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| Preprint/Report | PUBDB-2018-01499 |
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2018
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Please use a persistent id in citations: doi:10.3204/PUBDB-2018-01499
Report No.: CP3-18-16; DESY-18-024; NIKHEF/2018-008; TIF-UNIMI 2018-2; arXiv:1803.04336
Abstract: We perform a study of lepton-pair production in association with bottom quarks at the LHC based on the predictions obtained at next-to-leading order in QCD, both at fixed order and matched with a QCD parton shower. We consider a comprehensive set of observables and estimate the associated theoretical uncertainties by studying the dependence on the perturbative QCD scales (renormalisation, factorisation and shower) and by comparing different parton-shower models (Pythia8 and Herwig++) and matching schemes (MadGraph5_aMC@NLO and POWHEG). Based on these results, we propose a simple procedure to include bottom-quark effects in neutral-current Drell-Yan production, going beyond the standard massless approximation. Focusing on the inclusive lepton-pair transverse-momentum distribution $p_{\bot}^{l^+l^-}$, we quantify the impact of such effects on the tuning of the simulation of charged-current Drell-Yan observables and the $W$-boson mass determination.
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Report/Journal Article
Lepton-pair production in association with a $\mathrm{b\bar{b}}$ pair and the determination of the $W$ boson mass
Journal of high energy physics 1807(07), 101 (2018) [10.1007/JHEP07(2018)101]
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