The first measurement of the cross section for top-quark pair production in pp collisions at the Large Hadron Collider at center-of-mass energy root s = 7 TeV has been performed using a data sample corresponding to an integrated luminosity of 3.1 +/- 0.3 pb(-1) recorded by the CMS detector. This result utilizes the final state with two isolated, highly energetic charged leptons, large missing transverse energy, and two or more jets. Backgrounds from Drell-Yan and non-W/Z boson production are estimated from data. Eleven events are observed in the data with 2.1 +/- 1.0 events expected from background. The measured cross section is 194 +/- 72(stat.) +/- 24(syst.) +/- 21(lumi.) pb, consistent with next-to-leading order predictions. (C) 2010 CERN. Published by Elsevier B.V. All rights reserved.
Benaglia, A., Cerati, G., DE GUIO, F., DI MATTEO, L., Ghezzi, A., Govoni, P., et al. (2011). First measurement of the cross section for top-quark pair production in proton-proton collisions at root s=7 TeV. PHYSICS LETTERS. SECTION B, 695(5), 424-443 [10.1016/j.physletb.2010.11.058].
First measurement of the cross section for top-quark pair production in proton-proton collisions at root s=7 TeV
BENAGLIA, ANDREA DAVIDEPrimo
;CERATI, GIUSEPPE BENEDETTOSecondo
;DE GUIO, FEDERICO;DI MATTEO, LEONARDO;GHEZZI, ALESSIO;GOVONI, PIETRO;MALBERTI, MARTINA;MARTELLI, ARABELLA;MASSIRONI, ANDREA;MORONI, LUIGI;PAGANONI, MARCO;RAGAZZI, STEFANO;TABARELLI DE FATIS, TOMMASOPenultimo
;TANCINI, VALENTINAUltimo
2011
Abstract
The first measurement of the cross section for top-quark pair production in pp collisions at the Large Hadron Collider at center-of-mass energy root s = 7 TeV has been performed using a data sample corresponding to an integrated luminosity of 3.1 +/- 0.3 pb(-1) recorded by the CMS detector. This result utilizes the final state with two isolated, highly energetic charged leptons, large missing transverse energy, and two or more jets. Backgrounds from Drell-Yan and non-W/Z boson production are estimated from data. Eleven events are observed in the data with 2.1 +/- 1.0 events expected from background. The measured cross section is 194 +/- 72(stat.) +/- 24(syst.) +/- 21(lumi.) pb, consistent with next-to-leading order predictions. (C) 2010 CERN. Published by Elsevier B.V. All rights reserved.
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