UNIGE document Scientific Article
previous document  unige:40824  next document
add to browser collection

Measurement of the top quark pair production cross section in pp collisions at √s=7 TeV in dilepton final states with ATLAS

CollaborationWith : Abdelalim Aly, Ahmed Aly / Alexandre, Gauthier / Backes, Moritz / Barone, Gaetano / Bell, Paul / Bell, William / Berglund, Frida Elina / Blondel, Alain / Bucci, Francesca / Clark, Allan Geoffrey / Dao, Valerio / Ferrere, Didier / Gadomski, Szymon / Garcia Navarro, Jose Enrique / Gaumer, Olivier / Gonzalez Sevilla, Sergio / Goulette, Marc / Hamilton, Andrew / Iacobucci, Giuseppe / Leger, Annie / Lister, Alison / Martin Dit Latour, Bertrand / Mora Herrera, Maria Clemencia Rosario / Nektarijevic, Snezana / Nikolics, Katalin / Pasztor, Arpad / Pohl, Martin / Robichaud-Veronneau, Andrée / Rosbach, Kilian / Rosselet, Laurent / Wu, Xin
Published in Physics Letters. B. 2012, vol. 707, no. 5, p. 459-477
Abstract 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.
Keywords Top physicsHeavy quark productionTotal cross section
Full text
(ISO format)
ATLAS COLLABORATION. Measurement of the top quark pair production cross section in pp collisions at √s=7 TeV in dilepton final states with ATLAS. In: Physics Letters. B, 2012, vol. 707, n° 5, p. 459-477. doi: 10.1016/j.physletb.2011.12.055 https://archive-ouverte.unige.ch/unige:40824

422 hits



Deposited on : 2014-10-10

Export document
Format :
Citation style :