Measurement of the rapidity and transverse momentum distributions of Z bosons in pp collisions at √(s)=7  TeV

Measurements of the normalized rapidity (y) and transverse-momentum (q T) distributions of Drell-Yan muon and electron pairs in the Z-boson mass region (60<M<120GeV) are reported. The results are obtained using a data sample of proton-proton collisions at a center-of-mass energy of 7 TeV, coll...

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Detalhes bibliográficos
Autores: Chatrchyan, S., Brochero Cifuentes, J. A., Cabrillo, I. J., Calderon, Alicia, Chuang, S. H., Duarte Campderros, J., Felcini, Marta, Fernández-García, Marcos, Gómez, Gervasio, González Sánchez, J., Jorda, C., Lobelle Pardo, P., López Virto, A., Marco, Jesús, Marco, Rafael, Martínez-Rivero, Celso, Matorras, Francisco, Muñoz Sánchez, F. J., Piedra, Jonatan, Rodrigo Anoro, Teresa, Rodríguez Marrero, Ana Y., Ruiz Jimeno, Alberto, Scodellaro, Luca, Sobron Sañudo, M., Vila, Iván, Vilar Cortabitarte, R., CMS Collaboration
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2012
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/51993
Acesso em linha:http://hdl.handle.net/10261/51993
Access Level:acceso abierto
Palavra-chave:ddc:530
Descrição
Resumo:Measurements of the normalized rapidity (y) and transverse-momentum (q T) distributions of Drell-Yan muon and electron pairs in the Z-boson mass region (60<M<120GeV) are reported. The results are obtained using a data sample of proton-proton collisions at a center-of-mass energy of 7 TeV, collected by the CMS experiment at the Large Hadron Collider (LHC), corresponding to an integrated luminosity of 36pb -1. The distributions are measured over the ranges |y|<3.5 and q T< 600GeV and compared with quantum chromodynamics (QCD) calculations using recent parton distribution functions to model the momenta of the quarks and gluons in the protons. Overall agreement is observed between the models and data for the rapidity distribution, while no single model describes the Z transverse-momentum distribution over the full range. © 2012 CERN.