论文标题
Bjorken变量和夸克传输系数的量表依赖性在核中半精致的Lepton产生中
Bjorken variable and scale dependence of quark transport coefficient in semi-inclusive lepton-production of hadron off nuclei
论文作者
论文摘要
深度非弹性Lepton-Nucleus散射中强子产生的核修饰可用于研究冷核物质中的Parton繁殖机制。通过基于BDMPS形式主义具有靶核几何效应的BDMPS形式主义的分析参数化，进行强子多重比的领先计算与Hermes充电的Pions Poffication Boffication the Quarks在原子核之外发生的夸克产生数据相比。在深度非弹性散射中，夸克传输系数与可测量的运动学变量之间发现了关系。在夸克运输系数上提出了四个模型。恒定模型，幂律模型和双重幂律模型可以被排除，这是因为实验事实是，横向动量扩大随光子虚拟性$ q^2 $的函数而增加。夸克传输系数是根据Bjorken变量$ x $和比例$ q^2 $确定的。夸克运输系数在Bjorken变量$ x $和比例$ Q^2 $方面的趋势在质量上与Hermes关于横向动量拓宽的实验数据部分是一致的。希望我们的努力有利于理解相对论重离子碰撞中的喷气淬火现象。
Nuclear modification of hadron production in deep inelastic lepton-nucleus scattering can be applied to study the parton propagation mechanism in cold nuclear matter. By means of the analytic parameterization of quenching weight based on BDMPS formalism with the target nuclear geometry effect, the leading-order computations for hadron multiplicity ratios are performed with comparison to the HERMES charged pions production data on the quarks hadronization occurring outside the nucleus. The relation is discovered between quark transport coefficient and the measurable kinematic variables in deep inelastic scattering. Four models are proposed on the quark transport coefficient. The constant model, the power-law model and the double power-law model can be ruled out because of the experimental fact that the transverse momentum broadening increases as a function of the photon virtuality $Q^2$. The quark transport coefficient is determined as a function of the Bjorken variable $x$ and scale $Q^2$. The trend of quark transport coefficient in respect of Bjorken variable $x$ and scale $Q^2$ is qualitatively in partial agreement with HERMES experimental data on transverse momentum broadening. It is hoped that our effort is conducive to understanding of jet quenching phenomenon in relativistic heavy ion collisions.
