Rapidity distributions in exclusive Z + jet and photon + jet events in pp collisions at sqrt(s) = 7 TeV
(2013) Physical review. D, Particles and fields — Vol. D88, p. 112009 (2013)
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- 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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CMS, Basegmez, S., Bruno, G., Castello, R., Caudron, A., Ceard, L., Delaere, C., Du Pree, T., Favart, D., Forthomme, L., Hollar, J., Jez, P., Lemaitre, V., Liao, J., Militaru, O., Nuttens, C., Pagano, D., Pin, A., Piotrzkowski, K., et al. (2013). Rapidity distributions in exclusive Z + jet and photon + jet events in pp collisions at sqrt(s) = 7 TeV. Physical review. D, Particles and fields, D88, 112009. https://doi.org/10.1103/PhysRevD.88.112009 (Original work published 2013)