2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/38159The cross section for producing three high transverse energy jets with a three-jet invariant mass of M_3J > 50 GeV has been measured in photoproduction at HERA. The angular distribution of the three jets is presented and found to be inconsistent with a uniform population of the available phase space. In contrast, parton shower models and O(alpha alpha_s^2) pQCD calculations are able to describe the three jet dynamics.4 pages, 3 eps figures; to appear in the proceedings of the 6th International Workshop on Deep Inelastic Scattering and QCDHigh Energy Physics - Experimenttext