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Event shapes and azimuthal correlations in Z + jets events in pp collisions at √s=7 TeV

AutorChatrchyan, S.; Brochero Cifuentes, J. A. ; Cabrillo, I. J. ; Calderon, Alicia ; Chuang, S. H. ; Duarte Campderros, J. ; Felcini, Marta ; Fernández, M. ; Gómez, G. ; González Sánchez, J. ; Graziano, A. ; Jorda, C. ; López Virto, A. ; Marco, Jesús ; Marco, Rafael ; Martínez-Rivero, Celso ; Matorras, Francisco ; Muñoz Sánchez, F. J. ; Rodrigo, Teresa ; Rodríguez Marrero, Ana Y. ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío ; CMS Collaboration
Fecha de publicación2013
EditorElsevier
CitaciónPhysics Letters B 722: 238-261 (2013)
ResumenMeasurements of event shapes and azimuthal correlations are presented for events where a Z boson is produced in association with jets in proton–proton collisions. The data collected with the CMS detector at the CERN LHC at √s = 7 TeV correspond to an integrated luminosity of 5.0 fb−1. The analysis provides a test of predictions from perturbative QCD for a process that represents a substantial background to many physics channels. Results are presented as a function of jet multiplicity, for inclusive Z boson production and for Z bosons with transverse momenta greater than 150 GeV, and compared to predictions from Monte Carlo event generators that include leading-order multiparton matrix-element (with up to four hard partons in the final state) and next-to-leading-order simulations of Z+1-jet events. The experimental results are corrected for detector effects, and can be compared directly with other QCD models.
Versión del editorhttp://dx.doi.org/10.1016/j.physletb.2013.04.025
URIhttp://hdl.handle.net/10261/109312
DOI10.1016/j.physletb.2013.04.025
Identificadoresdoi: 10.1016/j.physletb.2013.04.025
issn: 0370-2693
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