| Theoretical study of the d*(2380) -> d pi pi decay width | |
| Dong, Yubing1,2; Shen, Pengnian1,3; Huang, Fei4; Zhang, Zongye1,2 | |
| 刊名 | Physical review c
 |
| 2015-06-29 | |
| 卷号 | 91期号:6页码:6 |
| ISSN号 | 0556-2813 |
| DOI | 10.1103/physrevc.91.064002 |
| 英文摘要 | The decay widths of the d* -> d pi(0)pi(0) and d* -> d pi(+)pi(-) processes are explicitly calculated in terms of our chiral quark model. by using the experimental ratios of cross sections between various decay channels, the partial widths of the d* -> pn pi(0)pi(0), d* -> pn pi(+)pi(-), d* -> pp pi(0)pi(-), and d* -> nn pi(+)pi(0) channels are also extracted. further including the estimated partial width for the d* -> pn process, the total width of the d* resonance is obtained. in the first step of the practical calculation, the effect of the dynamical structure on the width of d* is studied in the single delta delta channel approximation. it is found that the width is reduced by a few tens of mev, in comparison with the one obtained by considering the effect of the kinematics only. this presents the importance of such an effect from the dynamical structure. however, the obtained width with the single delta delta channel wave function is still too large to explain the data. it implies that the d* resonance will not consist of the delta delta structure only, and instead there should be enough room for other structures such as the hidden-color (cc) component. thus, in the second step, the width of d* is further evaluated by using a wave function obtained in the coupled delta delta and cc channel calculation in the framework of the resonating group method (rgm). it is shown that the resultant total width for d* is about 69 mev, which is compatible with the experimental observation of about 75 mev and justifies our assertion that the d* resonance is a hexaquark-dominated exotic state. |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000357026100001 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/1639611 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Shen, Pengnian |
| 作者单位 | 1.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 2.Chinese Acad Sci, TPCSF, Beijing 100049, Peoples R China 3.Guangxi Normal Univ, Coll Phys & Technol, Guilin 541004, Peoples R China 4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 101408, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong, Yubing,Shen, Pengnian,Huang, Fei,et al. Theoretical study of the d*(2380) -> d pi pi decay width[J]. Physical review c,2015,91(6):6. |
| APA | Dong, Yubing,Shen, Pengnian,Huang, Fei,&Zhang, Zongye.(2015).Theoretical study of the d*(2380) -> d pi pi decay width.Physical review c,91(6),6. |
| MLA | Dong, Yubing,et al."Theoretical study of the d*(2380) -> d pi pi decay width".Physical review c 91.6(2015):6. |
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