Event generator tunes obtained from underlying event and multiparton scattering measurements
Event generator tunes obtained from underlying event and multiparton scattering measurements
New sets of parameters (“tunes”) for the underlying-event (UE) modelling of the pythia8, pythia6 and herwig++ Monte Carlo event generators are constructed using different parton distribution functions. Combined fits to CMS UE proton–proton (pp) data at s√=7TeV and to UE proton–antiproton (pp¯¯¯) data from the CDF experiment at lower s√, are used to study the UE models and constrain their parameters, providing thereby improved predictions for proton–proton collisions at 13TeV. In addition, it is investigated whether the values of the parameters obtained from fits to UE observables are consistent with the values determined from fitting observables sensitive to double-parton scattering processes. Finally, comparisons are presented of the UE tunes to “minimum bias” (MB) events, multijet, and Drell–Yan (qq¯¯¯→Z/γ∗→ lepton-antilepton+jets) observables at 7 and 8TeV, as well as predictions for MB and UE observables at 13TeV.
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
March 2016
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
(2016)
Event generator tunes obtained from underlying event and multiparton scattering measurements.
The European Physical Journal C, 76 (3), [155].
(doi:10.1140/epjc/s10052-016-3988-x).
Abstract
New sets of parameters (“tunes”) for the underlying-event (UE) modelling of the pythia8, pythia6 and herwig++ Monte Carlo event generators are constructed using different parton distribution functions. Combined fits to CMS UE proton–proton (pp) data at s√=7TeV and to UE proton–antiproton (pp¯¯¯) data from the CDF experiment at lower s√, are used to study the UE models and constrain their parameters, providing thereby improved predictions for proton–proton collisions at 13TeV. In addition, it is investigated whether the values of the parameters obtained from fits to UE observables are consistent with the values determined from fitting observables sensitive to double-parton scattering processes. Finally, comparisons are presented of the UE tunes to “minimum bias” (MB) events, multijet, and Drell–Yan (qq¯¯¯→Z/γ∗→ lepton-antilepton+jets) observables at 7 and 8TeV, as well as predictions for MB and UE observables at 13TeV.
Text
art_10.1140_epjc_s10052-016-3988-x
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Accepted/In Press date: 29 February 2016
e-pub ahead of print date: 17 March 2016
Published date: March 2016
Organisations:
Physics & Astronomy
Identifiers
Local EPrints ID: 408739
URI: http://eprints.soton.ac.uk/id/eprint/408739
ISSN: 1434-6044
PURE UUID: 562a1cd6-d639-47bb-8a35-2e5df866f3ec
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Date deposited: 27 May 2017 04:03
Last modified: 16 Mar 2024 03:54
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Contributors
Author:
Vardan Khachatryan
Corporate Author: The CMS Collaboration
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