Collins-Soper kernel for TMD evolution from lattice QCD
Collins-Soper kernel for TMD evolution from lattice QCD
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DOI：
10.1103/physrevd.102.014511
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发表时间：
1900-01
影响因子：
5
通讯作者：
M. Wagman
中科院分区：
文献类型：
--
作者：
M. Wagman
Collins-Soper 核将不同能量尺度的横向动量相关部分子分布函数 (TMDPDF) 联系起来。对于小部分子横向动量$q_T\sim \Lambda_\text{QCD}$，该核是非微扰的，只能通过实验或第一性原理计算在受控不确定性的情况下确定。这项工作首次利用量子色动力学的晶格公式探索性地确定了 Collins-Soper 核。在淬灭计算中，$N_f=0$ 核在 250 MeV $< q_T < 2$ GeV 范围内确定，并对剩余的系统不确定性进行了分析。
The Collins-Soper kernel relates transverse momentum-dependent parton distribution functions (TMDPDFs) at different energy scales. For small parton transverse momentum $q_T\sim \Lambda_\text{QCD}$, this kernel is non-perturbative and can only be determined with controlled uncertainties through experiment or first-principles calculations. This work presents the first exploratory determination of the Collins-Soper kernel using the lattice formulation of Quantum Chromodynamics. In a quenched calculation, the $N_f=0$ kernel is determined at scales in the range 250 MeV $< q_T < 2$ GeV, and an analysis of the remaining systematic uncertainties is undertaken.