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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
22
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pubmed:dateCreated |
2008-7-22
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pubmed:abstractText |
The KamLAND experiment has determined a precise value for the neutrino oscillation parameter Deltam21(2) and stringent constraints on theta12. The exposure to nuclear reactor antineutrinos is increased almost fourfold over previous results to 2.44 x 10(32) proton yr due to longer livetime and an enlarged fiducial volume. An undistorted reactor nu[over]e energy spectrum is now rejected at >5sigma. Analysis of the reactor spectrum above the inverse beta decay energy threshold, and including geoneutrinos, gives a best fit at Deltam21(2)=7.58(-0.13)(+0.14)(stat) -0.15+0.15(syst) x 10(-5) eV2 and tan2theta12=0.56(-0.07)+0.10(stat) -0.06+0.10(syst). Local Deltachi2 minima at higher and lower Deltam21(2) are disfavored at >4sigma. Combining with solar neutrino data, we obtain Deltam21(2)=7.59(-0.21)+0.21 x 10(-5) eV2 and tan2theta12=0.47(-0.05)+0.06.
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pubmed:commentsCorrections |
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pubmed:language |
eng
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pubmed:journal |
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pubmed:status |
PubMed-not-MEDLINE
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pubmed:month |
Jun
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pubmed:issn |
0031-9007
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pubmed:author |
pubmed-author:AbeSS,
pubmed-author:BatygovMM,
pubmed-author:BergerB EBE,
pubmed-author:BuggWW,
pubmed-author:BusenitzJJ,
pubmed-author:ClassenTT,
pubmed-author:DazeleySS,
pubmed-author:DecowskiM PMP,
pubmed-author:DetwilerJ AJA,
pubmed-author:DownumK EKE,
pubmed-author:DwyerD ADA,
pubmed-author:EbiharaTT,
pubmed-author:EfremenkoYY,
pubmed-author:EnomotoSS,
pubmed-author:FIESH LHL,
pubmed-author:FosterJJ,
pubmed-author:FreedmanS JSJ,
pubmed-author:FujikawaB KBK,
pubmed-author:FurunoKK,
pubmed-author:GandoYY,
pubmed-author:GrantCC,
pubmed-author:GrattaGG,
pubmed-author:GuardincerriEE,
pubmed-author:HeegerK MKM,
pubmed-author:Horton-SmithG AGA,
pubmed-author:IUSAA,
pubmed-author:IchimuraKK,
pubmed-author:IkedaHH,
pubmed-author:InoueKK,
pubmed-author:JillingsCC,
pubmed-author:KadenPP,
pubmed-author:KamLAND Collaboration,
pubmed-author:KamyshkovYY,
pubmed-author:KarwowskiH JHJ,
pubmed-author:KeeferGG,
pubmed-author:KibeYY,
pubmed-author:KishimotoYY,
pubmed-author:KogaMM,
pubmed-author:KozlovAA,
pubmed-author:LaneC ECE,
pubmed-author:LearnedJ GJG,
pubmed-author:LendvaiCC,
pubmed-author:LeonardD SDS,
pubmed-author:LukK-BKB,
pubmed-author:MaricicJJ,
pubmed-author:MarkoffD MDM,
pubmed-author:MatsunoSS,
pubmed-author:MaugerCC,
pubmed-author:McKeeDD,
pubmed-author:McKeownR DRD,
pubmed-author:MileticTT,
pubmed-author:MinekawaYY,
pubmed-author:MitsuiTT,
pubmed-author:MurayamaHH,
pubmed-author:NakajimaKK,
pubmed-author:NakamuraKK,
pubmed-author:NakamuraMM,
pubmed-author:O'DonnellTT,
pubmed-author:OwadaKK,
pubmed-author:PakvasaSS,
pubmed-author:PerevozchikovOO,
pubmed-author:PiepkeAA,
pubmed-author:PiquemalFF,
pubmed-author:RicoyJ-RJR,
pubmed-author:ShimizuII,
pubmed-author:ShimizuYY,
pubmed-author:ShiraiJJ,
pubmed-author:SteinerH MHM,
pubmed-author:SuekaneFF,
pubmed-author:SuzukiAA,
pubmed-author:TakemotoYY,
pubmed-author:TamaeKK,
pubmed-author:TangAA,
pubmed-author:TerashimaAA,
pubmed-author:TolichKK,
pubmed-author:TornowWW,
pubmed-author:VogelPP,
pubmed-author:WatanabeHH,
pubmed-author:WinslowL ALA,
pubmed-author:YonezawaEE,
pubmed-author:YoshidaSS,
pubmed-author:ZhangCC
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pubmed:issnType |
Print
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pubmed:day |
6
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pubmed:volume |
100
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pubmed:owner |
NLM
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