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

Authors:Khachatryan, V.
Cabrillo, I. J.
Calderón, A.
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
E-ISSNmetadata.dc.identifier.doi = DOI:1434-6052
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Appears in Collections:(IFCA) Artículos

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