https://www.bagnaschi.eu/tags/mw/ Recent content in MW on Emanuele Bagnaschi's home page Hugo -- gohugo.io en Sun, 29 Nov 2020 15:50:06 +0100 https://www.bagnaschi.eu/science/articles/mw_pdf/ Sun, 29 Nov 2020 15:50:06 +0100 https://www.bagnaschi.eu/science/articles/mw_pdf/ Emanuele Bagnaschi (PSI), Alessandro Vicini (CERN and INFN Milan) e-Print: 1910.04726 [hep-ph] We discuss the determination of electroweak parameters from hadron collider observables, focusing on the W boson mass measurement. We revise the procedures adopted in the literature to include in the experimental analysis the uncertainty due to our imperfect knowledge of the proton structure. We show how the treatment of the proton parton density functions (PDFs) uncertainty as a source of systematic error, leads to the automatic inclusion in the fit of the bin-bin correlation of the kinematic distributions with respect to PDF variations. https://www.bagnaschi.eu/science/articles/bottom_wmass/ Sun, 29 Nov 2020 15:22:23 +0100 https://www.bagnaschi.eu/science/articles/bottom_wmass/ Emanuele Bagnaschi (DESY), Fabio Maltoni (Louvain U., CP3), Alessandro Vicini (Milan U. and INFN, Milan), Marco Zaro (NIKHEF, Amsterdam and Paris, LPTHE) JHEP 07 (2018) 101 DOI: 10.1007/JHEP07(2018)101 e-Print: 1803.04336 [hep-ph] 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 (${\tt Pythia8}$ and ${\tt Herwig++}$) and matching schemes (${\tt MC@NLO}$ and ${\tt POWHEG}$).