A measurement is presented of the cross section for electroweak production of a Z boson and a photon in association with two jets (Zγjj) 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 Zγjj 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 Zγjj production and bounds are given on quartic vector boson interactions in the framework of dimension-eight effective field theory operators. [Figure not available: see fulltext.]

Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Brandstetter, J., et al. (2020). Measurement of the cross section for electroweak production of a Z boson, a photon and two jets in proton-proton collisions at sqrt(s) = 13 TeV and constraints on anomalous quartic couplings. JOURNAL OF HIGH ENERGY PHYSICS, 2020(6) [10.1007/JHEP06(2020)076].

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

Benaglia A.;Beschi A.;Brivio F.;Ciriolo V.;Dinardo M. E.;Ghezzi A.;Govoni P.;Guzzi L.;Malberti M.;Monti F.;Moroni L.;Paganoni M.;Ragazzi S.;Tabarelli de Fatis T.;Zuolo D.;Massironi A.;Gerosa R.;Lucchini M. T.;De Guio F.;
2020

Abstract

A measurement is presented of the cross section for electroweak production of a Z boson and a photon in association with two jets (Zγjj) 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 Zγjj 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 Zγjj production and bounds are given on quartic vector boson interactions in the framework of dimension-eight effective field theory operators. [Figure not available: see fulltext.]
Articolo in rivista - Articolo scientifico
Electroweak interaction, Hadron-Hadron scattering (experiments)
English
2020
2020
6
76
none
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Brandstetter, J., et al. (2020). Measurement of the cross section for electroweak production of a Z boson, a photon and two jets in proton-proton collisions at sqrt(s) = 13 TeV and constraints on anomalous quartic couplings. JOURNAL OF HIGH ENERGY PHYSICS, 2020(6) [10.1007/JHEP06(2020)076].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/280462
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