Measurement of the production cross section for Zγ → νν‾γ in pp collisions at √s = 7 TeV and limits on ZZγ and Zγγ triple gauge boson couplings

CMS Collaboration

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A measurement of the Zγ → νν‾γ cross section in pp collisions at √s = 7 TeV is presented, using data corresponding to an integrated luminosity of 5.0 fb-1 collected with the CMS detector. This measurement is based on the observation of events with an imbalance of transverse energy in excess of 130 GeV and a single photon in the absolute pseudorapidity range |η| < 1.4 with transverse energy above 145 GeV. The Zγ → νν‾γ production cross section is measured to be 21.1±4.2 (stat:)±4.3 (syst.)±0.5 (lum.) fb, which agrees with the standard model prediction of 21.9±1.1 fb. The results are combined with the CMS measurement of Zγ production in the l+l -γ final state (where l is an electron or a muon) to yield the most stringent limits to date on triple gauge boson couplings: |hZ3| < 2.7 x 10-3, |hZ4| < 1.3 x 10-5 for ZZγ and |hγ3| < 2.9 x 10-3, |hγ4| < 1.5 x 10-5 for Zγγ couplings.
Original languageEnglish
Article number164
Number of pages30
JournalJournal of High Energy Physics
Issue number10
Publication statusPublished - 2013
Externally publishedYes


  • Hadron-Hadron Scattering

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