Measurement of the t(t)over-bar production cross section and the top quark mass in the dilepton channel in pp collisions at root s=7 Tev

Open access
Author
CMS Collaboration
Chatrchyan, Serguei
Bäni, Lukas
Bortignon, Pierluigi
Caminada, Lea
Chanon, Nicolas
Chen, Zhiling
Cittolin, Sergio
Dissertori, Günther
Dittmar, Michael
Eugster, Jürg
Freudenreich, Klaus
Grab, Christoph
Hintz, Wieland
Lecomte, Pierre
Lustermann, Werner
Marchica, Carmelo
Martinez Ruiz del Arbol, Pablo
Milenovic, Predrag
Moortgat, Filip
Nägeli, Christoph
Nef, Pascal
Nessi-Tedaldi, Francesca
Pape, Luc
Pauss, Felicitas
Punz, Thomas
Rizzi, Andrea
Ronga, Frédéric J.
Rossini, Marco
Sala, Leonardo
Sanchez, Ann-Karin
Sawley, Marie-Christine
Stieger, Benjamin
Tauscher, Ludwig
Thea, Alessandro
Theofilatos, Konstantinos
Treille, Daniel
Urscheler, Christina
Wallny, Rainer
Weber, Marc
Wehrli, Lukas
Weng, Joanna
et al.
Date
2011-07Type
- Journal Article
Abstract
The tt¯ production cross section and top quark mass are measured in proton-proton 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 identification 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 m top is reconstructed with two different methods, a full kinematic analysis and a matrix weighting technique. The combination yields a measurement of m top = 175.5 ± 4.6 (stat.) ± 4.6 (syst.) GeV/c 2. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000039716Publication status
publishedJournal / series
Journal of High Energy PhysicsVolume
Pages / Article No.
Publisher
SpringerSubject
Hadron-Hadron scatteringOrganisational unit
03381 - Pauss, Felicitas (emeritus)
03593 - Dissertori, Günther / Dissertori, Günther
03904 - Wallny, Rainer / Wallny, Rainer
08803 - Grab, Christoph (Tit.Prof.)
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