First measurement of the underlying event activity at the LHC with √s = 0.9 TeV

A measurement of the underlying activity in scattering processes with p sub(T )scale in the GeV region is performed in proton-proton collisions at 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, e...

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Veröffentlicht in:	The European physical journal. C, Particles and fields Particles and fields, 2010-12, Vol.70 (3), p.555-572
Hauptverfasser:	Sirunyan, A M, Tumasyan, A, Adam, W, Bergauer, T, Dragicevic, M, Eroe, J, Fabjan, C, Friedl, M, Fruehwirth, R, Ghete, V M
Format:	Artikel
Sprache:	eng
Schlagworte:	Charged particles Collisions Computer simulation Detectors Exact sciences and technology Forming Mathematical models Physics Scattering The physics of elementary particles and fields
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description	A measurement of the underlying activity in scattering processes with p sub(T )scale in the GeV region is performed in proton-proton collisions at 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
doi_str_mv	10.1140/epjc/s10052-010-1453-9
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subjects	Charged particles Collisions Computer simulation Detectors Exact sciences and technology Forming Mathematical models Physics Scattering The physics of elementary particles and fields
title	First measurement of the underlying event activity at the LHC with √s = 0.9 TeV
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