(2011) Limits on Anomalous Trilinear Gauge Couplings in Zγ Events from pp[over ¯] Collisions at sqrt[s]=1.96 TeV. Physical Review Letters, Vol. 107 (No. 5). doi:10.1103/PhysRevLett.107.051802 ISSN 0031-9007.

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Abstract

Using Zγ candidate events collected by the CDF detector at the Tevatron Collider, we search for potential anomalous (non-standard-model) couplings between the Z boson and the photon. Zγ couplings vanish at tree level and are heavily suppressed at higher orders; hence any evidence of couplings indicates new physics. Measurements are performed using data corresponding to an integrated luminosity of 4.9  fb-1 in the Z→νν̅ decay channel and 5.1  fb-1 in the Z→l+l- (l=μ, e) decay channels. The combination of these measurements provides the most stringent limits to date on Zγ trilinear gauge couplings. Using an energy scale of Λ=1.5  TeV to allow for a direct comparison with previous measurements, we find limits on the CP-conserving parameters that describe Zγ couplings to be |h3γ,Z|<0.022 and |h4γ,Z|<0.0009. These results are consistent with standard model predictions.

Item Type:	Journal Article
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title:	Physical Review Letters
Publisher:	American Physical Society
ISSN:	0031-9007
Official Date:	2011
Dates:	Date Event 2011 Published
Volume:	Vol. 107
Number:	No. 5
DOI:	10.1103/PhysRevLett.107.051802
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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