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Study of exclusive two-photon production of W+W- in pp collisions at vs=7 TeV and constraints on anomalous quartic gauge couplings

Abstract: A search for exclusive or quasi-exclusive W+W? production by photon-photon interactions, pp ? p(*)W+W?p(*), at s?=7 TeV is reported using data collected by the CMS detector with an integrated luminosity of 5.05 fb?1. Events are selected by requiring a ? ±e? vertex with no additional associated charged tracks and dilepton transverse momentum p T(? ±e?) > 30 GeV. Two events passing all selection requirements are observed in the data, compared to a standard model expectation of 2.2?±?0.4 signal events with 0.84?±?0.15 background. The tail of the dilepton p T distribution is studied for deviations from the standard model. No events are observed with p T? >?100 GeV. Model-independent upper limits are computed and compared to predictions involving anomalous quartic gauge couplings. The limits on the parameters aW0,C/?2 with a dipole form factor and an energy cutoff ?cutoff?=?500 GeV are of the order of 10?4.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 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., Hörmann N., Hrubec J., Jeitler M., Kiesenhofer W., Knünz V., Krammer M., Krätschmer I., Liko D., Mikulec I., Rabady D., Rahbaran B., Rohringer C., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Treberer-Treberspurg W., Waltenberger W., Wulz C.E., Mossolov V., Shumeiko N., Suare

 Fuente: Journal of High Energy Physics (2013) Volume 2013, issue 7, Article number: 116

Editorial: Springer Verlag

 Fecha de publicación: 18/07/2013

Nº de páginas: 44

Tipo de publicación: Artículo de Revista

 DOI: 10.1007/JHEP07(2013)116

ISSN: 1126-6708,1029-8479

Url de la publicación: https://doi.org/10.1007/JHEP07(2013)116