☆ 4.5 Article

Σc(D)over-bar and Λc(D)over-bar states in a chiral quark model

PHYSICAL REVIEW C (2011)

期刊

PHYSICAL REVIEW C

卷 84, 期 1, 页码 -

出版社

AMER PHYSICAL SOC

DOI: 10.1103/PhysRevC.84.015203

关键词

-

类别

Physics, Nuclear

资金

National Natural Science Foundation of China [10875133, 10821063]
Ministry of Science and Technology of China [2009CB825200]
China Postdoctoral Science Foundation [20100480468]
COSY FFE [41788390 (COSY-058)]

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Reagent

摘要

The S-wave Sigma(c)(D) over bar and Lambda(c)(D) over bar states with isospin I = 1/2 and spin S = 1/2 are dynamically investigated within the framework of a chiral constituent quark model by solving a resonating group method equation. The results show that the interaction between Sigma(c) and (D) over bar is attractive, which consequently results in a Sigma(c)(D) over bar bound state with a binding energy of about 5-42 MeV, unlike the case of the Lambda(c)(D) over bar state, which has a repulsive interaction and thus is unbound. The channel-coupling effect of Sigma(c)(D) over bar and Lambda(c)(D) over bar is found to be negligible owing to the fact that the gap between the Sigma(c)(D) over bar and Lambda(c)(D) over bar thresholds is relatively large and the Sigma(c)(D) over bar and Lambda(c)(D) over bar transition interaction is weak.

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