INVESTIGADORES
MONTICELLI Fernando Gabriel
artículos
Título:
Measurement of the top quark pair production cross section in pp collisions at √s = 7 TeV in dilepton final states with ATLAS
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
PHYSICS LETTERS B
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 231 p. 1 - 23
ISSN:
0370-2693
Resumen:
A measurement of the production cross section of top quark pairs (ttbar)
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 ttbar
production cross section of 171 +/- 20(stat.) +/- 14(syst.) +8-6(lum.)
pb is measured for an assumed top quark mass of 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.