Deep inelastic eγ scattering at high Q2
Abstract The electromagnetic and weak structure functions of the photon can be studied in the deep inelastic electron-photon processes eγ → e + X and eγ → ν + X . While at low energies only virtual photon exchange is operative in the neutral-current process, additional Z -exchange becomes relevant for high Q 2 of order M Z 2 at e + e − linear colliders. Likewise the charged-current process can be observed at these high energy colliders. By measuring the electroweak neutral- and charged-current structure functions, the up- and down-type quark content of the photon can be determined separately.