Y(4260) as a mixed charmonium-tetraquark state
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
24/10/2013
24/10/2013
2012
|
| Resumo |
Using the QCD sum rule approach we study the Y(4260) state assuming that it can be described by a mixed charmonium-tetraquark current with J(PC) = 1(--) quantum numbers. For the mixing angle around theta approximate to (53.0 +/- 0.5)degrees, we obtain a value for the mass which is in good agreement with the experimental mass of the Y(4260). For the decay width into the channel Y -> J/psi pi pi we find the value Gamma(Y -> J/psi pi pi) approximate to (4.1 +/- 0.6) MeV, which is much smaller than the total experimental width Gamma approximate to (95 +/- 14) MeV. However, considering the experimental upper limits for the decay of the Y(4260) into open charm, we conclude that we cannot rule out the possibility of describing this state as a mixed charmonium-tetraquark state. DOI: 10.1103/PhysRevD.86.116012 FAPESP FAPESP CNPq CNPq |
| Identificador |
PHYSICAL REVIEW D, COLLEGE PK, v. 86, n. 11, supl. 1, Part 4, pp. 1659-1670, DEC 27, 2012 1550-7998 http://www.producao.usp.br/handle/BDPI/35987 10.1103/PhysRevD.86.116012 |
| Idioma(s) |
eng |
| Publicador |
AMER PHYSICAL SOC COLLEGE PK |
| Relação |
PHYSICAL REVIEW D |
| Direitos |
openAccess Copyright AMER PHYSICAL SOC |
| Palavras-Chave | #QCD SUM-RULES #DECAY #MESONS #RESONANCE #VACUUM #LIGHT #ASTRONOMY & ASTROPHYSICS #PHYSICS, PARTICLES & FIELDS |
| Tipo |
article original article publishedVersion |
