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Title
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First measurement of the underlying event activity at the LHC with = 0.9 TeV
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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| 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. |
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Language
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English
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Source (journal)
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European physical journal : C : particles and fields. - Berlin
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Publication
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Berlin
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2010
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ISSN
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1434-6044
1434-6052
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DOI
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10.1140/EPJC/S10052-010-1453-9
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Volume/pages
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70
:3
(2010)
, p. 555-572
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ISI
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000285200000003
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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