Some remarks on compositeness of T_(cc)^(+)

作     者：陈畅 孟策 肖志广 郑汉青 Chang Chen;Ce Meng;Zhiguang Xiao;Han-Qing Zheng

作者机构：Department of PhysicsPeking UniversityBeijing 100871China College of PhysicsSichuan UniversityChengdu 610065China 

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

年 卷 期：2024年第48卷第4期

页      面：51-58页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：the National Nature Science Foundations of China(12335002,12375078,11975028) H.Q.Zheng and Z.Xiao are also Supported by"the Fundamental Research Funds for the Central Universities" 

主　　题：exotic mesons strong interaction hadron-hadron interactions scattering matrix bound state 

摘      要：Recently,the LHCb experimental group found an exotic state T_(cc)^(+) from the pp→D^(0)D^(0)π^(+)+X process.A key question is whether it is just a molecule or may have a confined tetraquark *** investigate this,different methods were used,including a two-channel(D^(∗)+D^(0) and D^(∗)0D^(+))K-matrix unitarization and a single-channel Flatté-like parametrization method analyzed utilizing the pole counting rule and spectral density function sum *** analyses demonstrated that T_(cc)^(+) is a molecular state,although the possibility that there may exist an elementary ingredient cannot be excluded,according to an approximate analysis of its production rate.