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arXiv 1210.2633hep-phnucl-th
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用夸克模型描述Λ_c(2940)^+的分子D^*N态和Λ_b(6248)的可能存在

Quark model description of the Λ_c(2940)^+ as a molecular D^*N state and the possible existence of the Λ_b(6248)

P. G. Ortega, D. R. Entem, F. Fernández

摘要:

在组分夸克模型中,将Λ_c(2940)^+重子作为一个由核子和D^* 介子组成的分子态来研究。对于J^π=3/2^-通道,发现了一个具有正确结合能的束缚态.计算了部分宽度Λ_c(2940)^+ \to ND和Λ_c(2940)^+ \to N_c π,计算结果与实验数据一致。此外,底伴体\bar B^*N的预测质量为6248 MeV/c^2。

英文摘要:

The Λ_c(2940)^+ baryon is studied in a constituent quark model as a molecular state composed by nucleons and D^* mesons. A bound state with the right binding energy is found for the J^π=3/2^- channel. The partial widths Λ_c(2940)^+\to ND and Λ_c(2940)^+\to Σ_c πare calculated and the results are consistent with the experimental data. Additionally a bottom partner \bar B^*N is predicted with a mass of 6248 MeV/c^2.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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