Limits on the anomalous ZZγ and Zγγ couplings in pp̅ collisions at √s=1.8 TeV

Abachi, S. ; Narasimham, V. S. ; et., al (1995) Limits on the anomalous ZZγ and Zγγ couplings in pp̅ collisions at √s=1.8 TeV Physical Review Letters, 75 (6). pp. 1028-1033. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v75/i6/p1028_1

Related URL: http://dx.doi.org/10.1103/PhysRevLett.75.1028

Abstract

We performed a direct search for the anomalous ZZγ and Zγγ couplings by studying pp̅→llγ+X (l=e,μ) events at √s=1.8 TeV with the D0 detector at the Fermilab Tevatron Collider. A fit to the transverse energy spectrum of the photon in the signal events, based on the data set corresponding to an integrated luminosity of 14.3 pb-1 ( 13.7 pb-1) for the electron (muon) channel, yields the following 95% confidence level limits on the anomalous CP-conserving ZZγ couplings: |h30Z|<1.8 (h40Z=0) and |h40Z|<0.5 (h30Z=0), for a form-factor scale λ=500 GeV. Limits for the Zγγ couplings and CP-violating couplings are also discussed.

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Deposited On:02 May 2011 12:46
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