Limits on Anomalous Trilinear Gauge Couplings in Zγ Events from pp over ¯ Collisions at sqrt s =1.96 TeV.
| Author | |
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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→νν[over ¯] 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 |h_{3}^{γ,Z}|<0.022 and |h_{4}^{γ,Z}|<0.0009. These results are consistent with standard model predictions. |
| Year of Publication |
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1969
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| Journal |
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Physical review letters
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| Volume |
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107
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| Issue |
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5
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| Number of Pages |
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051802
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| Date Published |
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2011 Jul 29
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| ISSN Number |
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0031-9007
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| URL |
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http://link.aps.org/abstract/PRL/v107/p051802
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| Short Title |
:
Limits on Anomalous Trilinear Gauge Couplings in Zγ Events from
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