Identifying the structure of near-threshold states from the line shape
文献类型：期刊论文
| 作者 | Chen, GY; Huo, WS; Zhao, Q |
| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2015 |
| 卷号 | 39期号:9页码:93101 |
| 关键词 | X(3872) effective field theory compositeness |
| 通讯作者 | Chen, GY (reprint author), Xinjiang Univ, Dept Phys, Urumqi 830046, Peoples R China. |
| 英文摘要 | We revisit the compositeness theorem proposed by Weinberg in an effective field theory (EFT) and explore criteria which are sensitive to the structure of S-wave threshold states. On a general basis, we show that the wave function renormalization constant Z, which is the probability of finding an elementary component in the wave function of a threshold state, can be explicitly introduced in the description of the threshold state. As an application of this EFT method, we describe the near-threshold line shape of the D*(0)(D) over bar (0) invariant mass spectrum in B -> D*(0)(D) over bar K-0 and determine a nonvanishing value of Z. It suggests that the X(3872) as a candidate of the D*(0)(D) over bar (0) molecule may still contain a small c (c) over bar core. This elementary component, on the one hand, explains its production in the B meson decay via a short-distance mechanism, and on the other hand, is correlated with the D*(0)(D) over bar (0) threshold enhancement observed in the D*(0)(D) over bar (0) invariant mass distributions. Meanwhile, we also show that if Z is non-zero, the near-threshold enhancement of the D*(0)(D) over bar (0) mass spectrum in the B decay will be driven by the short-distance production mechanism. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Nuclear ; Physics, Particles & Fields |
| 关键词[WOS] | COMPOSITE-PARTICLES ; X(3872) ; DECAYS |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/20881]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Chen, GY,Huo, WS,Zhao, Q. Identifying the structure of near-threshold states from the line shape[J]. CHINESE PHYSICS C,2015,39(9):93101. |
| APA | Chen, GY,Huo, WS,&Zhao, Q.(2015).Identifying the structure of near-threshold states from the line shape.CHINESE PHYSICS C,39(9),93101. |
| MLA | Chen, GY,et al."Identifying the structure of near-threshold states from the line shape".CHINESE PHYSICS C 39.9(2015):93101. |
入库方式： OAI收割
来源：理论物理研究所
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