QED processes in peripheral kinematics at polarized photon–photon and photon–electron colliders

The calibration QED process cross sections for experiments on planned electron–photon and photon–photon colliders for detecting small angle scattered particles are calculated. These processes describe the creation of two jets moving sufficiently close to the beam axis directions. The jets containing two and three particles including charged leptons, photons, and pseudoscalar mesons are considered explicitly. Considering the pair production subprocesses we take into account both bremsstrahlung and double photon mechanisms. The obtained results are suitable for further numerical calculations.