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Limits on anomalous WWγW W \gamma couplings from ppˉ→Wγ+Xp\bar{p} \to W \gamma + X events at s=1.8\sqrt{s} = 1.8 TeV

Collaboration
Dec, 1996
10 pages
Published in:
  • Phys.Rev.Lett. 78 (1997) 3634-3639
e-Print:
DOI:
Report number:
  • FERMILAB-PUB-96-434-E,
  • D0-PUB-96-14,
  • FSU-SCRI-97-71
Experiments:
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Abstract: (arXiv)
We have measured the WWγWW\gamma gauge boson coupling parameters using ppˉ→ℓνγ+Xp\bar{p}\to \ell\nu\gamma+X (ℓ=e,μ\ell=e,\mu) events at s=1.8\sqrt{s}=1.8 TeV. The data, corresponding to an integrated luminosity of 89.1 pb^{-1}, were collected using the D0 detector at the Fermilab Tevatron Collider. The measured cross section times branching ratio for ppˉ→Wγ+Xp\bar{p} \to W\gamma+X with pTγp_T^\gamma > 10 GeV/c and Rℓγ>0.7R_{\ell\gamma} > 0.7 is 11.8−1.6+1.7±2.0{11.8}^{+1.7}_{-1.6} \pm 2.0 pb, in agreement with the Standard Model prediction. The one degree of freedom 95% confidence level limits on individual CP-conserving parameters are -0.98<\Delta\kappa<1.01 and -0.33<\lambda<0.31. Similar limits are set on the CP}violating coupling parameters.
Note:
  • 10 pages, including two figures. Paper submitted to Phys. Rev. Lett
  • anti-p p: colliding beams
  • anti-p p: inclusive reaction
  • W: hadroproduction
  • photon: associated production
  • coupling: (2W photon)
  • W: leptonic decay
  • channel cross section: branching ratio
  • invariance: CP
  • DZERO
  • experimental results