O(θ) Feynman rules for quadrilinear gauge boson couplings in the noncommutative standard model

We examine the electroweak gauge sector of the noncommutative standard model and, in particular, obtain the O(theta) Feynman rules for all quadrilinear gauge boson couplings. Surprisingly, an electroweak-chromodynamics mixing appears in the gauge sector of the noncommutative standard model, where the photon as well as the neutral weak boson is coupled directly to three gluons. The phenomenological perspectives of the model in W-W+ -> ZZ scattering are studied and it is shown that there is a characteristic oscillatory behavior in azimuthal distribution of scattering cross sections that can be interpreted as a direct signal of the noncommutative standard model. Assuming the integrated luminosity 100 fb(-1), the number of W-W+ -> ZZ subprocesses are estimated for some values of noncommutative scale Lambda(NC) at different center of mass energies and the results are compared with predictions of the standard model.