19-22 October 2011
Hotel Roanoke, Roanoke VA
US/Eastern timezone
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Angular Distribution of Z0 Bosons in Z0+Jet Events

22 Oct 2011, 08:54
Crystal Ballroom B (Hotel Roanoke, Roanoke VA)

Crystal Ballroom B

Hotel Roanoke, Roanoke VA


Luis Lebolo (Florida International University)


The Z0 boson center-of-mass angular distribution is measured in proton-proton collisions at sqrt{s} = 7~TeV, at the CERN LHC. The advantage of studying the angular distribution is that the partonic cross section is solely a function of s-hat and cos(theta-hat); it does not depend on the details of the parton distribution functions. The data sample, recorded with the CMS detector, corresponds to an integrated luminosity of approximately 36 pb^{-1}. Events in which there is a Z0 and at least one jet, with a transverse momentum threshold of 20 GeV and absolute rapidity less than 2.5, are selected for this analysis. Only the Z0's muon decay channel is studied. Within experimental and theoretical uncertainties, the measured angular distribution is in agreement with next-to-leading order perturbative QCD predictions. This analysis extends the phase space available to previous Tevatron studies by probing larger values of s-hat and center-of-mass rapidities.

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