量子色动力学(QCD)求和定则在密物质的结果

Result of QCD sum rule about dense matter

讨论量子色动力学求和定则解决在真空及核物质中强子性质的方法。核物质情况下,关于谱函数的形式和确定的四夸克凝聚的值,初始的限制缺少可靠的唯象信息;这个方法给出了支持强吸引的Lorentz标量和推斥的Lorentz矢量光学势的Dirac唯象图像的适当证据。对介质中减少的矢量介子质量,这个方法提供了弱证据。

The paper discusses the QCD sum rule approach to the properties of hadrons in both the vacuum and nuclear matter. The primary limitation for the nuclear matter is the absence of reliable phenomenological information about the form of spectral function and the value of certain four quark condensates. The approach gives moderate evidence in support of the Dirac phenomenology picture of strong attractive Lorentz scalar and repulsive Lorentz vector optical potentials,but provides weak evidence for decreasing vector meson masses in medium.