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

Barton, Adam Edward and Beattie, Michael and Bertram, Iain Alexander and Borissov, Guennadi and Bouhova-Thacker, Evelina Vassileva and Cheatham, Sue and Dearnaley, William and Fox, Harald and Grimm, Kathryn Ann Tschann and Henderson, Robert Charles William and Hughes, Gareth and Jones, Roger William Lewis and Kartvelishvili, Vakhtang and Long, Robin Eamonn and Love, Peter Allan and Muenstermann, Daniel Matthias Alfred and Parker, Adam Jackson and Skinner, Malcolm and Smizanska, Maria and Walder, James William and Wharton, Andy (2016) Measurement of top quark pair differential cross sections in the dilepton channel in pp collisions at √s=7 and 8 TeV with ATLAS. Physical Review D, 94 (9). ISSN 1550-7998

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Abstract

Measurements of normalized differential cross sections of top quark pair (tt¯) production are presented as a function of the mass, the transverse momentum and the rapidity of the tt¯ 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 tt¯ production. The results are consistent with the majority of predictions in a wide kinematic range.

Item Type: Journal Article
Journal or Publication Title: Physical Review D
Departments: Faculty of Science and Technology > Physics
ID Code: 83481
Deposited By: ep_importer_pure
Deposited On: 06 Dec 2016 09:28
Refereed?: Yes
Published?: Published
Last Modified: 15 Oct 2019 04:03
URI: https://eprints.lancs.ac.uk/id/eprint/83481

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