Measurements 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 correspond to an integrated luminosity of . 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 events. The experimental results are corrected for detector effects, and can be compared directly with other QCD models.

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

CANDELISE, VIERI;DELLA RICCA, GIUSEPPE;MARONE, MATTEO;MONTANINO, DAMIANA;SCHIZZI, ANDREA
2013-01-01

Abstract

Measurements 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 correspond to an integrated luminosity of . 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 events. The experimental results are corrected for detector effects, and can be compared directly with other QCD models.
2013
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http://www.sciencedirect.com/science/article/pii/S0370269313003043
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2645078
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