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

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 identification are obtained and combined. The measured value is ?t¯t = 168 ± 18 (stat.) ± 14 (syst.) ± 7 (lumi.) pb, consistent with predictions from the standard model. The top quark mass mtop is reconstructed with two different 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. .

Autoría: Chatrchyan S., Khachatryan V., Sirunyan A.M., Tumasyan A., Adam W., Bergauer T., Dragicevic M., Erö J., Fabjan C., Friedl M., Frühwirth R., Ghete V.M., Hammer J., Hänsel S., Hoch M., Hörmann N., Hrubec J., Jeitler M., Kiesenhofer W., Krammer M., Liko D., Mikulec I., Pernicka M., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Teischinger F., Wagner P., Waltenberger W., Walzel G., Widl E., Wulz C.E., Mossolov V., Shumeiko N.,

Fuente: Journal of High Energy Physics, 2011, 2011(7), 49

Editorial: Springer Verlag

Fecha de publicación: 01/07/2011

Nº de páginas: 49

Tipo de publicación: Artículo de Revista

DOI: 10.1007/JHEP07(2011)049

ISSN: 1126-6708,1029-8479

Url de la publicación: https://doi.org/10.1007/JHEP07(2011)049

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