Hadronic photon-photon interactions at high energies

TLDR

The study investigates photon‑photon collisions using the two‑component dual parton model. The model incorporates direct, resolved soft, and resolved hard interactions, with parameters fitted to hadron‑hadron and photon‑hadron cross sections, and predicts multiparticle production in hadron‑hadron, photon‑hadron, and photon‑photon collisions, including photon‑photon hadron production at current and future e⁺e⁻ colliders using bremsstrahlung, beamstrahlung, and backscattered laser spectra. The model reproduces hadron production data from hadron‑hadron and photon‑hadron collisions, and shows only transverse‑momentum‑dependent differences in photon‑photon collisions.

Abstract

Photon-photon collisions are investigated in the framework of the two-component dual parton model. The model contains contributions from direct, resolved soft, and resolved hard interactions. All free parameters of the model are determined in fits to hadron-hadron and photon-hadron cross section data. The model is shown to agree well with hadron production data from hadron-hadron and photon-hadron collisions. The multiparticle production in hadron-hadron, photon-hadron, and photon-photon collisions as predicted by the model is compared. Strong differences are only found as a function of the transverse momentum variable. The hadron production in photon-photon collisions at present and future electron-positron colliders is studied using photon spectra according to bremsstrahlung, beamstrahlung, and backscattered laser radiation.