Doubly heavy tetraquarks in an extended chromomagnetic model  

作　　者：Xin-Zhen Weng Wei-Zhen Deng Shi-Lin Zhu 翁新震;邓卫真;朱世琳(Center of High Energy Physics,Peking University,Beijing 100871,China;School of Physics and Astronomy,Tel Aviv University,Tel Aviv 69978,Israel;School of Physics and State Key Laboratory of Nuclear Physics and Technology,Peking University,Beijing 100871,China;Collaborative Innovation Center of Quantum Matter,Beijing 100871,China)

机构地区：[1]Center of High Energy Physics,Peking University,Beijing 100871,China [2]School of Physics and Astronomy,Tel Aviv University,Tel Aviv 69978,Israel [3]School of Physics and State Key Laboratory of Nuclear Physics and Technology,Peking University,Beijing 100871,China [4]Collaborative Innovation Center of Quantum Matter,Beijing 100871,China

出　　处：《Chinese Physics C》2022年第1期43-66,共24页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(NSFC)(11975033,12070131001)。

摘　　要：Using an extended chromomagnetic model,we perform a systematic study of the masses of doubly heavy tetraquarks.We find that the ground states of the doubly heavy tetraquarks are dominated by the color-triplet ■configuration,which is opposite to that of fully heavy tetraquarks.The combined results suggest that the color-triplet configuration becomes more important when the mass difference between the quarks and antiquarks increases.We find three stable states that lie below the thresholds of two pseudoscalar mesons.They are the I^(P)=01^(+)nnbb tetraquark,I^(P)=1^(+)nncb tetraquark,and J^(P)=1^(+)nsbb tetraquark.

关 键 词：extended chromomagnetic model doubly heavy tetraquarks mass spectrum 

分 类 号：O572.33[理学—粒子物理与原子核物理]