Photon and electron induced particle production on nuclei

ar X iv : n uc l - th / 0 10 80 18 v 1 8 A ug 2 00 1 1 Photon and Electron induced Particle Production on Nuclei ∗

Qcd Effects in Particle Production on Nuclei

I discuss some questions related to hard scattering processes in nuclei and corrections to the leading twist approximation. The QCD factorization theorem requires that high energy partons do not lose energy while traversing the nucleus. I explain the physical reason for this. The theorem also states that spectator partons, not involved in the hard collision, have no influence on the inclusive c...

Electron and Photon induced Reactions on Nuclei in the Nucleon Resonance Region∗

We calculate total photon-nucleus and electron-nucleus cross sections γA → X, eA → e′X and several cross sections on pion and eta production in nuclei in the energy regime between the first and the third resonance region for photon virtualities Q2 ≤ 1.0 GeV2 within a semi-classical BUU transport model. In both cases we discuss the varying influence of several medium modifications on the cross s...

PHOTOPRODUCTION OFF NUCLEI AND POINT-LIKE PHOTON INTERACTIONS Part II: Particle Production

High energy multiparticle photoproduction off nuclear targets is studied. The photon is assumed to interact in direct scattering processes or as a resolved qq̄-state according to the Generalized Vector Dominance Model. In the description of resolved interactions multiple soft and hard processes in each qq̄-nucleon interaction are taken into consideration. The model, formulated within the framewor...

Sparticle Production in Electron - Photon

We explore the potential of electron-photon colliders to measure fundamental supersymmetry parameters via the processes ee ! ~ e~ 0 (selectron-neutralino) and ee ! ~ ~ ? (sneutrino-chargino). Given the ~ 0 and ~ ? masses from e + e ? and hadron collider studies, cross section ratios (?)==(+) for opposite photon helicities determine the ~ L , ~ e L and ~ e R masses, independent of the sparticle ...