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.本文介绍了一款用于计算正负电子对撞机阈值附近重夸克-反夸克对产生截面的QQbar_threshold库。该理论预言包含了目前已知的所有量子色动力学（Quantum Chromodynamics, QCD）、电弱（Electroweak）、希格斯（Higgs）及非共振修正，其推导基于联合非相对论与弱耦合展开框架。