Apr 16 – 20, 2018
Kobe University Convention Centre / Kobe International Conference Center
Asia/Tokyo timezone

Bottom quark effects on the ptZ spectrum and the W mass determination

Apr 18, 2018, 2:30 PM


WG4: Hadronic and Electroweak Observables WG4: Hadronic and Electroweak Observables


Alessandro Vicini (Università degli Studi e INFN Milano (IT))


We study lepton-pair production in association with bottom quarks at the LHC,
and present the predictions obtained at next-to-leading order in QCD,
both at fixed order and matched with a QCD parton shower, for several differential distributions.
We discuss the estimate of the theoretical uncertainties
and consider the dependence on the perturbative QCD scales (renormalisation, factorisation and shower),
we compare different parton shower models and matching schemes.
We focus on the inclusive lepton-pair transverse momentum distribution,
and propose a simple procedure to accurately include bottom quark effects,
beyond the standard massless approximation.
We estimate how this alternative formulation may affect the tuning of QCD parton shower parameters
and in turn we extrapolate its impact in the simulation of charged-current Drell-Yan observables
and in the W boson mass determination.

Primary author

Alessandro Vicini (Università degli Studi e INFN Milano (IT))

Presentation materials