Study for the pentaquark potential in SU(3) lattice QCD.
Study for the pentaquark potential in SU(3) lattice QCD.
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DOI：
10.1103/physrevlett.94.192001
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发表时间：
2004-07
影响因子：
8.6
通讯作者：
F. Okiharu;H. Suganuma;Toru T. Takahashi
中科院分区：
文献类型：
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作者：
F. Okiharu;H. Suganuma;Toru T. Takahashi
首次研究了SU(3)猝灭晶格QCD中的静态五夸克(5q)势V(5q)。从5q威尔逊环出发，用规范不变的方法计算了V(5q)，并用涂抹方法增强了基态分量。V(5q)可以用OGE+多Y项来很好地描述：单胶子交换(OGE)库仑项和多Y型线性项的总和与连接五个夸克的通量管的最小总长度成正比。通过与Qq和3q势的比较，我们发现弦张力具有普适性，Sigma(Qq)近似Sigma(3q)，近似Sigma(5q)，库仑系数的OGE结果。
We perform the first study of the static pentaquark (5Q) potential V(5Q) in SU(3) quenched lattice QCD with 16(3) x 32 and beta = 6.0. From the 5Q Wilson loop, V(5Q) is calculated in a gauge-invariant manner, with the smearing method to enhance the ground-state component. V(5Q) is well described by the OGE-plus-multi-Y ansatz: a sum of the one-gluon-exchange (OGE) Coulomb term and the multi-Y-type linear term proportional to the minimal total length of the flux tube linking the five quarks. Comparing with QQ and3Q potentials, we find a universality of the string tension, sigma(QQ) approximately sigma(3Q) approximately sigma(5Q), and the OGE result for Coulomb coefficients.