Limits on Anomalous WWγ Couplings from p ¯ p→Wγ+X Events at √s=1.8 TeV

Abachi, S. and Belyaev, Alexander (1997) Limits on Anomalous WWγ Couplings from p ¯ p→Wγ+X Events at √s=1.8 TeV. Physical Review Letters, 78, 3634-3639. (doi:10.1103/PhysRevLett.78.3634).

Abstract

We have measured the WWγ gauge boson coupling parameters using p ¯ p→ℓνγ+X ( ℓ=e,μ) events at √s=1.8 TeV. The data, corresponding to an integrated luminosity of 92.8pb−1, were collected using the DØ detector at the Fermilab Tevatron Collider. The measured cross section times branching ratio for p ¯ p→Wγ+X with p γ T>10 GeV/c and Rℓγ>0.7 is 11.3 +1.7 −1.5±1.5 pb, in agreement with the standard model prediction. The 1 degree of freedom 95% confidence level limits on individual CP-conserving parameters are −0.93<Δκ<0.94 and −0.31<λ<0.29. Similar limits are set on the CP-violating coupling parameters.

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Contributors

Author: Alexander Belyaev

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