Mixed QCD-electroweak corrections to dilepton production at the LHC in the high invariant mass region
Mixed QCD-electroweak corrections to dilepton production at the LHC in the high invariant mass region
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DOI：
10.1007/jhep06(2022)022
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发表时间：
2022-03
影响因子：
5.4
通讯作者：
F. Buccioni;F. Caola;Herschel A. Chawdhry;Federica Devoto;M. Heller;A. von Manteuffel;K. Melnikov;R. Röntsch;C. Signorile-Signorile-C.-Signorile-Signorile-1404887353
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文献类型：
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作者：
F. Buccioni;F. Caola;Herschel A. Chawdhry;Federica Devoto;M. Heller;A. von Manteuffel;K. Melnikov;R. Röntsch;C. Signorile-Signorile-C.-Signorile-Signorile-1404887353
本文计算了在高不变质量区中一对无质量轻子的中性流Drell-Yan产生的混合QCD-电弱修正。我们的计算对于末态粒子是完全微分的。在相对较低的双轻子不变质量m = 200 GeV时，我们意外地发现了-1%的混合QCD-电弱修正。在较高的不变质量，m 1 TeV，我们观察到，这些修正可以很好地近似的产品QCD和电弱修正。因此，由于后者的著名的苏达科夫增强，它们在大不变质量时增加，并在m = 3 TeV时达到eg− 3%。最后，我们注意到，包括混合校正降低了理论的不确定性有关的电弱输入参数的选择低于百分之一的水平。
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 ℓℓ∼ 200 GeV, we find unexpectedly large mixed QCD-electroweak corrections at the level of− 1%. At higher invariant masses, m ℓℓ∼ 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 eg− 3% at m ℓℓ= 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.