Phenomenological study on the decay widths of Υ(nS)→d~*(2380)+X

作     者：Chao-Yi Lu P. Wang Y.B. Dong P. N. Shen Z.Y. Zhang D.M. Li 吕超一;王平;董宇兵;沈彭年;张宗烨;李德民

作者机构：Department of Physics Zhengzhou University Zhengzhou Henan 450001 China Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China Theoretical Physics Center for Science Facilities Chinese Academy of Sciences Beijing 100049 China 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2018年第42卷第6期

页      面：67-72页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 

基　　金：Supported by National Natural Sciences Foundations of China(11475186,11475192,11521505,11565007) the Sino-German CRC110 "Symmetries and the Emergence of Structure in QCD" project by NSFC(11621131001) the Key Research Program of Frontier Sciences,CAS,(Y7292610K1) the IHEP Innovation Fund(Y4545190Y2) 

主　　题：Upsilon decay SU(3) chiral quark model 4^*(2380) production 

摘      要：The decay widths of Υ（nS）→d^＊（2380）＋X with n=1,2,3 are studied in a phenomenological way. With the help of crossing symmetry, the decay widths are obtained by investigating the imaginary part of the forward scattering amplitudes between d^＊ and Υ（nS）. The wave functions of d^＊ and deuteron obtained in previous studies are used for calculating the amplitude. The interaction between d^＊（d） and Υ is governed by the quark-meson interaction, where the coupling constant is determined by fitting the observed widths of Υ（nS）→d＋X. The numerical results show that the decay widths of Υ（nS）→d^＊＋X are about 2-10 times smaller than that of d＋X. The calculated momentum of d^＊ is in the range 0.3-0.8 GeV. Therefore, it is very likely that one can find d^＊（2380） in these semi-inclusive decay processes.