10-14 December 2018
Auditorium Santa Cecilia , Perugia, Italy
Europe/Zurich timezone
2008 - 2018

MC Modelling and Tuning in CMS

13 Dec 2018, 16:20
Auditorium Santa Cecilia , Perugia, Italy

Auditorium Santa Cecilia , Perugia, Italy

Via Fratti, 2 - 06123 Perugia Italy


Gurpreet Singh Chahal (Imperial College and IPPP Durham University (GB))


A new set of CMS underlying-event tunes is presented for the PYTHIA 8 event generator. The tunes use the NNPDF3.1 parton distribution functions at leading (LO), next-to-leading (NLO), or next-to-next-to-leading (NNLO) order in perturbative quantum chromodynamics, and the strong coupling evolution at LO or NLO. Comparisons of the predictions of the new tunes are provided for observables sensitive to the global underlying event, to soft multiparton interactions, and to double-parton scattering contributions, as well as for observables measured in various final states, such as multijet, Drell-Yan, and top quark-antiquark pair production. The measurements characterizing the properties of the underlying event in top quark pair production and the Drell-Yan processes are also presented.

Presentation Materials