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Measurement of the cross section for electroweak production of Zγ in association with two jets and constraints on anomalous quartic gauge couplings in proton–proton collisions at √s=8 TeV

CMS Collaboration; Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; König, A.; Krätschmer, I.; ... mehr

Abstract:
A measurement is presented of the cross section for the electroweak production of a Z boson and a photon in association with two jets in proton–proton collisions at √s = 8 TeV. The Z bosons are identified through their decays to electron or muon pairs. The measurement is based on data collected with the CMS detector corresponding to an integrated luminosity of 19.7 fb$^{-1}$. The electroweak contribution has a significance of 3.0 standard deviations, and the measured fiducial cross section is 1.86$\substack{+0.90\\-0.75}$ (stat) $\substack{+0.34\\-0.26}$ (syst) $\substack{+\\-}$ 0.05 (lumi) fb, while the summed electroweak and quantum chromodynamic total cross section in the same region is observed to be 5.94$\substack{+1.53\\-1.35}$ (stat)$\substack{+0.43\\-0.37}$ (syst) $\substack{+\\-}$ 0.13 (lumi) fb. Both measurements are consistent with the leading-order standard model predictions. Limits on anomalous quartic gauge couplings are set based on Ζγ the mass distribution.

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Volltext §
DOI: 10.5445/IR/1000070221
Originalveröffentlichung
DOI: 10.1016/j.physletb.2017.04.071
Scopus
Zitationen: 15
Web of Science
Zitationen: 9
Coverbild
Zugehörige Institution(en) am KIT Institut für Experimentelle Kernphysik (IEKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 0370-2693, 1873-2445
urn:nbn:de:swb:90-702211
KITopen-ID: 1000070221
Erschienen in Physics letters / B
Band 770
Seiten 380-402
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Schlagworte CMS, Physics, aQGC, Electroweak production
Nachgewiesen in Scopus
Web of Science
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