Source:http://linkedlifedata.com/resource/pubmed/id/20481876
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| Predicate | Object |
|---|---|
| rdf:type | |
| pubmed:issue |
13
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| pubmed:dateCreated |
2010-5-20
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| pubmed:abstractText |
We reanalyze the published data on the Y(4630)-->Lambda(c) Lambda(c) and the Y(4660)-->psi(2S)pi pi with a consistent ansatz and we find that the two observations are likely to be due to the same state Y(B), produced via initial state radiation (ISR), with M(Y(B))=4660.7+/-8.7 MeV and Gamma(Y(B))=61+/-23 MeV. Under this hypothesis and reanalyzing the e+e- -->J/psi pi pi gamma(ISR) spectrum we find B(Y(B))-->Lambda(c) Lambda(c))/B(Y(B))-->psi(2S)pi pi)=117+/-44, B(Y(B))-->J/psi pi pi)/B(Y(B))-->psi(2S)pi pi)<0.46@90% C.L., B(Y(4350)-->J/psi pi pi)/B(Y(4350)-->psi(2S)pi pi)<3.4x10(-3)@90% C.L., and B(Y(B))-->psi(2S)sigma)/B(Y(B))-->psi(2S)f0)=2.0+/-0.3. These conclusions strongly support the hypothesis of Y(B) being the first observation of a charmed baryonium constituted by four quarks. Analyzing the mass spectrum we show that Y(4350) and Y(B) are, respectively, consistent with the ground state and first radial excitation of the l=1 state.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
Apr
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| pubmed:issn |
1079-7114
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| pubmed:author | |
| pubmed:issnType |
Electronic
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| pubmed:day |
2
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| pubmed:volume |
104
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
132005
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| pubmed:year |
2010
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| pubmed:articleTitle |
Charmed baryonium.
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| pubmed:affiliation |
Department of Physics, Università di Roma, La Sapienza, Piazzale A. Moro 2, Roma, I-00185, Italy.
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| pubmed:publicationType |
Journal Article
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