Measurement of the top quark pair production cross section in pp collisions at √(s)=7 TeV in dilepton final states with ATLAS
Creators
- 1. Fakultät für Mathematik und Physik, Albert-Ludwigs-Universität, Freiburg i.Br. (Germany)
- 2. Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK (United States)
- 3. Institut de Física d'Altes Energies and Universitat Autònoma de Barcelona and ICREA, Barcelona (Spain)
- 4. Section de Physique, Université de Genève, Geneva (Switzerland)
- 5. Department of Physics, Oxford University, Oxford (United Kingdom)
- 6. Institute of Physics, Azerbaijan Academy of Sciences, Baku (Azerbaijan)
- 7. Department of Physics, Oklahoma State University, Stillwater, OK (United States)
- 8. Department of Physics and Astronomy, Michigan State University, East Lansing, MI (United States)
- 9. Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv (Israel)
- 10. LAL, Univ. Paris-Sud and CNRS/IN2P3, Orsay (France)
- 11. Dipartimento di Fisica, Università di Milano, Milano (Italy)
- 12. INFN Sezione di Milano (Italy)
- 13. ICTP, Trieste (Italy)
- 14. INFN Gruppo Collegato di Udine (Italy)
- 15. Physics Department, Brookhaven National Laboratory, Upton, NY (United States)
- 16. Department of Physics, Hampton University, Hampton, VA (United States)
- 17. Department of Physics, Yale University, New Haven, CT (United States)
- 18. Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), München (Germany)
Description
A measurement of the production cross section of top quark pairs (tt¯) in proton-proton collisions at a center-of-mass energy of 7 TeV recorded with the ATLAS detector at the Large Hadron Collider is reported. Candidate events are selected in the dilepton topology with large missing transverse energy and at least two jets. Using a data sample corresponding to an integrated luminosity of 35 pb-1, a tt¯ production cross section σtt¯=177±20(stat.)±14(syst.)±7(lum.) pb is measured for an assumed top quark mass of mt=172.5 GeV. A second measurement requiring at least one jet identified as coming from a b quark yields a comparable result, demonstrating that the dilepton final states are consistent with being accompanied by b-quark jets. These measurements are in good agreement with Standard Model predictions.
Availability note (English)
Available from http://dx.doi.org/10.1016/j.physletb.2011.12.055Additional details
Identifiers
- DOI
- 10.1016/j.physletb.2011.12.055;
- arXiv
- arXiv:1108.3699v2;
- PII
- S0370-2693(11)01523-1;
Publishing Information
- Journal Title
- Physics Letters. Section B
- Journal Volume
- 707
- Journal Issue
- 5
- Journal Page Range
- p. 459-477
- ISSN
- 0370-2693
- CODEN
- PYLBAJ
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Syrian Arab Republic
- INIS RN
- 43098445
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- A CENTERS; B QUARKS; C QUARKS; CERN LHC; GEV RANGE 100-1000; LUMINOSITY; MASS; PAIR PRODUCTION; PROTON-PROTON INTERACTIONS; STANDARD MODEL; T QUARKS; TEV RANGE 01-10; TOPOLOGY; TOTAL CROSS SECTIONS; TRANSVERSE ENERGY
- Descriptors DEC
- ACCELERATORS; BARYON-BARYON INTERACTIONS; BEAUTY PARTICLES; CHARM PARTICLES; COLOR CENTERS; CROSS SECTIONS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; CYCLIC ACCELERATORS; ELEMENTARY PARTICLES; ENERGY; ENERGY RANGE; FERMIONS; FIELD THEORIES; GEV RANGE; GRAND UNIFIED THEORY; HADRON-HADRON INTERACTIONS; INTERACTIONS; KINETIC ENERGY; MATHEMATICAL MODELS; MATHEMATICS; NUCLEON-NUCLEON INTERACTIONS; OPTICAL PROPERTIES; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PRODUCTION; PHYSICAL PROPERTIES; POINT DEFECTS; POSTULATED PARTICLES; PROTON-NUCLEON INTERACTIONS; QUANTUM FIELD THEORY; QUARKS; STORAGE RINGS; SYNCHROTRONS; TEV RANGE; TOP PARTICLES; UNIFIED GAUGE MODELS; VACANCIES
Optional Information
- Copyright
- Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.