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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
15
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pubmed:dateCreated |
2001-4-30
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pubmed:abstractText |
We have studied the rare weak radiative hyperon decay Xi degrees -->Sigma degrees gamma in the KTeV experiment at Fermilab. We have identified 4045 signal events over a background of 804 events. The dominant Xi degrees -->Lambdapi degrees decay, which was used for normalization, is the only important background source. An analysis of the acceptance of both modes yields a branching ratio of B(Xi degrees -->Sigma degrees gamma)/B(Xi degrees -->Lambdapi degrees ) = (3.34+/-0.05+/-0.09)x10(-3). By analyzing the final state decay distributions, we have also determined that the Sigma degrees emission asymmetry parameter for this decay is alpha(XiSigma) = -0.63+/-0.09.
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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 |
Apr
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pubmed:issn |
0031-9007
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pubmed:author |
pubmed-author:YamanakaTT,
pubmed-author:CoxBB,
pubmed-author:LeeN TNT,
pubmed-author:GrahamGG,
pubmed-author:WangJJ,
pubmed-author:PangMM,
pubmed-author:ColemanRR,
pubmed-author:SuzukiII,
pubmed-author:GrahamJJ,
pubmed-author:BrightSS,
pubmed-author:SlaterWW,
pubmed-author:WinstonRR,
pubmed-author:TanP LPL,
pubmed-author:NakayaTT,
pubmed-author:ShieldsJJ,
pubmed-author:KesslerRR,
pubmed-author:NguyenHH,
pubmed-author:WhiteH BHB,
pubmed-author:CortiGG,
pubmed-author:FordRR,
pubmed-author:HidakaSS,
pubmed-author:QuinnBB,
pubmed-author:TripathiAA,
pubmed-author:SadamotoMM,
pubmed-author:ArisakaKK,
pubmed-author:ChewGG,
pubmed-author:StoneR LRL,
pubmed-author:HammJJ,
pubmed-author:PrasadVV,
pubmed-author:JensenD ADA,
pubmed-author:BelzJJ,
pubmed-author:TurnerS ESE,
pubmed-author:NelsonK SKS,
pubmed-author:AlexopoulosTT,
pubmed-author:WhitmoreJJ,
pubmed-author:HaganKK,
pubmed-author:BellavanceAA,
pubmed-author:PordesRR,
pubmed-author:O'DellVV,
pubmed-author:MonnierEE,
pubmed-author:ChildressSS,
pubmed-author:ThomsonG BGB,
pubmed-author:LataJJ,
pubmed-author:ShanahanPP,
pubmed-author:BarkerA RAR,
pubmed-author:BownCC,
pubmed-author:CrislerM BMB,
pubmed-author:BergmanD RDR,
pubmed-author:SolomeyNN,
pubmed-author:RoodmanAA,
pubmed-author:Alavi-HaratiAA,
pubmed-author:ArentonMM,
pubmed-author:AveritteSS,
pubmed-author:BellantoniLL,
pubmed-author:Ben-DavidRR,
pubmed-author:BlucherEE,
pubmed-author:BockG JGJ,
pubmed-author:CorcoranM DMD,
pubmed-author:ErwinA RAR,
pubmed-author:GlazovAA,
pubmed-author:GolossanovAA,
pubmed-author:HalkiadakisEE,
pubmed-author:HanagakiKK,
pubmed-author:HsiungY BYB,
pubmed-author:JejerVV,
pubmed-author:KobrakH GHG,
pubmed-author:LaDueJJ,
pubmed-author:LedovskoyAA,
pubmed-author:McBrideP LPL,
pubmed-author:MikelsonsPP,
pubmed-author:RambergE JEJ,
pubmed-author:SchnetzerSS,
pubmed-author:SenyoKK,
pubmed-author:ShawhanP SPS,
pubmed-author:SomalwarS VSV,
pubmed-author:SwallowE CEC,
pubmed-author:TaegarS ASA,
pubmed-author:TesarekR JRJ,
pubmed-author:ToaleP APA,
pubmed-author:TschirhartRR,
pubmed-author:WinsteinBB
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