The e+eZγγqqˉγγe^{+} e^{-} \to Z \gamma \gamma \to q \bar{q} \gamma \gamma reaction at LEP and constraints on anomalous quartic gauge boson couplings

Collaboration
May, 2002

Citations per year

2002200720122017202201234567
Abstract: (Elsevier)
The cross section of the process e + e − → Z γ γ → q q ¯ γ γ is measured with 215 pb −1 of data collected with the L3 detector during the final LEP run at centre-of-mass energies around 205 GeV and 207 GeV. No deviation from the Standard Model expectation is observed. The full data sample of 713 pb −1 , collected above the Z resonance, is used to constrain the coefficients of anomalous quartic gauge boson couplings to: − 0.02   GeV − 2 < a 0 / Λ 2 < 0.03   GeV − 2 , − 0.07   GeV − 2 < a c / Λ 2 < 0.05   GeV − 2 , at 95% confidence level.
  • electron positron: colliding beams
  • electron positron: annihilation
  • photon: pair production
  • Z0: associated production
  • Z0: hadronic decay
  • coupling: (4gauge boson)
  • channel cross section: energy dependence
  • electroweak interaction: validity test
  • L3
  • experimental results