Exploratory study of possible resonances in heavy meson-heavy baryon coupled-channel interactions

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英文篇名：Exploratory study of possible resonances in heavy meson-heavy baryon coupled-channel interactions 作者：沈超玮 ; Deborah ; Rnchen ; Ulf-G.Meiβner ; 邹冰松 英文作者：Chao-Wei Shen;Deborah Rnchen;Ulf-G.Meiβner;Bing-Song Zou;Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences;University of Chinese Academy of Sciences(UCAS);Helmholtz-Institut für Strahlen-und Kernphysik(Theorie) and Bethe Center for Theoretical Physics, Universitt Bonn; 英文关键词：coupled-channel interactions;;heavy meson;;heavy baryon;;exotic baryons 中文刊名：KNWL 英文刊名：中国物理C 机构：Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences;University of Chinese Academy of Sciences(UCAS);Helmholtz-Institut für Strahlen-und Kernphysik(Theorie) and Bethe Center for Theoretical Physics, Universitt Bonn; 出版日期：2018-02-15 出版单位：Chinese Physics C 年：2018 期：v.42 基金：Supported by DFG and NSFC through funds provided to the Sino-German CRC 110“Symmetry;; the Emergence of Structure in QCD”(NSFC 11621131001,DFG TR110);; NSFC fund(11647601);; supported by the CAS President's International Fellowship Initiative(PIFI)(2017VMA0025) 语种：英文; 页：KNWL201802009 页数：10 CN：02 ISSN：11-5641/O4 分类号：77-86

摘要

We use a unitary coupled-channel model to study the DA_c-D∑_c interactions. In our calculation, SU(3)flavor symmetry is applied to determine the coupling constants. Several resonant and bound states with different spin and parity are dynamically generated in the mass range of the recently observed pentaquarks. The approach is also extended to the hidden beauty sector to study the BΛ_b-B∑_b interactions. As the b-quark mass is heavier than the c-quark mass, there are more resonances observed for the BΛ_b-B∑_b interactions and they are more tightly bound.
        We use a unitary coupled-channel model to study the DA_c-D∑_c interactions. In our calculation, SU(3)flavor symmetry is applied to determine the coupling constants. Several resonant and bound states with different spin and parity are dynamically generated in the mass range of the recently observed pentaquarks. The approach is also extended to the hidden beauty sector to study the BΛ_b-B∑_b interactions. As the b-quark mass is heavier than the c-quark mass, there are more resonances observed for the BΛ_b-B∑_b interactions and they are more tightly bound.

引文

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