Near-threshold production of heavy quarks with QQbar_threshold

We describe the QQbar_threshold library for computing the production cross section of heavy quark–antiquark pairs near threshold at electron-positron colliders. The prediction includes all presently known QCD, electroweak, Higgs, and nonresonant corrections in the combined nonrelativistic and weak-coupling expansion.本文介绍了QQbar阈值库（QQbar_threshold library），该库用于计算正负电子对撞机阈值附近重夸克-反夸克对的产生截面。其理论预言涵盖了当前已知的全部量子色动力学（Quantum Chromodynamics, QCD）、电弱相互作用（Electroweak）、希格斯（Higgs）及非共振修正，且基于联合非相对论展开与弱耦合展开的统一计算框架。