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Título

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

AutorKhachatryan, V.; Cabrillo, I. J. ; Calderon, Alicia; Chuang, S. H. ; Diaz Merino, I.; Díez 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
Fecha de publicacióndic-2010
EditorSpringer
CitaciónEuropean Physical Journal C: Particles and Fields 70(3): 555-572 (2010)
ResumenA 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.
Descripción18 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.
Versión del editorhttp://dx.doi.org/10.1140/epjc/s10052-010-1453-9Open Access
URIhttp://hdl.handle.net/10261/46051
DOI10.1140/epjc/s10052-010-1453-9
ISSN1434-6044
E-ISSN1434-6052
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