Title
First measurement of the underlying event activity at the LHC with <tex>$\sqrt{s}$</tex> = 0.9 TeVFirst measurement of the underlying event activity at the LHC with <tex>$\sqrt{s}$</tex> = 0.9 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Elementary Particle Physics
Publication type
article
Publication
Berlin,
Subject
Physics
Source (journal)
European physical journal : C : particles and fields. - Berlin
Volume/pages
70(2010):3, p. 555-572
ISSN
1434-6044
ISI
000285200000003
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
A measurement of the underlying activity in scattering processes with p T scale in the GeV region is performed in protonproton collisions at $\sqrt{s} = 0.9$ TeV, using data collected by the CMS experiment at the LHC. Charged particle production is studied with reference to the direction of a leading object, either a charged particle or a set of charged particles forming a jet. Predictions of several QCD-inspired models as implemented in PYTHIA are compared, after full detector simulation, to the data. The models generally predict too little production of charged particles with pseudorapidity |η|<2, p T >0.5 GeV/c, and azimuthal direction transverse to that of the leading object.
E-info
https://repository.uantwerpen.be/docman/iruaauth/1b7709/dbe5e6a5d62.pdf
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