A measurement of the ratio of the W and Z cross sections with exactly one associated jet in pp collisions at sqrt(s) = 7 TeV with ATLAS

The ATLAS collaboration
Phys.Lett.B 708 (2012) 221-240, 2012.

Abstract (data abstract)
CERN-LHC. Measurement of the ratio of the production cross sections of W and Z bosons having exactly one associated jet as a function of the jet transverse momentum threshold. The data sample used has an integrated luminosity of 33 pb-1. Data are shown for the individual decay channels of the bosons in their respective fiducial regions as well as combined and corrected to full phase space. Note that the data are given as a function of the jet tranverse momentum threshold in open-ended inclusive bins, i.e. the first bin contains all events with jets > 30GeV (and so includes the data that went into the measurement in the 40 GeV bin, etc.).

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