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Measurement of the cross section for electroweak production of a Z boson, a photon and two jets in proton-proton collisions at ?s = 13 TeV and constraints on anomalous quartic couplings

Abstract: A measurement is presented of the cross section for electroweak production of a Z boson and a photon in association with two jets (Z?jj) in proton-proton collisions. The Z boson candidates are selected through their decay into a pair of electrons or muons. The process of interest, electroweak Z?jj production, is isolated by selecting events with a large dijet mass and a large pseudorapidity gap between the two jets. The measurement is based on data collected at the CMS experiment at ?s = 13 TeV, corresponding to an integrated luminosity of 35.9 fb-1. The observed significance of the signal is 3.9 standard deviations, where a significance of 5.2 standard deviations is expected in the standard model. These results are combined with published results by CMS at ?s = 8 TeV, which leads to observed and expected respective significances of 4.7 and 5.5 standard deviations. From the 13 TeV data, a value is obtained for the signal strength of electroweak Z?jj production and bounds are given on quartic vector boson interactions in the framework of dimension-eight effective field theory operators.

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

 Fuente: Journal of High Energy Physics, Vol. 2020, Num. 06, Art. Num. 076

Editorial: Springer Verlag

 Fecha de publicación: 01/06/2020

Nº de páginas: 42

Tipo de publicación: Artículo de Revista

 DOI: 10.1007/JHEP06(2020)076

ISSN: 1126-6708,1029-8479

Url de la publicación: https://doi.org/10.1007/JHEP06(2020)076