Rapidity distributions in exclusive Z+ jet and photon+ jet events in pp collisions at sqrt (s)= 7 TeV
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| Dergi Adı | arXiv preprint arXiv:1310.3082 | ||
| Makale Dili | – | Basım Tarihi | 10-2013 |
| Makale Linki | https://arxiv.org/abs/1310.3082 | ||
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| Özet |
| 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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