首页 | 中心概况 | 人员构成 | 科学研究 | 学术活动 | 招贤纳士 | 资源下载 | 联系我们 | English Version

Eur. Phys. J. C 80, 140 (2020)

# Study on  ${\mathrm{\Xi }}_{cc}\to {\mathrm{\Xi }}_{c}$and  ${\mathrm{\Xi }}_{cc}\to {\mathrm{\Xi }}_{c}^{\prime }$weak decays in the light-front quark model

Hong-Wei Ke1,*, Fang Lu1, Xiao-Hai Liu1 & Xue-Qian Li2

1 School of Science, Tianjin University, Tianjin, 300072, China

2 School of Physics, Nankai University, Tianjin, 300071, China

* khw020056@tju.edu.cn

Abstract

In this work we study the weak decays of  ${\mathrm{\Xi }}_{cc}\to {\mathrm{\Xi }}_{c}$ and  ${\mathrm{\Xi }}_{cc}\to {\mathrm{\Xi }}_{c}^{\prime }$ in the light-front quark model. Generally, a naive, but reasonable conjecture suggests that the cc subsystem in  ${\mathrm{\Xi }}_{cc}$ ( us pair in  ) stands as a diquark with definite spin and color assignments. During the concerned processes, the diquark of the initial state is not a spectator, namely must be broken. A Racah transformation would decompose the original (cc)q into a combination of c(cq) components. Thus we may deal with the decaying c quark alone while keeping the (cq) subsystem as a spectator. With the re-arrangement of the inner structure we calculate the form factors numerically and then obtain the rates of semi-leptonic decays and non-leptonic decays, which will be measured in the future.

 天津大学理学院 量子交叉研究中心   地址：天津津南区 雅观路135号 天津大学北洋园校区32楼146 Center for Joint Quantum Studies, School of Science, Tianjin University     Address : Yaguan Road 135, Jinnan District, 300350 Tianjin, P. R. China