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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/46051
Title: First measurement of the underlying event activity at the LHC with √s = 0.9 TeV
Authors: Khachatryan, V.; Cabrillo, I. J.; Calderón-Urrea, Alejandro; Chuang, S. H.; Diaz Merino, I.; Diez González, C.; Duarte Campderros, J.; Fernández, M.; Gómez, G.; González Suárez, R.; González Sánchez, J.; Jorda, C.; Lobelle Pardo, P.; López Virto, A.; Marco, Jesús; Marco, Rafael; Martínez-Rivero, Celso; Matorras, Francisco; Martínez Ruiz del Arbol, P.; Rodrigo, Teresa; Ruiz Jimeno, Alberto; Scodellaro, Luca; Sobron Sañudo, M.; Vila, Iván; Vilar, Rocío
Issue Date: Dec-2010
Publisher: Springer
Citation: European Physical Journal C: Particles and Fields 70(3): 555-572 (2010)
Abstract: A measurement of the underlying activity in scattering processes with pT scale in the GeV region is performed in proton–proton collisions at √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 QCDinspired 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, pT > 0.5 GeV/c, and azimuthal direction transverse to that of the leading object.
Description: 18 páginas, 5 figuras, 3 tablas.-- Open Access: This article is distributed under the terms of the Creative Commons Attribution Noncommercial License.-- CMS Collaboration: et al.
Publisher version (URL): http://dx.doi.org/10.1140/epjc/s10052-010-1453-9Open Access
URI: http://hdl.handle.net/10261/46051
ISSN: 1434-6044
DOI: 10.1140/epjc/s10052-010-1453-9
E-ISSN: 1434-6052
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