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

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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Beschreibung
Zusammenfassung: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
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-010-1453-9