# Measurement of the differential cross section for top quark pair production in pp collisions at $\sqrt{s}$ = 8 TeV

CMS Collaboration; Khachatryan, V; Sirunyan, A M; Tumasyan, A; Aarrestad, T K; Amsler, C; Canelli, F; Chiochia, V; De Cosa, A; Hinzmann, A; Hreus, T; Kilminster, B; Lange, C; Millan Mejias, M; Ngadiuba, J; Pinna, D; Robmann, P; Ronga, F J; Taroni, S; Verzetti, M; Yang, Y; et al (2015). Measurement of the differential cross section for top quark pair production in pp collisions at $\sqrt{s}$ = 8 TeV. European Physical Journal C - Particles and Fields, 75:542.

## Abstract

The normalized differential cross section for top quark pair ($t\bar{t}$) production is measured in pp collisions at a centre-of-mass energy of 8 TeV at the CERN LHC using the CMS detector in data corresponding to an integrated luminosity of 19.7 $fb^{−1}$. The measurements are performed in the lepton+jets ($e/\mu$ +jets) and in the dilepton ($e^{+}e^{−}, \mu+\mu−$, and $e^{\pm}\mu^{\pm}$) decay channels. The $t\bar{t}$ cross section is measured as a function of the kinematic properties of the charged leptons, the jets associated to b quarks, the top quarks, and the $t\bar{t}$ system. The data are compared with several predictions from perturbative quantum chromodynamic up to approximate next-to-next-to-leading-order precision. No significant deviations are observed relative to the standard model predictions.

## Abstract

The normalized differential cross section for top quark pair ($t\bar{t}$) production is measured in pp collisions at a centre-of-mass energy of 8 TeV at the CERN LHC using the CMS detector in data corresponding to an integrated luminosity of 19.7 $fb^{−1}$. The measurements are performed in the lepton+jets ($e/\mu$ +jets) and in the dilepton ($e^{+}e^{−}, \mu+\mu−$, and $e^{\pm}\mu^{\pm}$) decay channels. The $t\bar{t}$ cross section is measured as a function of the kinematic properties of the charged leptons, the jets associated to b quarks, the top quarks, and the $t\bar{t}$ system. The data are compared with several predictions from perturbative quantum chromodynamic up to approximate next-to-next-to-leading-order precision. No significant deviations are observed relative to the standard model predictions.

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## Additional indexing

Item Type: Journal Article, refereed, original work 07 Faculty of Science > Physics Institute 530 Physics English 19 February 2015 18 Feb 2016 13:48 05 Apr 2016 20:09 Springer 1434-6044 Publisher DOI. An embargo period may apply. https://doi.org/10.1140/epjc/s10052-015-3709-x arXiv:1505.04480v2

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