Mixed QCD-electroweak corrections to dilepton production at the LHC in the high invariant mass region

Journal of High Energy Physics

Andreas von Manteuffel¹  Chiara Signorile-Signorile²  Kirill Melnikov²  Matthias Heller³  Fabrizio Caola⁴  Federica Devoto⁴  Herschel A. Chawdhry⁴  Federico Buccioni⁴  Raoul Röntsch⁵ 

[1] Department of Physics and Astronomy, Michigan State University;Institute for Theoretical Particle Physics, KIT;PRISMA+ Cluster of Excellence, Institut für Kernphysik, Johannes Gutenberg Universität;Rudolf Peierls Centre for Theoretical Physics, University of Oxford;Tif Lab, Dipartimento di Fisica, Universitá di Milano and INFN, Sezione di Milano;

关键词: Electroweak Precision Physics;    Higher Order Electroweak Calculations;    Higher-Order Perturbative Calculations;   

DOI  :  10.1007/JHEP06(2022)022

来源: DOAJ

【 摘 要 】

Abstract 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 e.g. −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.

【 授权许可】

Unknown