Diphoton generalized distribution amplitudes

We calculate the leading order diphoton generalized distribution amplitudes by calculating the amplitude of the process {gamma}*{gamma}{yields}{gamma}{gamma} in the low energy and high photon virtuality region at the Born order and in the leading logarithmic approximation. As in the case of the anomalous photon structure functions, the {gamma}{gamma} generalized distribution amplitudes exhibit a characteristic lnQ{sup 2} behavior and obey inhomogeneous QCD evolution equations.