论文标题
混合QCD-ElectRoweak校正在高不变质量区域的LHC上生产DILEPTON
Mixed QCD-electroweak corrections to dilepton production at the LHC in the high invariant mass region
论文作者
论文摘要
我们将混合的QCD-ElectRoweak校正计算为在高不变质量区域中中性电流元素产生的一对无质量瘦素。相对于最终状态粒子，我们的计算是完全差异的。在diLepton不变质量的相对较低的值下，$ m _ {\ ell \ ell \ ell \ el} \ sim 200 $ gev，我们发现以-1％的水平发现了出乎意料的大型混合QCD -ElectRoweak校正。在较高的不变质量下，$ m _ {\ ell \ ell \ el} \ sim 1 $ tev，我们观察到这些更正可以通过QCD和Electroweak校正的乘积很好地近似。因此，由于众所周知的Sudakov增强了后者的增强，它们在较大的不变质量中增加并达到，例如-3％at $ m _ {\ ell \ ell \ ell} = 3 $ tev。最后，我们注意到，混合校正的包含将与Electroweak输入参数的选择相关的理论不确定性降低到低于百分比的水平。
We compute mixed QCD-electroweak corrections to the neutral-current Drell-Yan production of a pair of massless leptons in the high invariant mass region. Our computation is fully differential with respect to the final state particles. At relatively low values of the dilepton invariant mass, $m_{\ell \ell} \sim 200$ GeV, we find unexpectedly large mixed QCD-electroweak corrections at the level of -1%. At higher invariant masses, $m_{\ell \ell} \sim 1$ TeV, we observe that these corrections can be well approximated by the product of QCD and electroweak corrections. Hence, thanks to the well-known Sudakov enhancement of the latter, they increase at large invariant mass and reach e.g. -3% at $m_{\ell \ell} = 3$ TeV. Finally, we note that the inclusion of mixed corrections reduces the theoretical uncertainty related to the choice of electroweak input parameters to below the percent level.
