论文标题
对NLO核Drell-Yan比率的传入Parton能量损失效应的研究
The study of the incoming parton energy loss effect on the NLO nuclear Drell-Yan ratios
论文作者
论文摘要
在接下来的阶顺序计算中，通过包括新的E906测量值在内的Drell-YAN实验数据来研究夸克的初始状态能量损失。此外，还检查了核导致过程中康普顿散射子过程中嵌入的传入的Gluon能量损失效应。使用SW淬火重量（由Salgado和Wiedemann提供）进行DRELL-YAN比的临时阶顺序计算，以评估Quark（Gluon）失去能量的概率分布以及核Parton分布（仅通过对现有的实验数据拟合核结构功能）。发现考虑到传入的夸克能量损失的所获得的计算与实验数据非常吻合，尤其是对于E906数据。此外，在主要的临近领先顺序康普顿散射子过程中体现的传入的gluon能量损失并不明显，这可能是由于drell-yan差分横截面比的形式是夸克动量分数的函数（$ r_ {$ r_ {a_ {a_ {a_ {1}}/a_ __ __ {2}}} ______________________ {1} {1} {1} {2}最小化QCD临近领先顺序校正的影响。
At a next-to-leading order calculation, the initial-state energy loss of the quark is investigated by means of the Drell-Yan experimental data including the new E906 measurements. Furthermore, the incoming gluon energy loss effect embedded in the Compton scattering subprocess of the nuclear Drell-Yan process is also examined. The next-to-leading order computations for Drell-Yan ratios are carried out with the SW quenching weights (provided by Salgado and Wiedemann to evaluate the probability distribution that quark (gluon) loses the energy), as well as the nuclear parton distributions (obtained by only fitting the existing experimental data on nuclear structure functions). It is found that the obtained calculations that consider the incoming quark energy loss agree well with the experimental data particularly for E906 data. In addition, the incoming gluon energy loss embodied in the primary next-to-leading order Compton scattering subprocess is not obvious, which may be due to the form of the Drell-Yan differential cross section ratio as a function of the quark momentum fraction ($R_{A_{1}/A_{2}}(x_{1},x_{2},x_{F})$) minimizes the influence of the QCD next-to-leading order correction.
