Factorization of e+e− → H X cross section, differential in zh, PT and thrust, in the 2-jet limit
Factorization of e+e− → H X cross section, differential in zh, PT and thrust, in the 2-jet limit
复制标题
e+e− → H X 横截面的因式分解，在 zh、PT 和推力中的微分，在 2 射流极限下
DOI：
10.1007/jhep02(2021)076
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发表时间：
2020
影响因子：
5.4
通讯作者：
A. Simonelli
中科院分区：
文献类型：
--
作者：
M. Boglione;A. Simonelli
当考虑出射强子相对于推力轴的横动量时，因式分解e+e−湮灭中单个强子产生的截面是一个非常重要的任务。我们在一个方案中工作，该方案允许将e+e−→ H X截面分解为可计算的硬系数和横向动量相关（TMD）碎裂函数的卷积。结果，zh、PT和推力的微分，将被给出到扰动理论中的所有阶次，并被明确计算到次领先阶次（NLO）和次领先对数（NLL）精度。从我们的计算中获得的预测，应用最简单和最自然的anasterian模型的非微扰部分的TMD，是在特殊的协议与实验测量的贝儿合作。我们提出的因子分解方案将1-强子和2-强子过程中定义的TMD部分子密度联系起来，恢复了对TMD物理进行全局唯象研究的可能性，包括半包容的深度非弹性散射、Drell-Yan过程、e+e−→ H1 H2 X和e+e−→ HX湮灭的实验数据.
Factorizing the cross section for single hadron production in e+e− annihilations is a highly non trivial task when the transverse momentum of the outgoing hadron with respect to the thrust axis is taken into account. We work in a scheme that allows to factorize the e+e−→ H X cross section as a convolution of a calculable hard coefficient and a Transverse Momentum Dependent (TMD) fragmentation function. The result, differential in zh, PT and thrust, will be given to all orders in perturbation theory and explicitly computed to Next to Leading Order (NLO) and Next to Leading Log (NLL) accuracy. The predictions obtained from our computation, applying the simplest and most natural ansatz to model the non-perturbative part of the TMD, are in exceptional agreement with the experimental measurements of the BELLE Collaboration. The factorization scheme we propose relates the TMD parton densities defined in 1-hadron and 2-hadron processes, restoring the possi- bility to perform global phenomenological studies of TMD physics including experimental data from semi-inclusive deep inelastic scattering, Drell-Yan processes, e+e−→ H1H2X and e+e−→ H X annihilations.
影响因子：
5.4
作者：
Z. Kang;D. Shao;Fanyi Zhao
通讯作者：
Z. Kang;D. Shao;Fanyi Zhao