Masses of tetraquarks with two heavy quarks in the relativistic quark model

被引：176

作者：

Ebert, D. ^{[1
]}

Faustov, R. N. ^{[1
,2
]}

Galkin, V. O. ^{[1
,2
]}

Lucha, W. ^{[3
]}

机构：

[1] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[2] Russian Acad Sci, Dorodnicyn Comp Ctr, Moscow 119991, Russia

[3] Austrian Acad Sci, Inst High Energy Phys, A-1050 Vienna, Austria

来源：

PHYSICAL REVIEW D | 2007年 / 76卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.76.114015

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Masses of tetraquarks with two heavy quarks and open charm and bottom are calculated in the framework of the diquark-antidiquark picture in the relativistic quark model. All model parameters were regarded as fixed by previous considerations of various properties of mesons and baryons. The light quarks and diquarks are treated completely relativistically. The c quark is assumed to be heavy enough to make the diquark configurations dominating. The diquarks are considered not to be pointlike but to have an internal structure which is taken into account by the calculated diquark form factor entering the diquark-gluon interaction. It is found that all the (cc)((q) over bar(q) over bar') tetraquarks have masses above the thresholds for decays into open charm mesons. Only the I(J(P))=0(1(+)) state of (bb)((u) over bar(d) over bar) lies below the BB* threshold and is predicted to be narrow.

引用

页数：8

共 35 条

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