论文标题
哈德子和颜色透明度现象的扰动QCD核心
Perturbative QCD Core of Hadrons and Color Transparency Phenomena
论文作者
论文摘要
在当前的论文中，我们认为强子的基态包含颜色量规不变性以及手性和gluon真空凝结物值的结果。局部电流的真空矩阵元素与适当量子数的真空矩阵元素的分散总和规则（DSR）中的评估导致核子的PQCD核心半径的值约为0.4---0.5 fm。选择初始状态和最终状态允许选择弹丸中PQCD核心对过程的主要贡献的过程。 It is explained that the transparency of nuclear matter for the propagation of a spatially small and color-neutral wave packet of quarks and gluons -- a color transparency (CT) phenomenon -- for a group of hard processes off nuclear targets can be derived in the form of the QCD factorization theorem accounting for the color screening phenomenon Based on the success of the method of DSR, we argue that a pQCD core in a强子波函数被由与夸克和Gluon冷凝物相互作用的夸克组成的层所包围。结果，在准弹性过程中，$ e+a \ to e'+n+（a-1）^{*} $，准 - 弗尼曼机制可以在动量传输平方的广泛范围内占主导地位，$ q^2 $。在这种情况下，一个虚拟光子被单个夸克吸收，该夸克带有核子动量的很大一部分，并在$ q^2 $的范围内占主导地位。 CT应在这些过程中以极大的$ q^2 $在这些过程中表现出来，这是由于sudakov形式的存在而导致的，从而挤压了核子。
In the current paper, we argue that the ground state of a hadron contains a significant perturbative quantum chromodynamics (pQCD) core as the result of color gauge invariance and of the values of chiral and gluon vacuum condensates. The evaluation within the method of dispersion sum rules (DSR) of the vacuum matrix elements of the correlator of local currents with the proper quantum numbers leads to the value of the radius of the pQCD core of a nucleon of about 0.4--0.5 fm. The selection of the initial and final states allows to select processes in which the pQCD core of the projectile gives the dominant contribution to the process. It is explained that the transparency of nuclear matter for the propagation of a spatially small and color-neutral wave packet of quarks and gluons -- a color transparency (CT) phenomenon -- for a group of hard processes off nuclear targets can be derived in the form of the QCD factorization theorem accounting for the color screening phenomenon Based on the success of the method of DSR, we argue that a pQCD core in a hadron wave function is surrounded by the layer consisting of quarks interacting with quark and gluon condensates. As a result, in the quasi-elastic processes $e+A\to e'+N +(A-1)^{*}$, the quasi-Feynman mechanism could be dominating in a wide range of the momentum transfer squared, $Q^2$. In this scenario, a virtual photon is absorbed by a single quark, which carries a large fraction of the momentum of the nucleon and dominates in a wide range of $Q^2$. CT should reveal itself in these processes at an extremely large $Q^2$ as the consequence of the presence of the Sudakov form factors, which squeeze a nucleon.
