Measurement of the tt-production cross section in the dilepton channel in pp collisions at √s = 7 TeV

S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, E. Aguilo, T. Bergauer, M. Dragicevic, J. Erö, C. Fabjan, M. Friedl, R. Frühwirth, V. M. Ghete, J. Hammer, N. Hörmann, J. Hrubec, M. Jeitler, W. Kiesenhofer, V. Knünz, M. KrammerI. Krätschmer, D. Liko, I. Mikulec, M. Pernickay, B. Rahbaran, C. Rohringer, H. Rohringer, R. Schöfbeck, J. Strauss, A. Taurok, W. Waltenberger, G. Walzel, E. Widl, C. E. Wulz, V. Mossolov, N. Shumeiko, J. Suarez Gonzalez, S. Bansal, T. Cornelis, E. A. De Wolf, X. Janssen, S. Luyckx, L. Mucibello, S. Ochesanu, B. Roland, R. Rougny, M. Selvaggi, Z. Staykova, H. Van Haevermaet, P. Van Mechelen, N. Van Remortel, A. Van Spilbeeck, F. Blekman, S. Blyweert, J. D'Hondt, R. Gonzalez Suarez, A. Kalogeropoulos, M. Maes, A. Olbrechts, W. Van Doninck, P. Van Mulders, G. P. Van Onsem, I. Villella, B. Clerbaux, G. De Lentdecker, V. Dero, A. P.R. Gay, T. Hreus, A. Léonard, P. E. Marage, T. Reis, L. Thomas, C. Vander Velde, P. Vanlaer, J. Wang, V. Adler, K. Beernaert, A. Cimmino, S. Costantini, G. Garcia, M. Grunewald, B. Klein, J. Lellouch, A. Marinov, J. McCartin, A. A. Ocampo Rios, D. Ryckbosch, N. Strobbe, F. Thyssen, M. Tytgat, P. Verwilligen, S. Walsh, E. Yazgan, N. Zaganidis, S. Basegmez, G. Bruno, R. Castello, L. Ceard, C. Delaere, T. Du Pree

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59 Scopus citations

Abstract

The tt- production cross section (σtt-) is measured in proton-proton collisions at √s = 7TeV in data collected by the CMS experiment, corresponding to an integrated luminosity of 2.3 fb-1. The measurement is performed in events with two leptons (electrons or muons) in the final state, at least two jets identified as jets originating from b quarks, and the presence of an imbalance in transverse momentum. The measured value of σtt- for a top-quark mass of 172.5 GeV is 161:9 ± 2:5 (stat.) +5:1 -5:0 (syst.) ± 3:6 (lumi.) pb, consistent with the prediction of the standard model.

Original languageEnglish (US)
Article number67
JournalJournal of High Energy Physics
Volume2012
Issue number11
DOIs
StatePublished - 2012
Externally publishedYes

Keywords

  • Hadron-hadron scattering

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