Double-heavy tetraquark states with heavy diquark-antiquark symmetry

作     者：Jian-Bo Cheng Shi-Yuan Li Yan-Rui Liu Zong-Guo Si Tao Yao 程剑波;李世渊;刘言锐;司宗国;姚涛

作者机构：School of PhysicsShandong UniversityJinan 250100China 

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

年 卷 期：2021年第45卷第4期

页      面：70-86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：Supported by National Natural Science Foundation of China (11775130, 11775132, 11635009, 11325525, 11875179) Natural Science Foundation of Shandong Province (ZR2016AM16, ZR2017MA002) 

主　　题：heavy diquark-antiquark symmetry(HDAS) chromomagnetic interaction(CMI)model double-heavy tetraquark mass spectrum 

摘      要：We calculate the masses of the QQqq(Q=c,b:q=u,d,s)tetraquark states with the aid of heavy diquark-antiquark symmetry(HDAS)and the chromomagnetic interaction(CMI)*** masses of the highestspin(J=2)tetraquarks that have only the(QQ)(3):(qq)_(3).color structure are related with those of conventional hadrons using ***,the masses of their partner states are determined with the mass splittings in the CMI *** numerical results reveal that(i)the lightest ccnn(n=u,d)is an I(J^(P))=0(1^(+))state around 3929 MeV(53 MeV above the DD^(*) threshold),and none of the double-charm tetraquarks are stable;(ii)the stable double-bottom tetraquarks are the lowest 0(1^(+))bbin around 10488 MeV(≈116 MeV below the BB^(*)threshold)and the lowest 1/2(1^(+))bbns around 10671 MeV(≈20 MeV below the BB_(s)^(*)/B_(s)B^(*)threshold);and(iii)the two lowest bcnn tetraquarks,namely the lowest 0(0^(+))around 7167 MeV and the lowest 0(1)around 7223 MeV,are in the nearthreshold ***,we discuss the constraints on the masses of double-heavy ***,for the lowest nonstrange tetraquarks,we obtain T_(cc)3965 MeV,T_(bb)10627 MeV,and T_(bc)7199 MeV.