Journal
PHYSICS LETTERS B
Volume 693, Issue 5, Pages 515-521Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2010.09.011
Keywords
Top quark; Differential cross sections; Perturbative QCD
Funding
- DOE (USA)
- NSF (USA)
- CEA (France)
- CNRS/IN2P3 (France)
- FASI (Russia)
- Rosatom (Russia)
- RFBR (Russia)
- CNPq (Brazil)
- FAPERJ (Brazil)
- FAPESP (Brazil)
- FUNDUNESP (Brazil)
- DAE (India)
- DST (India)
- Colciencias (Colombia)
- CONACyT (Mexico)
- KRF (Korea)
- KOSEF (Korea)
- CONICET (Argentina)
- UBACyT (Argentina)
- FOM (The Netherlands)
- STFC (United Kingdom)
- Royal Society (United Kingdom)
- MSMT (Czech Republic)
- GACR (Czech Republic)
- CRC (Canada)
- CFI (Canada)
- NSERC (Canada)
- West Grid Project (Canada)
- BMBF (Germany)
- DFG (Germany)
- SFI (Ireland)
- Swedish Research Council (Sweden)
- CAS (China)
- CNSF (China)
- Science and Technology Facilities Council [PP/F000863/1, PP/D004284/1, ST/H000992/1, ST/F00754X/1, ST/I505756/1, ST/F007418/1, ST/H00095X/1, PP/E000487/1, ST/H00095X/2, ST/H001166/1, ST/H004068/1] Funding Source: researchfish
- STFC [PP/E000487/1, ST/F00754X/1, ST/H000992/1, ST/H001166/1, ST/F007418/1, ST/H00095X/1, ST/H00095X/2, PP/F000863/1, ST/I505756/1, ST/H004068/1] Funding Source: UKRI
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We present a measurement of the differential cross section for t (t) over bar events produced in p (p) over bar collisions at root 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 (l), a large imbalance in p(T). four or more jets with at least one candidate for a b jet, and correspond to 1 fb(-1) of integrated luminosity recorded with the D0 detector. Objects in the event are associated through a constrained kinematic fit to the t (t) over bar -> WbW (b) over bar -> lvbq (q) over bar' (b) over bar process. Results from next and next-to-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. (C) 2010 Elsevier B.V. All rights reserved.
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