Constraints on anomalous QGCs in e+e- interactions from 183 to 209 GeV

The acoplanar photon pairs produced in the reaction e(+) e(-) --> vvyy are analysed in the 700 pb(-1) of data collected by the ALEPH detector at centre-of-mass energies between 183 and 209 GeV. No deviation from the Standard Model predictions is seen in any of the distributions examined. The resulting 95% C.L. limits set on anomalous QGCs, a(0)(Z), a(c)(Z), a(0)(W) and a(c)(W), are -0.012 < a(0)(Z)/Lambda(2) < +0.019 GeV-2, -0.041 < a(c)(Z)/Lambda(2) < +0.044 GeV-2, -0.060 < a(0)(W)/Lambda(2) < +0.055 GeV-2, -0.099 < a(c)(W)/Lambda(2) < +0.093 GeV-2, where Lambda is the energy scale of the new physics responsible for the anomalous couplings.