Información de la publicación

Portal del Investigador > en > Publications > publication-detail

Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC

Abstract: A multivariate likelihood method to measure electroweak couplings with the Drell?Yan process at the LHC is presented. The process is described by the dilepton rapidity, invariant mass, and decay angle distributions. The decay angle ambiguity due to the unknown assignment of the scattered constituent quark and antiquark to the two protons in a collision is resolved statistically using correlations between the observables. The method is applied to a sample of dimuon events from proton-proton collisions at ffiffis p ¼ 7 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 1:1 fb1. From the dominant uu, dd ! =Z ! þ process, the effective weak mixing angle parameter is measured to be sin2eff ¼ 0:2287 0:0020 ðstat:Þ 0:0025 ðsyst:Þ. This result is consistent with measurements from other processes, as expected within the standard model.

Authorship: 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., Rahbaran B., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Teischinger F., Trauner C., Wagner P., Waltenberger W., Walzel G., Widl E., Wulz C.E.,

Fuente: Physical Review D - Particles, Fields, Gravitation and Cosmology, 2011, 84(11), 112002

Publisher: American Physical Society

Publication date: 01/12/2011

No. of pages: 23

Publication type: Article

DOI: 10.1103/PhysRevD.84.112002

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

Publication Url: https://doi.org/10.1103/PhysRevD.84.112002

SCOPUS