论文标题
对载体碰撞中载体 - 玻璃横向动量光谱的非扰动贡献
Non-perturbative contributions to vector-boson transverse momentum spectra in hadronic collisions
论文作者
论文摘要
Drell-Yan（DY）载体 - 玻色子产生的实验测量可从大型强子对撞机（LHC）以及低能量对撞机和固定目标实验中获得。在低矢量 - 玻色子横向动量$ q_t $的区域中，这对于在LHC上提取$ W $ -BOSON质量很重要，QCD来自非扰动的Sudakov形态和固有的横向动量分布的贡献。我们使用低$ $ q_t $分解的框架以横向动量依赖（TMD）分布功能来确定从拟合到LHC和低能实验数据确定此类贡献的潜力。我们研究了TMD非扰动效应的不同来源之间的相关性，以及与共线parton分布的相关性。我们强调了在低质量下精确的DY测量值以及横向动量中精细的固定的相关性，以改善对Sudakov进化过程和TMD的长距离贡献的确定。
Experimental measurements of Drell-Yan (DY) vector-boson production are available from the Large Hadron Collider (LHC) and from lower-energy collider and fixed-target experiments. In the region of low vector-boson transverse momenta $q_T$, which is important for the extraction of the $W$-boson mass at the LHC, QCD contributions from non-perturbative Sudakov form factors and intrinsic transverse momentum distributions become relevant. We study the potential for determining such contributions from fits to LHC and lower-energy experimental data, using the framework of low-$q_T$ factorization for DY differential cross sections in terms of transverse momentum dependent (TMD) distribution functions. We investigate correlations between different sources of TMD non-perturbative effects, and correlations with collinear parton distributions. We stress the relevance of accurate DY measurements at low masses and with fine binning in transverse momentum for improved determinations of long-distance contributions to Sudakov evolution processes and TMDs.
