Source:http://linkedlifedata.com/resource/pubmed/id/16605985
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
6
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| pubmed:dateCreated |
2006-4-11
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| pubmed:abstractText |
We performed a coincidence measurement of two nucleons emitted from the nonmesonic weak decay of lambda(5)He formed via the 6Li(pi+, K+) reaction. The energies of the two nucleons and the pair number distributions in the opening angle between them were measured. In both np and nn pairs, we observed a clean back-to-back correlation coming from the two-body weak reactions of lambda p --> np and lambda n --> nn, respectively. The ratio of the nucleon pair numbers was N(nn)/N(np) = 0.45 +/- 0.11(stat) +/- 0.03(syst) in the kinematic region of cos theta(NN) < -0.8. Since each decay mode was exclusively detected, the measured ratio should be close to the ratio of gamma(lambda p --> np)/gamma(lambda n --> nn). The ratio is consistent with recent theoretical calculations based on the heavy meson and/or direct-quark exchange picture.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
Feb
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| pubmed:issn |
0031-9007
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| pubmed:author |
pubmed-author:AjimuraSS,
pubmed-author:AokiKK,
pubmed-author:BanuAA,
pubmed-author:BaoW HWH,
pubmed-author:BhanaRR,
pubmed-author:CoxF NFN,
pubmed-author:FukudaTT,
pubmed-author:HashimotoOO,
pubmed-author:HwangJ IJI,
pubmed-author:KameokaSS,
pubmed-author:KangB HBH,
pubmed-author:KimE HEH,
pubmed-author:KimJ HJH,
pubmed-author:MarutaTT,
pubmed-author:MiuraYY,
pubmed-author:MiyakeYY,
pubmed-author:NagaeTT,
pubmed-author:NakamuraMM,
pubmed-author:NakamuraS NSN,
pubmed-author:NoumiHH,
pubmed-author:OkadaSS,
pubmed-author:OkayasuYY,
pubmed-author:OutaHH,
pubmed-author:ParkHH,
pubmed-author:SahaP KPK,
pubmed-author:SatoYY,
pubmed-author:SekimotoMM,
pubmed-author:TakahashiTT,
pubmed-author:TamuraHH,
pubmed-author:TanidaKK,
pubmed-author:ToyodaAA,
pubmed-author:TsukadaKK,
pubmed-author:WatanabeTT
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| pubmed:issnType |
Print
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| pubmed:day |
17
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| pubmed:volume |
96
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| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
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| pubmed:pagination |
062301
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| pubmed:year |
2006
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| pubmed:articleTitle |
Exclusive measurement of the nonmesonic weak decay of the lambda(5)He hypernucleus.
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| pubmed:affiliation |
Department of Physics, Seoul National University, Seoul 151-742, Korea.
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| pubmed:publicationType |
Journal Article
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