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First measurement of the cross section for top-quark pair production in proton-proton collisions at vs=7 TeV

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 ?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

Authorship: 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., Hartl C., Hoch M., Hörmann N., Hrubec J., Jeitler M., Kasieczka G., Kiesenhofer W., Krammer M., Liko D., Mikulec I., Pernicka M., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Teischinger F., Waltenberger W., Walzel G., Widl E., Wulz C.E., Mossolov V., Shumeiko N.,

Fuente: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2011, 695(5), 424-443

Publisher: Elsevier

Publication date: 01/01/2011

No. of pages: 20

Publication type: Article

DOI: 10.1016/j.physletb.2010.11.058

ISSN: 0370-2693,1873-2445

Publication Url: https://doi.org/10.1016/j.physletb.2010.11.058

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