X(3872) in lattice QCD with exact chiral symmetry
X(3872) in lattice QCD with exact chiral symmetry
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DOI：
10.1016/j.physletb.2007.01.019
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发表时间：
2006-03
影响因子：
4.4
通讯作者：
Twqcd Collaboration Ting-Wai Chiu;T. Hsieh
中科院分区：
文献类型：
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作者：
Twqcd Collaboration Ting-Wai Chiu;T. Hsieh
在精确手征对称的猝灭格点QCD中，利用分子算符和双夸克-反双夸克算符，研究了含夸克成分（cqc）的1++奇异介子的质量谱。对于分子算符{（q <$γic）（c <$γ 5 q）−（c <$γiq）（q <$γ5c）}和双夸克-反双夸克算符{（qTCγic）（q <$Cγ5c <$T）−（q <$CγiTc <$T）（qTCγ5c）}，两者都在mq→mu的极限检测到质量在3890±30 MeV附近的共振，这自然与X（3872）相一致。此外，还检测到了JPC=1++的较重的奇异介子共振，夸克含量（csc <$s <$）约为4100±50 MeV。
We investigate the mass spectrum of 1++exotic mesons with quark content (cqc¯q¯), using molecular and diquark–antidiquark operators, in quenched lattice QCD with exact chiral symmetry. For the molecular operator {(q¯γic)(c¯γ5q)−(c¯γiq)(q¯γ5c)} and the diquark–antidiquark operator {(qTCγic)(q¯Cγ5c¯T)−(q¯CγiTc¯T)(qTCγ5c)}, both detect a resonance with mass around 3890±30 MeV in the limit mq→mu, which is naturally identified with X(3872). Further, heavier exotic meson resonances with JPC=1++are also detected, with quark content (csc¯s¯) around 4100±50 MeV.