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Measurement of W? and Z? production in pp collisions at s=7 TeV

Abstract: A measurement of W? and Z? production in proton?proton collisions at ?s = 7 TeV is presented. Re- sults are based on a data sample recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 36 pb?1. The electron and muon decay channels of the W and Z are used. The total cross sections are measured for photon transverse energy E? T > 10 GeV and spatial separation from charged leptons in the plane of pseudorapidity and azimuthal angle R(, ? ) > 0.7, and with an ad- ditional dilepton invariant mass requirement of M > 50 GeV for the Z? process. The following cross section times branching fraction values are found: ? (pp ? W? + X) × B(W ? ?) = 56.3 ± 5.0(stat.) ± 5.0(syst.) ± 2.3(lumi.) pb and ? (pp ? Z? + X) × B(Z ? ) = 9.4 ± 1.0(stat.) ± 0.6(syst.) ± 0.4(lumi.) pb. These measurements are in agreement with standard model predictions. The first limits on anomalous WW? , ZZ? , and Z? ? trilinear gauge couplings at ?s = 7 TeV are set.

 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., Kasieczka G., Kiesenhofer W., Krammer M., Liko D., Mikulec I., Pernicka M., Rohringer H., Schöfbeck R., Strauss J., Teischinger F., Wagner P., 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, 701(5), 535-555

 Editorial: Elsevier

 Fecha de publicación: 01/07/2011

 Nº de páginas: 21

 Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.physletb.2011.06.034

 ISSN: 0370-2693,1873-2445

 Url de la publicación: https://doi.org/10.1016/j.physletb.2011.06.034

Authorship

CHATRCHYAN, S.

JAVIER ANDRES BROCHERO CIFUENTES

SHANHUEI CHUANG

MARTA FELCINI

MARCOS FERNANDEZ GARCIA

CLARA JORDA LOPE

PATRICIA LOBELLE PARDO

MARIA AMPARO LOPEZ VIRTO

RAFAEL JOSE MARCO DE LUCAS

FRANCISCA JAVIELA MUÑOZ SANCHEZ

ANA YAIZA RODRIGUEZ MARRERO

MARIA DEL MAR SOBRON SAÑUDO