"parton_abs_ZDelPhiLL_covariance_syst" of "Inclusive and differential cross section measurements of single top quark production in association with a Z boson in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

Covariance matrix for the measurement of the differential cross sections as a function of the difference in azimuthal angle of the leptons, associated to the Z boson candidate at parton level.

该协方差矩阵（Covariance matrix）用于测量以与部分子层次Z玻色子候选粒子相关联的轻子方位角差为自变量的微分散射截面。