QCD Studies at HERA

Abstract

Several topics from the wide field of QCD studies in Deep-inelastic $ep$ Scattering at HERA are addressed. They include QCD analyses of the inclusive cross section with the determination of ${\alpha }_s$ and the proton gluon density from the $F_2$ scaling violations, and the determination of the longitudinal structure function $F_L$. QCD analyses of inclusive jet and dijet data are also presented. Finally jet substructure and three-jet production are discussed.

16 pages, 17 figures (requires amssymb and epsfig); Talk presented in the Intern. Conference on New Trends in High Energy Physics, 22-29.9.2001, Yalta, Crimea, Ukraine; To appear in the Proceedings