论文标题
Collins-soper内核用于TMD晶格QCD的进化
Collins-Soper Kernel for TMD Evolution from Lattice QCD
论文作者
论文摘要
Collins-Soper内核将不同能量尺度的横向动量依赖性Parton分布函数（TMDPDF）。对于小的parton横向动量$ q_t \simλ_\ text {qcd} $，此内核是非扰动的，只能通过实验或第一原则计算通过受控的不确定性来确定。这项工作提出了使用量子染色体动力学的晶格配方对Collins-Soper内核的首次探索性测定。在淬火的计算中，$ n_f = 0 $内核是在250 meV $ <q_t <2 $ GEV范围内确定的，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 $q_T\sim Λ_\text{QCD}$, 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.
