论文标题
计算主要的隆德喷气平面密度
Calculating the primary Lund Jet Plane density
论文作者
论文摘要
最近已提出了Lund-Jet飞机作为具有广泛应用的强大喷气子结构工具。在本文中，我们提供了量子染色体动力学中原发性隆德平面密度的全阶单对数计算，包括耦合的运行，领先的parton的共线效应的贡献，以及占大型和聚类效应的软对数。我们还确定了一个新的聚集对数来源，靠近喷气机的边界，将它们重新定义为未来的工作。然后，我们将全阶结果与精确的临时订单预测匹配。对于现象学应用，我们通过非扰动校正的蒙特卡洛估计来补充扰动计算。在高横向动量时，我们对LUND平面密度的最终预测的精度为5-7％，在扰动区域的下边缘处恶化至约20％，对应于约5 GEV的横向动量。我们将我们的结果与大型 - 哈德隆对撞机的Atlas合作的最新测量结果进行了比较，该协作揭示了整个扰动领域的良好一致性，即下降到约5 GEV。
The Lund-jet plane has recently been proposed as a powerful jet substructure tool with a broad range of applications. In this paper, we provide an all-order single logarithmic calculation of the primary Lund-plane density in Quantum Chromodynamics, including contributions from the running of the coupling, collinear effects for the leading parton, and soft logarithms that account for large-angle and clustering effects. We also identify a new source of clustering logarithms close to the boundary of the jet, deferring their resummation to future work. We then match our all-order results to exact next-to-leading order predictions. For phenomenological applications, we supplement our perturbative calculation with a Monte Carlo estimate of non-perturbative corrections. The precision of our final predictions for the Lund-plane density is 5-7% at high transverse momenta, worsening to about 20% at the lower edge of the perturbative region, corresponding to transverse momenta of about 5 GeV. We compare our results to a recent measurement by the ATLAS collaboration at the Large-Hadron Collider, revealing good agreement across the perturbative domain, i.e. down to about 5 GeV.
