Exotic QQ(q)over-bar(q)over-bar, QQ(q)over-bar(s)over-bar, and QQ(s)over-bar(s)over-bar states

被引：113
作者：
Du, Meng-Lin [1 ,2 ]
Chen, Wei [1 ,2 ]
Chen, Xiao-Lin [1 ,2 ]
Zhu, Shi-Lin [1 ,2 ,3 ]
机构：
[1] Peking Univ, Dept Phys, Beijing 100871, Peoples R China
[2] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
[3] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
来源：
PHYSICAL REVIEW D | 2013年 / 87卷 / 01期
基金：
中国国家自然科学基金;
关键词：
QCD SUM-RULES; HEAVY TETRAQUARKS; QUARK MASS; BARYONS; MESONS; CHARM;
D O I：
10.1103/PhysRevD.87.014003
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
After constructing the possible J(P) = 0(-), 0(+), 1(-), and 1(+) QQ (q) over bar(q) over bar tetraquark interpolating currents in a systematic way, we investigate the two-point correlation functions and extract the corresponding masses with the QCD sum rule approach. We study the QQ (q) over bar(q) over bar, QQ (q) over bar(s) over bar, and QQ (s) over bar(s) over bar systems with various isospins I = 0, 1/2, 1. Our numerical analysis indicates that the masses of doubly bottomed tetraquark states are below the threshold of the two-bottom mesons, two-bottom baryons, and one doubly bottomed baryon plus one antinucleon. Very probably these doubly bottomed tetraquark states are stable. DOI: 10.1103/PhysRevD.87.014003
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页数：29
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