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URN: urn:nbn:de:swb:90-702211
Originalveröffentlichung
DOI: 10.1016/j.physletb.2017.04.071

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

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.


Zugehörige Institution(en) am KIT Institut für Experimentelle Kernphysik (IEKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 0370-2693, 1873-2445
URN: urn:nbn:de:swb:90-702211
KITopen ID: 1000070221
Erschienen in Physics letters / B
Band 770
Seiten 380-402
Schlagworte CMS, Physics, aQGC, Electroweak production
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