The tt production cross section and top quark mass are measured in protonproton collisions at √s = 7 TeV in a data sample corresponding to an integrated luminosity of 36 pb-1 collected by the CMS experiment. The measurements are performed in events with two leptons (electrons or muons) in the final state. Results of the cross section measurement in events with and without b-quark identi cation are obtained and combined. The measured value is σtt = 168 ± 18 (stat:) ± 14 (syst:) ± 7 (lumi:) pb, consistent with predictions from the standard model. The top quark mass mtop is reconstructed with two di erent methods, a full kinematic analysis and a matrix weighting technique. The combination yields a measurement of mtop = 175:5 ± 4:6 (stat:) ± 4:6 (syst:) GeV/c2. © SISSA 2011.

Chatrchyan, S., Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Bergauer, T., et al. (2011). Measurement of the tt production cross section and the top quark mass in the dilepton channel in pp collisions at √s = 7 TeV: The CMS collaboration. JOURNAL OF HIGH ENERGY PHYSICS, 2011(7) [10.1007/JHEP07(2011)049].

Measurement of the tt production cross section and the top quark mass in the dilepton channel in pp collisions at √s = 7 TeV: The CMS collaboration

BENAGLIA, ANDREA DAVIDE;DE GUIO, FEDERICO;DI MATTEO, LEONARDO;GHEZZI, ALESSIO;MARTELLI, ARABELLA;MASSIRONI, ANDREA;MORONI, LUIGI;PAGANONI, MARCO;RAGAZZI, STEFANO;TABARELLI DE FATIS, TOMMASO;Branca, A;Govoni, P;DINARDO, MAURO EMANUELE;
2011

Abstract

The tt production cross section and top quark mass are measured in protonproton collisions at √s = 7 TeV in a data sample corresponding to an integrated luminosity of 36 pb-1 collected by the CMS experiment. The measurements are performed in events with two leptons (electrons or muons) in the final state. Results of the cross section measurement in events with and without b-quark identi cation are obtained and combined. The measured value is σtt = 168 ± 18 (stat:) ± 14 (syst:) ± 7 (lumi:) pb, consistent with predictions from the standard model. The top quark mass mtop is reconstructed with two di erent methods, a full kinematic analysis and a matrix weighting technique. The combination yields a measurement of mtop = 175:5 ± 4:6 (stat:) ± 4:6 (syst:) GeV/c2. © SISSA 2011.
Articolo in rivista - Articolo scientifico
Hadron-Hadron Scattering; Nuclear and High Energy Physics
English
2011
2011
7
49
none
Chatrchyan, S., Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Bergauer, T., et al. (2011). Measurement of the tt production cross section and the top quark mass in the dilepton channel in pp collisions at √s = 7 TeV: The CMS collaboration. JOURNAL OF HIGH ENERGY PHYSICS, 2011(7) [10.1007/JHEP07(2011)049].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/71586
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