Phenomenology of Forward Hadrons in DIS: Fracture Functions and its $Q^2$ Evolution

Details Phenomenology of Forward Hadrons in DIS: Fracture Functions and its $Q^2$ Evolution Phenomenology of Forward Hadrons in DIS: Fracture Functions and its $Q^2$ Evolution

1997-03-04

arxiv.org/abs/hep-ph/9703228v1

Phys.Rev. D56 (1997) 426-432

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 8 eps files included

Scientific paper

10.1103/PhysRevD.56.426

We analyse recent data on the production of forward neutrons in deep inelastic scattering at HERA in the framework of a perturbative QCD description for semi-inclusive processes, which includes fracture functions. Using a model estimate for the non-perturbative piece of the fragmentation process, in fairly good agreement with the available data, we analyse the $Q^2$ dependence of the resulting fracture functions, which is driven by non-homogeneous evolution equations. We also propose a measurement of the pion production cross section in the target fragmentation region as a new test of perturbative QCD, which in this case predicts also a different $Q^2$ evolution with respect to the one given by the usual Altarelli-Parisi equations.

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