Lattice QCD Study for the Interquark Force in Three-Quark and Multi-Quark Systems
Lattice QCD Study for the Interquark Force in Three-Quark and Multi-Quark Systems
复制标题
DOI：
10.1063/1.1920939
复制
发表时间：
2004-12
期刊：
影响因子：
--
通讯作者：
H. Suganuma;Toru T. Takahashi;F. Okiharu;H. Ichie
中科院分区：
文献类型：
--
作者：
H. Suganuma;Toru T. Takahashi;F. Okiharu;H. Ichie
研究了SU(3)晶格QCD中的三夸克势和多夸克势。通过对300多种不同模式的3Q系统的精确计算，得出静态基态3Q电位V3Qg.s。发现库仑加Y型线性势（Y‐Ansatz）在1%的水平偏差内可以很好地描述。作为Y - Ansatz的明确证据，Y型通量管的形成实际上是在最大阿贝尔投影QCD的晶格上观察到的。对于大约100种3Q系统的模式，我们对第一激发态3Q电位v3q .s进行了精确的计算。通过对角化三夸克存在下的QCD哈密顿量，并找到一个大的胶子激发能ΔE3Q≡V3Qe.s。−V3Qg.s。这为夸克模型的成功提供了一个物理原因。“逆Mercedes Ansatz”重现了ΔE3Q，这表明胶子激发模式具有复杂的体激发。我们还研究了晶格QCD中的四夸克势和五夸克势，发现它们可以很好地用O…
We study three‐quark and multi‐quark potentials in SU(3) lattice QCD. From accurate calculations for more than 300 different patterns of 3Q systems, the static ground‐state 3Q potential V3Qg.s. is found to be well described by the Coulomb plus Y‐type linear potential (Y‐Ansatz) within 1%‐level deviation. As a clear evidence for Y‐Ansatz, Y‐type flux‐tube formation is actually observed on lattices in maximally‐Abelian projected QCD. For about 100 patterns of 3Q systems, we perform accurate calculations for the 1st excited‐state 3Q potential V3Qe.s. by diagonalizing the QCD Hamiltonian in presence of three quarks, and find a large gluonic‐excitation energy ΔE3Q ≡ V3Qe.s. − V3Qg.s. of about 1 GeV, which gives a physical reason on success of the quark model. ΔE3Q is found to be reproduced by “inverse Mercedes Ansatz”, which indicates a complicated bulk excitation for the gluonic‐excitation mode. We study also tetra‐quark and penta‐quark potentials in lattice QCD, and find that they are well described by the O...