Study of $Z{\hat{I}}^3$ events and limits on anomalous $ZZ{\hat{I}}^3$ and $Z{\hat{I}}^3{\hat{I}}^3$ couplings in ppbar collisions at $sqrt(s)=1.96$ TeV

Abstract

We present a measurement of the Zγproduction cross section and limits on anomalous ZZγand Zγγcouplings for form-factor scales of Lambda = 750 and 1000 GeV. The measurement is based on 138 (152) candidate events in the eeγ(μμγ) final state using 320 (290) pb^{-1} of ppbar collisions at \sqrt{s} = 1.96 TeV. The 95% C.L. limits on real and imaginary parts of individual anomalous couplings are |h_{10,30}^{Z}|<0.23, |h_{20,40}^{Z}|<0.020, |h_{10,30}^γ|<0.23, and |h_{20,40}^γ|<0.019 for Lambda = 1000 GeV.

submitted to Phys. Rev. Letters