Direct tests ofCP-violating triple gauge boson couplings in photonic linear colliders

Possible tests of the $\mathrm{CP}$-violating triple gauge bosons couplings in $\gamma \gamma \to \mathrm{WW}$ and $e\gamma \to W\nu$ are discussed. Using either circular or linear polarization of the initial photon laser beam, direct measurements of $\mathrm{CP}$-odd observables in $\gamma \gamma \to W^{+}{W}^{-}$ are possible. We obtain limits on the coefficient of the $\mathrm{CP}$-violating coupling of $\mathcal{R}\left(f_6\right)<\mathrm{}0.9\mathrm{}\times {10}^{-2\mathrm{}}$ and $\mathcal{J}\left(f_6\right)<\mathrm{}5.4\mathrm{}\times {10}^{-4\mathrm{}}$ for $\sqrt{s}=1\mathrm{}$ TeV. These are then compared with the limits obtained from the total cross section with or without polarized beams in $\gamma \gamma$ and with different asymmetries in $e\gamma$.