Measurement of the underlying event in the Drell–Yan process in proton–proton collisions at √s = 7 TeV
Name
Measurement of the underlying.pdf
Size
1.46 MB
Format
Adobe PDF
Checksum (MD5)
b2c8aa0a13cd5b904c4d31f233d7700d
Author(s)
Alver, Burak Han
Bauer, Gerry P
Bendavid, Joshua L.
Busza, Wit
Cali, Ivan Amos
Dutta, Valentina
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Hahn, Kristian Allan
Klute, Markus
Date Issued
September 2012
Journal
The European Physical Journal C
Publisher
Springer-Verlag
Citation
The CMS Collaboration et al. “Measurement of the Underlying Event in the Drell–Yan Process in Proton–proton Collisions at √s = 7 TeV.” The European Physical Journal C 72.9 (2012): n. pag. © 2012 CERN for the benefit of the CMS collaboration
Version
Final published version
Abstract
A measurement of the underlying event (UE) activity in proton–proton collisions at a center-of-mass energy of 7 TeV is performed using Drell–Yan events in a data sample corresponding to an integrated luminosity of 2.2 fb[superscript −1], collected by the CMS experiment at the LHC. The activity measured in the muonic final state (qq → μ[superscript +]μ[superscript −]) is corrected to the particle level and compared with the predictions of various Monte Carlo generators and hadronization models. The dependence of the UE activity on the dimuon invariant mass is well described by PYTHIA and HERWIG++ tunes derived from the leading jet/track approach, illustrating the universality of the UE activity. The UE activity is observed to be independent of the dimuon invariant mass in
the region above 40 GeV/c[superscript 2], while a slow increase is observed with increasing transverse momentum of the dimuon system. The dependence of the UE activity on the transverse momentum of the dimuon system is accurately described by MADGRAPH, which simulates multiple hard emissions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 4.0 International License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1140/epjc/s10052-012-2080-4
