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Limits on Anomalous Trilinear Gauge Couplings in Zγ Events from pp[over ¯] Collisions at sqrt[s]=1.96 TeV
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(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 Research output not available from this repository, contact author.
Official URL: http://dx.doi.org/10.1103/PhysRevLett.107.051802
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 > Physics | ||||
| Journal or Publication Title: | Physical Review Letters | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 0031-9007 | ||||
| Official Date: | 2011 | ||||
| Dates: |
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| 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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