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Search for Z' resonances decaying to tt- in dilepton+jets final states in pp collisions at root s=7 TeV

Abstract: A search for resonances decaying to top quark-antiquark pairs is performed using a dilepton+jets data sample recorded by the CMS experiment at the LHC in pp collisions at ?s=7 TeV corresponding to an integrated luminosity of 5.0 fb-1. No significant deviations from the standard model background are observed. Upper limits are presented for the production cross section times branching fraction of top quark-antiquark resonances for masses from 750 to 3000 GeV. In particular, the existence of a leptophobic topcolor particle Z? is excluded at the 95% confidence level for resonance masses MZ ?<1.3 TeV for ?Z?=0.012MZ ?, and M<1.9 TeV for ?Z?=0.10MZ ?.

Authorship: Chatrchyan S., Khachatryan V., Sirunyan A.M., Tumasyan A., Adam W., Aguilo E., Bergauer T., Dragicevic M., Erö J., Fabjan C., Friedl M., Frühwirth R., Ghete V.M., Hörmann N., Hrubec J., Jeitler M., Kiesenhofer W., Knünz V., Krammer M., Krätschmer I., Liko D., Mikulec I., Pernicka M., Rabady D., Rahbaran B., Rohringer C., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Waltenberger W., Wulz C.E., Mossolov V., Shumeiko N., Suar

Fuente: Physical Review D - Particles, Fields, Gravitation and Cosmology, 2013, 87, 072002

Publisher: American Physical Society

Publication date: 03/04/2013

No. of pages: 18

Publication type: Article

DOI: 10.1103/PhysRevD.87.072002

ISSN: 1550-7998,1550-2368,2470-0010,2470-0029

Publication Url: https://doi.org/10.1103/PhysRevD.87.072002

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