Event Shapes and Azimuthal Correlations in $Z$ + Jets Events in $pp$ Collisions at $\sqrt{s}=7$ TeV - INSPIRE

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Event Shapes and Azimuthal Correlations in $Z$ + Jets Events in $pp$ Collisions at $\sqrt{s}=7$ TeV

CMS

Collaboration

Jan, 2013

33 pages

Published in:

Phys.Lett.B 722 (2013) 238-261

Published: May 24, 2013

e-Print:

1301.1646 [hep-ex]

DOI:

10.1016/j.physletb.2013.04.025

Report number:

CMS-EWK-11-021,
CERN-PH-EP-2013-001

Experiments:

CERN-LHC-CMS

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Abstract: (Elsevier)

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.

Note:

Replaced with published version. Added journal reference and DOI

CMS
Physics
Event shape
QCD
p p: scattering
jet: multiplicity
Z0: associated production
quantum chromodynamics: perturbation theory
higher-order: 0
higher-order: 1

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Figures(5)

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