Hyperon-nucleon force from lattice QCD
Hyperon-nucleon force from lattice QCD
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DOI：
10.1016/j.physletb.2009.02.003
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发表时间：
2009-03-16
影响因子：
4.4
通讯作者：
Hatsuda, Tetsuo
中科院分区：
文献类型：
--
作者：
Nemura, Hidekatsu;Ishii, Noriyoshi;Hatsuda, Tetsuo
我们利用等时Bethe-Salpeter波函数计算了质子与奇异度为-2的超子Xi（0）之间的相互作用势。在格点间距等于或等于0.14的情况下，采用淬火格点QCD模拟，在（4.5 fm）（4）格点上有格点规范作用量和Wilson夸克作用量.在我们的研究中，ud夸克的质量对应于m（pi），其值近似等于0.37和0.51 GeV，而s夸克的质量对应于m（K）的物理值。中心pXi（0）势在S-1（0）（S-3（1））通道中具有强（弱）排斥核，r小于或接近0.6 fm，而在两个通道中，该势在中长距离（0.6 fm小于或接近r小于或接近1.2 fm）处具有良好的吸引力。pXi（0）散射长度的符号和它的夸克质量依赖性表明在低能量下两个通道中的净吸引力。(C)2009年由Elsevier B. V.出版
We calculate potentials between a proton and a Xi(0) (hyperon with strangeness -2) through the equal-time Bethe-Salpeter wave function. employing quenched lattice QCD simulations with the plaquette gauge action and the Wilson quark action on (4.5 fm)(4) lattice at the lattice spacing a similar or equal to 0.14 fill. The ud quark mass in our Study corresponds to m(pi) similar or equal to 0.37 and 0.51 GeV, while the s quark mass corresponds to the physical value of m(K). The central p Xi(0) potential has a strong (weak) repulsive core in the S-1(0) (S-3(1)) channel for r less than or similar to 0.6 fm, while the potential has attractive well at medium and long distances (0.6 fm less than or similar to r less than or similar to 1.2 fm) in both channels. The sign of the p Xi(0) scattering length and its quark mass dependence indicate a net attraction in both channels at low energies. (C) 2009 Published by Elsevier B.V.