论文标题
横向动量依赖的碎片函数来自最近的Belle数据
Transverse Momentum Dependent Fragmentation Functions from recent BELLE data
论文作者
论文摘要
一种新的形式主义，用于分解$ e^+e^ - $ e^ - $ nihihilations，$ z_h $，$ p_t $ and thrust的差异的单个强子生产的新形式主义，应用于Belle协作最近测量的数据的现象学分析。在此方案中，$ e^+e^ - \ to hx $横截面可以在可扰动的可计算系数和通用横向动量依赖性碎片函数的卷积中重铸。在进行该过程的扰动部分以进行临近领导的对数准确性的临时订单计算时，我们检查并彻底讨论并讨论了许多可能的ANSATZ对这个通用横向动量依赖性片段的非扰动部分模拟的适用性，并显示了当前的实验数据实际上可以限制其形状和proft $ z $ p $ p $ p prop的程度。
A new formalism for the factorization of the cross section for single hadron production in $e^+e^-$ annihilations, differential in $z_h$, $P_T$ and thrust, is applied to the phenomenological analysis of data recently measured by the BELLE Collaboration. Within this scheme the $e^+e^- \to hX$ cross section can be recast in the convolution of a perturbatively calculable coefficient and a universal transverse momentum dependent fragmentation function. While performing a next-to-leading order calculation of the perturbative part of the process to next-to-leading logarithmic accuracy, we examine and thoroughly discuss the suitability of a number of possible ansatz to model the non-perturbative part of this universal transverse momentum dependent fragmentation function, showing the extent to which present experimental data can actually constrain its shape and functional form in terms of $z_h$, $P_T$ and thrust.
