HERA results on the structure of the proton
H.H. Wills Physics Laboratory, University of Bristol, Bristol, UK
2 DESY, Notkestrasse 85, Hamburg, Germany
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A selection of results from the H1 and ZEUS experiments at HERA are reviewed, particularly in the area of deep inelastic scattering and diffraction. Quantum chromodynamics gives a good explanation of these data down to surprisingly low values of the four-momentum transfer, Q 2. Data at smaller Q 2 can be described by Regge models as well as by dipole models including parton-saturation effects. The latter can also give a unified description of many features of diffractive data.
© Società Italiana di Fisica and Springer-Verlag, 2003