论文标题
混合的QCD-电子校正校正了LHC的shell Z生产
Mixed QCD-electroweak corrections to on-shell Z production at the LHC
论文作者
论文摘要
我们介绍了混合QCD-ElectRoweak校正的第一个完整计算，以生产强子碰撞中的壳$ z $玻色子，并腐烂到无质量的带电瘦素。对于最终状态QCD部分和已解析的光子，我们的计算是完全差异的，使我们能够计算出与$ pp \ to z \ to z \ to l^+ l^ - $过程中的任何可观察到的基础安全可观察到的相关性，即$ z $ boson在外壳上。尽管混合的QCD-ElectRoweak校正较小，但在每磨级别的情况下，我们观察到QCD-Qed和QCD-Weak贡献之间的相互作用是微妙且可观察到的。因此，如果需要$ {\ cal o}（α__{ew}α_s）$精度，则不可能避免计算一个或另一个。
We present the first complete calculation of mixed QCD-electroweak corrections to the production of on-shell $Z$ bosons in hadron collisions and their decays to massless charged leptons. Our computation is fully differential with respect to final state QCD partons and resolved photons, allowing us to compute any infra-red safe observable pertinent to the $pp \to Z \to l^+ l^-$ process in the approximation that the $Z$ boson is on shell. Although mixed QCD-electroweak corrections are small, at about the per mill level, we observe that the interplay between QCD-QED and QCD-weak contributions is subtle and observable-dependent. It is therefore not possible to avoid computing one or the other if ${\cal O}(α_{EW} α_s)$ precision is desired.
