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Dependence on pseudorapidity and on centrality of charged hadron production in PbPb collisions at root s(NN)=2.76 TeV

AutorChatrchyan, S.; Brochero Cifuentes, J. A. CSIC ORCID; Cabrillo, I. J. CSIC ORCID ; Calderon, Alicia ; Chuang, S. H. CSIC; Duarte Campderros, J. CSIC ORCID ; Felcini, Marta CSIC ORCID; Fernández-García, Marcos CSIC ORCID ; Gómez, Gervasio CSIC ORCID ; González Sánchez, J. CSIC ; Jorda, C. CSIC; Lobelle Pardo, P. CSIC; López Virto, A. CSIC ORCID ; Marco, Jesús CSIC ORCID ; Marco, Rafael CSIC; Martínez-Rivero, Celso CSIC ORCID ; Matorras, Francisco CSIC ORCID ; Muñoz Sánchez, F. J. CSIC ORCID; Piedra, Jonatan CSIC ORCID ; Rodrigo, Teresa CSIC ORCID ; Rodríguez Marrero, Ana Y. CSIC; Ruiz Jimeno, Alberto CSIC ORCID ; Scodellaro, Luca CSIC ORCID ; Sobron Sañudo, M. CSIC; Vila, Iván CSIC ORCID; Vilar Cortabitarte, R. CSIC ORCID; CMS Collaboration
Fecha de publicación2011
EditorSpringer Nature
CitaciónJournal of High Energy Physics 8: 141 (2011)
ResumenA measurement is presented of the charged hadron multiplicity in hadronic PbPb collisions, as a function of pseudorapidity and centrality, at a collision energy of 2.76 TeV per nucleon pair. The data sample is collected using the CMS detector and a minimum-bias trigger, with the CMS solenoid off. The number of charged hadrons is measured both by counting the number of reconstructed particle hits and by forming hit doublets of pairs of layers in the pixel detector. The two methods give consistent results. The charged hadron multiplicity density, dN ch /dη| η=0, for head-on collisions is found to be 1612 ± 55, where the uncertainty is dominated by systematic effects. Comparisons of these results to previous measurements and to various models are also presented.
URIhttp://hdl.handle.net/10261/51918
DOI10.1007/JHEP08(2011)141Open Access
Identificadoresdoi: 10.1007/JHEP08(2011)141Open Access
e-issn: 1126-6708
Aparece en las colecciones: (IFCA) Artículos




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