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Measurement of top quark pair differential cross sections in the dilepton channel in pp collisions at √s=7 and 8 TeV with ATLAS
Journal article   Open access   Peer reviewed

Measurement of top quark pair differential cross sections in the dilepton channel in pp collisions at √s=7 and 8 TeV with ATLAS

K Hara, S. H Kim, H Okawa, K Sato, F Ukegawa and ATLAS Collaboration
Physical review D, Vol.94(9), 092003
11/01/2016
DOI: 10.1103/PhysRevD.94.092003
url
https://doi.org/10.1103/PhysRevD.94.092003View
Published (Version of record) Open Access

Abstract

Measurements of normalized differential cross sections of top quark pair (t¯t) production are presented as a function of the mass, the transverse momentum and the rapidity of the t¯t system in proton-proton collisions at center-of-mass energies of √s=7 and 8 TeV. The data set corresponds to an integrated luminosity of 4.6  fb−1 at 7 TeV and 20.2  fb−1 at 8 TeV, recorded with the ATLAS detector at the Large Hadron Collider. Events with top quark pair signatures are selected in the dilepton final state, requiring exactly two charged leptons and at least two jets with at least one of the jets identified as likely to contain a b hadron. The measured distributions are corrected for detector effects and selection efficiency to cross sections at the parton level. The differential cross sections are compared with different Monte Carlo generators and theoretical calculations of t¯t production. The results are consistent with the majority of predictions in a wide kinematic range.
High Energy Physics Experiment Nuclear Experiment Phenomenology 物理学

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