QQ(Q)over-bar (Q)over-bar states: Masses, production, and decays

被引：159

作者：

Karliner, Marek ^{[1
]}

Nussinov, Shmuel ^{[1
]}

Rosner, Jonathan L. ^{[2
,3
]}

机构：

[1] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[2] Univ Chicago, Enrico Fermi Inst, 5620 South Ellis Ave, Chicago, IL 60637 USA

[3] Univ Chicago, Dept Phys, 5620 South Ellis Ave, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW D | 2017年 / 95卷 / 03期

关键词：

MULTIQUARK HADRONS; RESONANCES; EXOTICS; MODEL;

D O I：

10.1103/PhysRevD.95.034011

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The question of whether there exist bound states of two heavy quarks Q = (c,b) and antiquarks (Q) over bar = ((c) over bar ,(b) over bar), distinct from a pair of quark-antiquark mesons, has been debated for more than forty years. We estimate masses of Q(1)Q(2)(Q) over bar (3) (Q) over bar (4) resonant states X-Q1Q2 (Q) over bar3 (Q) over bar4 and suggest a means of producing and observing them. We concentrate on the cc (c) over bar(c) over bar channel which is most easily produced and the bb (b) over bar(b) over bar channel which has a better chance of being relatively narrow. We obtain M(X-cc (c) over bar(c) over bar) = 6,192 +/- 25 MeV and M(X-bb (b) over bar(b) over bar) = 18,826 +/- 25 MeV, for the J(PC) = 0(++) states involving charmed and bottom tetraquarks, respectively. An experimental search for these states in the predicted mass range is highly desirable.

引用

页数：11

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