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Rapidity distributions in exclusive Z + jet and photon + jet events in pp collisions at sqrt(s)=7 TeV

Abstract : Rapidity distributions are presented for events containing either a Z boson or a photon with a single jet in proton-proton collisions produced at the CERN LHC. The data, collected with the CMS detector at sqrt(s) = 7 TeV, correspond to an integrated luminosity of 5.0 inverse femtobarns. The individual rapidity distributions of the boson and the jet are consistent within 5% with expectations from perturbative QCD. However, QCD predictions for the sum and the difference in rapidities of the two final-state objects show discrepancies with CMS data. In particular, next-to-leading-order QCD calculations, and two common Monte Carlo event generators using different methods to match matrix-element partons with parton showers, appear inconsistent with the data as well as with each other.
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http://hal.in2p3.fr/in2p3-00872711
Contributor : Sylvie Flores <>
Submitted on : Monday, October 14, 2013 - 12:10:21 PM
Last modification on : Thursday, June 17, 2021 - 3:18:53 PM

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S. Chatrchyan, M. Besançon, F. Couderc, M. Dejardin, D. Denegri, et al.. Rapidity distributions in exclusive Z + jet and photon + jet events in pp collisions at sqrt(s)=7 TeV. Physical Review D, American Physical Society, 2013, 88, pp.112009. ⟨10.1103/PhysRevD.88.112009⟩. ⟨in2p3-00872711⟩

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