/ Experiment-HEP arXiv:1001.1900

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

Published in: Phys.Lett.
Year: 2010
Vol.: B693
Page No: 515-521
Pages: 7

Abstract: 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.

Keyword(s): Top quark ; Differential cross sections ; Perturbative QCD

Total numbers of views: 1619
Numbers of unique views: 707
e-proceeding
Запись создана 2010-10-29, последняя модификация 2014-01-30

Внешние ссылки:
FERMILABPUB
DURHAM
Оценить этот документ:

1
2
3

(Еще не рецензированная)