论文标题
TMD分布中的PDF偏差和风味依赖性
PDF bias and flavor dependence in TMD distributions
论文作者
论文摘要
横向动量依赖性（TMD）分布与小横向距离的极限相匹配的沿线parton密度函数（PDF），这是由TMD分布的全局提取来解释的。我们研究了共线PDF值和不确定性对确定非偏振TMD分布的影响，以及在低横向动量下的Drell-Yan（DY）和Z-Boson生产测量的描述。我们首次考虑了依赖风味的非扰动TMD轮廓。我们进行贝叶斯分析，将PDF不确定性的传播纳入TMD提取物中。我们发现共线PDF不确定性和非扰动TMD风味依赖性对于获得可靠的TMD确定至关重要，应包括在未来的全球分析中。
Transverse momentum dependent (TMD) distributions match collinear parton density functions (PDF) in the limit of small transverse distances, which is accounted for by global extractions of TMD distributions. We study the influence of the collinear PDF value and uncertainties on the determination of unpolarized TMD distributions and the description of Drell-Yan (DY) and Z-boson production measurements at low transverse momenta. We take into account, for the first time, flavor-dependent non-perturbative TMD profiles. We carry out a Bayesian analysis to incorporate the propagation of PDF uncertainties into TMD extractions. We find that collinear PDF uncertainties and non-perturbative TMD flavor dependence are both essential to obtain reliable TMD determinations, and should be included in future global analyses.
