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Measurement of the Zγ→νν-bar γ Production Cross Section and Limits on Anomalous ZZγ and Zγγ Couplings in pp-bar Collisions at s√=1.96 TeV
Baringer, Philip S. Bean, Alice Clutter, Justace Randall Moulik, Tania Wilson, Graham Wallace
Baringer, Philip S.
Bean, Alice
Clutter, Justace Randall
Moulik, Tania
Wilson, Graham Wallace
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Abstract
We present the first observation of the Zγ→νν-bar γ process at the Fermilab Tevatron at 5.1 standard deviations significance, based on 3.6 fb(−1) of integrated luminosity collected with the D0 detector at the Fermilab Tevatron pp-bar Collider at s√=1.96 TeV. The measured Zγ production cross section multiplied by the branching fraction of Z→νν-bar is 32±9(stat+syst)±2(lumi) fb for the photon E(T)>90 GeV. It is in agreement with the standard model prediction of 39±4 fb. We set limits on anomalous trilinear Zγγ and ZZγ gauge boson couplings, most of which are the most restrictive to date.
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This is the publisher's version, also available electronically from http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.102.201802.
Date
2009-05-22
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American Physical Society
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V. M. Abazov et al. (D0 Collaboration). (2009). "Measurement of the Zγ→νν-bar γ Production Cross Section and Limits on Anomalous ZZγ and Zγγ Couplings in pp-bar Collisions at s√=1.96 TeV." Physical Review Letters, 102(20):201802. http://dx.doi.org/10.1103/PhysRevLett.102.201802.