Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/9697
Title: First measurement of the underlying event activity at the LHC with ?s=0.9 TeV
Authors: Khachatryan, V.
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Bergauer, T.
Dragicevic, M.
CMS Collaboration
Issue Date: 2010
Publisher: Springer Verlag
Abstract: A measurement of the underlying activity in scattering processes with p (T) scale in the GeV region is performed in proton-proton collisions at root 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 |eta|< 2, p (T) > 0.5 GeV/c, and azimuthal direction transverse to that of the leading object.
URI: https://doi.org/10.1140/epjc/s10052-010-1453-9
https://hdl.handle.net/11147/9697
ISSN: 1434-6044
1434-6052
Appears in Collections:WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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