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Charmed baryonium

Cotugno, G ; Faccini, R ; Polosa, A D ; Sabelli, C

Physical review letters, 2010-04, Vol.104 (13), p.132005-132005, Article 132005 [Periódico revisado por pares]

United States

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Título:
Charmed baryonium
Autor: Cotugno, G ; Faccini, R ; Polosa, A D ; Sabelli, C
Assuntos: BARYONIUM ; BARYONS ; BOSONS ; CHARM PARTICLES ; CHARMED BARYONS ; ELECTRON-POSITRON INTERACTIONS ; ELEMENTARY PARTICLES ; ENERGY LEVELS ; ENERGY RANGE ; EXCITED STATES ; FERMIONS ; GROUND STATES ; HADRONS ; HYPOTHESIS ; INTERACTIONS ; LEPTON-LEPTON INTERACTIONS ; MASS SPECTRA ; MESONS ; MEV RANGE ; PARTICLE INTERACTIONS ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; QUARKS ; SPECTRA
É parte de: Physical review letters, 2010-04, Vol.104 (13), p.132005-132005, Article 132005
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: 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.
Editor: United States
Idioma: Inglês

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Charmed baryonium

Cotugno, G ; Faccini, R ; Polosa, A D ; Sabelli, C

United States

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