Abstract
Following recent work on the combination of electroweak and strong radiative corrections to single W-boson hadroproduction in the POWHEG BOX framework, we generalize the above treatment to cover the neutral-current Drell–Yan process. According to the POWHEG method, we combine both the next-to-leading order (NLO) electroweak and the QED multiple photon corrections with the native NLO and Parton Shower QCD contributions. We show comparisons with the predictions of the electroweak generator HORACE, to validate the reliability and accuracy of the approach. We also present phenomenological results obtained with the new tool for physics studies at the LHC.
Highlights
For many physics studies at the LHC, the process of lepton pair production in hadronic collisions, known as neutral current Drell-Yan (NC DY), requires high theoretical accuracy
Following the recent implementation of EW corrections to W production in the POWHEG BOX as described in Ref. [5], here we present the analogous treatment for the NC DY process
We imposed the acceptance and invariant mass cuts quoted in the experimental papers, we focused on the data referring to bare muons and we used the MSTW2008 next-to-leading order (NLO) Parton Distribution Functions (PDFs) set [52]
Summary
For many physics studies at the LHC, the process of lepton pair production in hadronic collisions, known as neutral current Drell-Yan (NC DY), requires high theoretical accuracy. NNLO QCD corrections were combined with NLO EW contributions in FEWZ [20] All these theoretical efforts were made because, given the high-precision measurement of the Z-boson mass at LEP, the NC process is very helpful, if not unavoidable, for detector calibration purposes at LHC and is a standard candle that can be used to constrain the Parton Distribution Functions (PDFs). In the high tail of the transverse momentum and invariant mass distributions of the produced leptons, the NC DY is one of the main irreducible backgrounds to the searches for new particles at the LHC These physics motivations require the simultaneous control of all the relevant QCD and EW higher-order contributions to the NC DY process.
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