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.

本描述了QQbar_threshold库，该库用于计算在电子正电子对撞机中接近阈值的重夸克-反夸克对的产生截面。预测涵盖了所有目前所知的量子色动力学、电磁弱相互作用、希格斯以及非共振校正，并在非相对论性和弱耦合的联合展开中予以体现。