Dependence of the $t\bar{t}$ production cross section on the transverse momentum of the top quark

D0 Collaboration, The and Abazov, V. and Bertram, Iain and Borissov, Guennadi and Fox, Harald and Williams, Mark and Ratoff, Peter and Love, Peter and Sopczak, Andre (2010) Dependence of the $t\bar{t}$ production cross section on the transverse momentum of the top quark. Physics Letters B, 693 (15). pp. 515-521.

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We present a measurement of the differential cross section for $t\bar{t}$ events produced in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV as a function of the transverse momentum ($p_T$) of the top quark. The selected events contain a high-$p_T$ lepton ($\ell$), four or more jets, and a large imbalance in $p_T$, and correspond to 1 fb${}^{-1}$ of integrated luminosity recorded with the D0 detector. Each event must have at least one candidate for a $b$ jet. Objects in the event are associated through a constrained kinematic fit to the $t\bar{t}\to WbW\bar{b} \to \ell\nu b q\bar{q}'\bar{b}$ process. Results from next-to-leading-order perturbative QCD calculations agree with the measured differential cross section. Comparisons are also provided to predictions from Monte Carlo event generators using QCD calculations at different levels of precision.

Item Type: Journal Article
Journal or Publication Title: Physics Letters B
Additional Information: 8 pages, 6 figures, 4 tables, updated to reflect the published version
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3106
Departments: Faculty of Science and Technology > Physics
ID Code: 63703
Deposited By: ep_importer_pure
Deposited On: 25 Apr 2013 10:13
Refereed?: Yes
Published?: Published
Last Modified: 07 Jan 2020 03:49

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