscillations. The analyses of solar neutrino data on day/night difference in flux and spectral shape of8Bsolar neutrinos constrained the oscillation parameters for&ngr;eoscillations. The small mixing angle solution and just-so solutions are disfavored with about 95&percent; C.L. The flux constrained analysis of day/night and energy spectrum favours large mixing solutions. The huge Super-Kamiokande detector is able to detect ∼4000 neutrino events, if a supernova happens at the center of our galaxy. No neutrino burst has been observed at SK yet. Progress of the search for relic supernova neutrinos is also discussed. ©2001 American Institute of Physics.
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