论文标题
LHC状态下颜色偶极子进近的核横向动量失衡
Nuclear transverse momentum imbalance in the color dipole approach at the LHC regime
论文作者
论文摘要
使用不同模型的偶极式横截面或未集成的gluon分布评估了通过大核的横向动量扩大通过大核的传播，从而导致系数$ c _ {\ Mathcal {f}}}（0，s）$。将数值计算与从LHCB和Alice实验中提取的数据进行比较，以扩大$ J/ψ$。我们发现，描述$ΔP_T^2 $的小型$ x $数据的不同模型与实验相当吻合，特别是为了远期速度。还分析了中心性依赖性，模型与爱丽丝测量值一致。
Transverse momentum broadening of a parton propagating through a large nucleus is evaluated in the color dipole approach using different models for the dipole cross section or unintegrated gluon distribution, which lead to different values of the coefficient $C_{\mathcal{F}}(0,s)$. Numerical calculations are compared to data extracted from LHCb and ALICE experiments for nuclear broadening of $J/ψ$. We find that different models which describe the small-$x$ data predict values of $Δp_T^2$ that agree reasonably well with experiment, specially for forward rapidity. The centrality dependence was also analysed and the models are consistent with the ALICE measurements.
