@article{3157027, title = "Measurement of differential top-quark-pair production cross sections in pp collisions at root s=7 TeV", author = "Chatrchyan, S. and Khachatryan, V. and Sirunyan, A. M. and Tumasyan, A. and and Adam, W. and Aguilo, E. and Bergauer, T. and Dragicevic, M. and and Eroe, J. and Fabjan, C. and Friedl, M. and Fruehwirth, R. and Ghete, V. and M. and Hammer, J. and Hoermann, N. and Hrubec, J. and Jeitler, M. and and Kiesenhofer, W. and Knuenz, V. and Krammer, M. and Kraetschmer, I. and and Liko, D. and Mikulec, I. and Pernicka, M. and Rahbaran, B. and and Rohringer, C. and Rohringer, H. and Schoefbeck, R. and Strauss, J. and and Taurok, A. and Waltenberger, W. and Walzel, G. and Widl, E. and Wulz, and C-E. and Mossolov, V. and Shumeiko, N. and Gonzalez, J. Suarez and and Bansal, M. and Bansal, S. and Cornelis, T. and De Wolf, E. 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H. and Swanson, J. and CMS Collaboration", journal = "The European Physical Journal C - Particles and Fields", year = "2013", volume = "73", number = "3", publisher = "Springer-Verlag", issn = "1434-6044, 1434-6052", doi = "10.1140/epjc/s10052-013-2339-4", abstract = "Normalised differential top-quark-pair production cross sections are measured in pp collisions at a centre-of-mass energy of 7 TeV at the LHC with the CMS detector using data recorded in 2011 corresponding to an integrated luminosity of 5.0 fb(-1). The measurements are performed in the lepton + jets decay channels (e + jets and mu + jets) and the dilepton decay channels (e(+)e(-), mu(+)mu(-), and mu(+/-)e(-/+)). The t (t) over bar differential cross section is measured as a function of kinematic properties of the final-state charged leptons and jets associated to b quarks, as well as those of the top quarks and the t (t) over bar system. The data are compared with several predictions from perturbative QCD calculations up to approximate next-to-next-to-leading-order precision. No significant deviations from the standard model are observed." }