Abstract
We present a measurement of the differential cross section for tt events produced in pp collisions at √s=1.96 TeV as a function of the transverse momentum (pT) of the top quark. The selected events contain a high-pT lepton (γ), a large imbalance in pT, 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 tt → WbWb → γνbqq'b 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.
Original language | English |
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Pages (from-to) | 515-521 |
Number of pages | 7 |
Journal | Physics Letters B |
Volume | 693 |
Issue number | 5 |
DOIs | |
State | Published - Oct 18 2010 |
Externally published | Yes |
Funding
We thank the staffs at Fermilab and collaborating institutions, and acknowledge support from the DOE and NSF (USA); CEA and CNRS/IN2P3 (France); FASI , Rosatom and RFBR (Russia); CNPq , FAPERJ , FAPESP and FUNDUNESP (Brazil); DAE and DST (India); Colciencias (Colombia); CONACyT (Mexico); KRF and KOSEF (Korea); CONICET and UBACyT (Argentina); FOM (The Netherlands); STFC and the Royal Society (United Kingdom); MSMT and GACR (Czech Republic); CRC Program , CFI , NSERC and WestGrid Project (Canada); BMBF and DFG (Germany); SFI (Ireland); The Swedish Research Council (Sweden); and CAS and CNSF (China).
Funders | Funder number |
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MSMT | |
National Science Foundation | |
U.S. Department of Energy | |
CRC Health Group | |
Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS) | |
California Earthquake Authority | |
Kortney Rose Foundation | |
Natural Sciences and Engineering Research Council of Canada | |
Canada Foundation for Innovation | |
Science and Technology Facilities Council | ST/H004068/1, PP/F000863/1, ST/H000992/1, PP/E000487/1, ST/H001166/1, ST/I505756/1, ST/F007418/1, ST/F00754X/1, ST/H00095X/2, ST/H00095X/1 |
Royal Society | |
Department of Science and Technology, Ministry of Science and Technology, India | |
Department of Atomic Energy, Government of India | |
Science Foundation Ireland | |
Deutsche Forschungsgemeinschaft | |
Stichting voor Fundamenteel Onderzoek der Materie | |
Fundação de Amparo à Pesquisa do Estado de São Paulo | |
National Natural Science Foundation of China | |
Grantová Agentura České Republiky | |
Russian Foundation for Basic Research | |
Bundesministerium für Bildung und Forschung | |
Chinese Academy of Sciences | |
Consejo Nacional de Investigaciones Científicas y Técnicas | |
Consejo Nacional de Ciencia y Tecnología | |
Conselho Nacional de Desenvolvimento Científico e Tecnológico | |
Korea Science and Engineering Foundation | |
Vetenskapsrådet | |
Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro | |
Centre National de la Recherche Scientifique | |
Federal Agency for Science and Innovation | |
State Atomic Energy Corporation ROSATOM | |
Fundação para o Desenvolvimento da UNESP | |
Secretaría de Ciencia y Técnica, Universidad de Buenos Aires | |
Institut National de Physique Nucléaire et de Physique des Particules |
Keywords
- Differential cross sections
- Perturbative QCD
- Top quark