CMS Collaboration, Adair, A., Akgun, B., et al.. "Probing color coherence effects in pp collisions at √s = 7TeV." The European Physica Journal C, 74, (2014) 2901. http://dx.doi.org/10.1140/epjc/s10052-014-2901-8.
A study of color coherence effects in pp collisions at a center-of-mass energy of 7 TeV is presented. The data used in the analysis were collected in 2010 with the CMS detector at the LHC and correspond to an integrated luminosity of 36 pb−1. Events are selected that contain at least three jets and where the two jets with the largest transverse momentum exhibit a back-to-back topology. The measured angular correlation between the second- and third-leading jet is shown to be sensitive to color coherence effects, and is compared to the predictions of Monte Carlo models with various implementations of color coherence. None of the models describe the data satisfactorily.
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