Production of single WW bosons at S\sqrt{S} = 189-GeV and measurement of WWγW W \gamma gauge couplings

Collaboration
May, 2000
17 pages
Published in:
  • Phys.Lett.B 487 (2000) 229-240
e-Print:
Report number:
  • CERN-EP-2000-066
Experiments:

Citations per year

2000200420082012201602468
Abstract: (Elsevier)
Single W boson production in electron-positron collisions is studied with the L3 detector at LEP. The data sample collected at a centre-of-mass energy of s =188.7 GeV corresponds to an integrated luminosity of 176.4 pb −1 . Events with a single energetic lepton or two acoplanar hadronic jets are selected. Within phase-space cuts, the total cross-section is measured to be 0.53±0.12±0.03 pb , consistent with the Standard Model expectation. Including our single W boson results obtained at lower s , the WW γ gauge couplings κ γ and λ γ are determined to be κ γ =0.93±0.16±0.09 and λ γ =−0.31 +0.68 −0.19 ±0.13.
  • electron positron: colliding beams
  • electron positron: annihilation
  • W: electroproduction
  • W: hadronic decay
  • W: leptonic decay
  • channel cross section: energy dependence
  • electroweak interaction: validity test
  • coupling: (2W photon)
  • final state: (2jet)
  • lepton: final state