Resonance on top of thresholds: The Lambda(c) (2595)(+) as an extremely fine-tuned state
文献类型：期刊论文
| 作者 | Guo, ZH (reprint author), Hebei Normal Univ, Dept Phys, Shijiazhuang 050024, Peoples R China.; Oller, JA (reprint author), Univ Murcia, Dept Fis, E-30071 Murcia, Spain.; Guo, ZH; Oller, JA; Guo, ZH (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China. |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2016 |
| 卷号 | 93期号:5页码:54014 |
| DOI | http://dx.doi.org/10.1103/PhysRevD.93.054014 |
| 英文摘要 | A dedicated study of the pi Sigma(c) scattering around its threshold is carried out in this work to probe the nature of Lambda(c)(2595)(+). We first demonstrate that the effective range expansion approach fails to work near the Lambda(c)(2595)(+) pole position, due to the presence of a nearby Castillejo-Dalitz-Dyson (CDD) pole around the pi Sigma(c) thresholds. We then develop a general framework to properly handle the situation with a CDD pole accompanied by nearby thresholds, which is first elaborated for the single-channel case and then generalized to the coupled-channel study. The isospin-breaking effects of the three pi Sigma(c) channels with different thresholds are specially taken into account in our study. The finite-width effects from the Sigma(c) baryons are considered and found to be relevant to give the Lambda(c)(2595)(+) width fully compatible with its experimental value. Through the compositeness analysis, our robust conclusion is that the pi(0)Sigma(+)(c) component is subdominant inside the Lambda(c)(2595)(+). |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/21737]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Guo, ZH (reprint author), Hebei Normal Univ, Dept Phys, Shijiazhuang 050024, Peoples R China.; Oller, JA (reprint author), Univ Murcia, Dept Fis, E-30071 Murcia, Spain.; Guo, ZH (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Guo, ZH ,Oller, JA ,Guo, ZH,et al. Resonance on top of thresholds: The Lambda(c) (2595)(+) as an extremely fine-tuned state[J]. PHYSICAL REVIEW D,2016,93(5):54014. |
| APA | Guo, ZH ,Oller, JA ,Guo, ZH,Oller, JA,&Guo, ZH .(2016).Resonance on top of thresholds: The Lambda(c) (2595)(+) as an extremely fine-tuned state.PHYSICAL REVIEW D,93(5),54014. |
| MLA | Guo, ZH ,et al."Resonance on top of thresholds: The Lambda(c) (2595)(+) as an extremely fine-tuned state".PHYSICAL REVIEW D 93.5(2016):54014. |
入库方式： OAI收割
来源：理论物理研究所
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