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Theoretical study of the d*(2380) -> d pi pi decay width
Dong YB(董宇兵); Shen PN(沈彭年); Dong, YB; Shen, PN; Huang, F; Zhang, ZY; Zhang ZY(张宗烨)
2015
发表期刊PHYSICAL REVIEW C
卷号91期号:6页码:64002
通讯作者董宇兵
文章类型Article
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.
学科领域Physics
DOI10.1103/PhysRevC.91.064002
收录类别SCI ; CA
WOS类目Physics, Nuclear
WOS记录号WOS:000357026100001
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被引频次:20[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228391
专题院士
推荐引用方式
GB/T 7714
Dong YB,Shen PN,Dong, YB,et al. Theoretical study of the d*(2380) -> d pi pi decay width[J]. PHYSICAL REVIEW C,2015,91(6):64002.
APA 董宇兵.,沈彭年.,Dong, YB.,Shen, PN.,Huang, F.,...&张宗烨.(2015).Theoretical study of the d*(2380) -> d pi pi decay width.PHYSICAL REVIEW C,91(6),64002.
MLA 董宇兵,et al."Theoretical study of the d*(2380) -> d pi pi decay width".PHYSICAL REVIEW C 91.6(2015):64002.
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