INVESTIGADORES
MONTICELLI Fernando Gabriel
artículos
Título:
Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
PHYSICS LETTERS B
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 213 p. 1 - 23
ISSN:
0370-2693
Resumen:
: A measurement of the production cross-section for top
quark pairs (t tbar) in pp collisions at sqrt{s} = 7 TeV is presented
using data recorded with the ATLAS detector at the Large Hadron
Collider. Events are selected in the single lepton topology by requiring
an electron or muon, large missing transverse momentum and at least
three jets. With a data sample of 35/pb, two different multivariate
methods, one of which uses b-quark jet identification while the other
does not, use kinematic variables to obtain cross-section measurements
of sigma (t tbar) = 187 +/- 11 (stat.) +18-17 (syst.) +/- 6 (lumi.) pb
and sigma (t tbar) = 173 +/- 17 (stat.) +18-16 (syst.) +/- 6 (lumi.) pb}
respectively. The two measurements are in agreement with each other and
with QCD calculations. The first measurement has a better a priori
sensitivity and constitutes the main result of this Letter.