论文标题
双重tetraquark的diquark-antiquark对称性
Double-heavy tetraquark states with heavy diquark-antiquark symmetry
论文作者
论文摘要
我们在重型diquark-andiquark-symmetry（HDAS）和Chromomagnetic相互作用（CMI）模型（CMI）模型的帮助下，计算$ qq \ bar {q} \ bar {q} \ bar {q} \ bar {q} \ bar {q} \ bar {q} \ bar {q} \ bar {q} \ bar {q} \ bar {q} \ bar {q} \ bar {q} \ bar {q} \ bar {q} \ bar {q} \ bar {q} \ bar {最高旋转的质量（$ j = 2 $）的tetraquarks只有$（qq）_ {\ bar {3} _c}（\ bar {q} \ bar {q} \ bar {q}）_ {3_c} $ cOLLING结构与使用HDAS的传统载体的颜色结构相关。此后，通过CMI模型中的质量分裂确定其伴侣状态的质量。 Our numerical results reveal that: (i) the lightest $cc\bar{n}\bar{n}$ ($n=u,d$) 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）稳定的双底四夸克是最低$ 0（1^+）$ $ $ bb \ bar \ bar {n} \ bar {n} $左右10488 meV（$ \ \ \ \ bb^*$ threshold）低于$ bb^*$ threshold）和最低$ 1/2（1^+）$ 1/2（1^+）$ bb \ bb \ b bar} （$ \ of220 $ meV以下$ bb_s^*/b_sb^*$ threshold）; （iii）最低$ bc \ bar {n} \ bar {n} $ tetraquarks，即最低$ 0（0^+）$在7167 mev和最低$ 0（1^+）$左右7223 MEV，均为7223 MEV，是接近Threshold的州。此外，我们讨论了对双重雄鹿的质量的限制。具体来说，对于最低的非限制四夸克人，我们获得$ t_ {cc} <3965 $ mev，$ t_ {bb} <10627 $ mev和$ t_ {bc} <7199 <7199 $ mev。
We calculate the masses of the $QQ\bar{q}\bar{q}$ ($Q=c,b$; $q=u,d,s$) tetraquark states with the aid of heavy diquark-antiquark symmetry (HDAS) and the chromomagnetic interaction (CMI) model. The masses of the highest-spin ($J=2$) tetraquarks that have only the $(QQ)_{\bar{3}_c}(\bar{q}\bar{q})_{3_c}$ color structure are related with those of conventional hadrons using HDAS. Thereafter, the masses of their partner states are determined with the mass splittings in the CMI model. Our numerical results reveal that: (i) the lightest $cc\bar{n}\bar{n}$ ($n=u,d$) 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 $0(1^+)$ $bb\bar{n}\bar{n}$ around 10488 MeV ($\approx116$ MeV below the $BB^*$ threshold) and the lowest $1/2(1^+)$ $bb\bar{n}\bar{s}$ around 10671 MeV ($\approx20$ MeV below the $BB_s^*/B_sB^*$ threshold); and (iii) the two lowest $bc\bar{n}\bar{n}$ tetraquarks, namely the lowest $0(0^+)$ around 7167 MeV and the lowest $0(1^+)$ around 7223 MeV, are near-threshold states. Moreover, we discuss the constraints on the masses of double-heavy hadrons. Specifically, for the lowest nonstrange tetraquarks, we obtain $T_{cc}<3965$ MeV, $T_{bb}<10627$ MeV, and $T_{bc}<7199$ MeV.
