Two-Body Hadronic Weak Decays of Bottomed Hadrons  

作　　者：张颖 何广朝 叶全兴 严大程 华俊 王倩 Ying Zhang;Guangzhao He;Quanxing Ye;Da-Cheng Yan;Jun Hua;Qian Wang(Key Laboratory of Atomic and Subatomic Structure and Quantum Control(MOE),Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter,Institute of Quantum Matter,South China Normal University,Guangzhou 510006,China;Guangdong-Hong Kong Joint Laboratory of Quantum Matter,Guangdong Provincial Key Laboratory of Nuclear Science,Southern Nuclear Science Computing Center,South China Normal University,Guangzhou 510006,China;School of Mathematics and Physics,Changzhou University,Changzhou 213164,China;Southern Center for Nuclear-Science Theory(SCNT),Institute of Modern Physics,Chinese Academy of Sciences,Huizhou 516000,China)

机构地区：[1]Key Laboratory of Atomic and Subatomic Structure and Quantum Control(MOE),Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter,Institute of Quantum Matter,South China Normal University,Guangzhou 510006,China [2]Guangdong-Hong Kong Joint Laboratory of Quantum Matter,Guangdong Provincial Key Laboratory of Nuclear Science,Southern Nuclear Science Computing Center,South China Normal University,Guangzhou 510006,China [3]School of Mathematics and Physics,Changzhou University,Changzhou 213164,China [4]Southern Center for Nuclear-Science Theory(SCNT),Institute of Modern Physics,Chinese Academy of Sciences,Huizhou 516000,China

出　　处：《Chinese Physics Letters》2024年第2期26-35,共10页中国物理快报（英文版）

基　　金：partly supported by the National Natural Science Foundation of China (Grant Nos. 12375073, 12035007, 12205106, and 12105028);Guangdong Provincial Fund (Grant No. 2019QN01X172);Guangdong Major Project of Basic and Applied Basic Research (Grant No. 2020B0301030008);the NSFC and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the funds provided to the Sino-German Collaborative Research Center TRR110 “Symmetries and the Emergence of Structure in QCD” (NSFC Grant No. 12070131001, DFG Project-ID 196253076-TRR 110);supported by the Natural Science Foundation of Jiangsu Province (Grant No. BK20200980)

摘　　要：The structure of light diquarks plays a crucial role in formation of exotic hadrons beyond the conventional quark model, especially with regard to the line shapes of bottomed hadron decays. We study the two-body hadronic weak decays of bottomed baryons and bottomed mesons to probe the light diquark structure and to pin down the quark–quark correlations in the diquark picture. It is found that the light diquark does not favor a compact structure. For instance, the isoscalar diquark [ud] in Λ_(b)^(0) can be easily split and rearranged to form ■via the color-suppressed transition. This provides a hint that the hidden charm pentaquark states produced in Λ_(b)^(0) decays could be the ■chadronic molecular candidates. This quantitative study resolves the apparent conflicts between the production mechanism and the molecular nature of these P_(c) states observed in experiment.

关 键 词：TRANSITION STRUCTURE QUARK 

分 类 号：O572.33[理学—粒子物理与原子核物理]