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First results from kamland: evidence for reactor antineutrino disappearance
Kamland collaboration
SourcePhysical review letters
2003
Volume90Issue:2
KeywordNeutron fission-products Spectrum
Corresponding AuthorEguchi, k (reprint author), tohoku univ, res ctr neutrino sci, sendai, miyagi 9808578, japan.
English AbstractKamland has measured the flux of (nu) over bar (e)'s from distant nuclear reactors. we find fewer (nu) over bar (e) events than expected from standard assumptions about (nu) over bar (e) propagation at the 99.95% c.l. in a 162 ton.yr exposure the ratio of the observed inverse beta-decay events to the expected number without (nu) over bar (e) disappearance is 0.611+/-0.085(stat)+/-0.041(syst) for (nu) over bar (e) energies >3.4 mev. in the context of two-flavor neutrino oscillations with cpt invariance, all solutions to the solar neutrino problem except for the "large mixing angle" region are excluded.
SubjectPhysics
WOS SubjectPhysics, multidisciplinary
Indexed TypeSci
Language英语
WOS IDWos:000180444200007
Available Date2016-02-26