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

CMS Collaboration

Research output: Contribution to journalArticle

50 Scopus citations

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 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.

Original languageEnglish (US)
Pages (from-to)238-261
Number of pages24
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume722
Issue number4-5
DOIs
StatePublished - May 24 2013
Externally publishedYes

Keywords

  • CMS
  • Event shape
  • Physics
  • QCD

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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