Analysis of the Electroproduction Structure Functions in the Low Region Combining the Vector Meson Dominance and the Parton Model With Possible Scaling Violation
Sep 14, 1987Citations per year
Abstract: (Springer)
The nucleon structure functionF2 is constructed and analysed for low values ofQ2 using the generalised vector meson dominance representation with the largeQ2 spectral function calculated from the analytic continuation of the parton model structure function. Various parametrisations of the parton distributions are considered. Possible effects of the largeQ2 scaling violation on the lowQ2 part of the structure function are investigated. The magnitude of the total contribution given by this asymptotic part can be as high as 50% of the vector meson contribution in the low-Q2, low-χ region. The contribution of the valence quarks alone to the structure function at lowQ2 turns out to be at least as important as the corresponding non-Pomeron Regge-pole-like terms coming from the vector meson part. Increase of the structure function with ν coming from the increase of the quark sea in the limit of small χ implied by QCD turns out to be relatively weak at lowQ2. Predictions of the model are compared with available experimental data. The photoproduction cross section and the nuclear effects in the structure function are also briefly discussed.- ELECTRON NUCLEON: INELASTIC SCATTERING
- INELASTIC SCATTERING: ELECTRON NUCLEON
- ELECTRON LIGHT NUCLEUS: INELASTIC SCATTERING
- INELASTIC SCATTERING: ELECTRON LIGHT NUCLEUS
- MOMENTUM TRANSFER: LOW
- P: STRUCTURE FUNCTION
- NUCLEAR PHYSICS: EFFECT
- MODEL: VECTOR DOMINANCE
- MODEL: PARTON
- QUARK: VALENCE
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