Compton scattering on protons at low energies
1977; Elsevier BV; Volume: 125; Issue: 3-4 Linguagem: Inglês
10.1016/0550-3213(77)90120-1
ISSN1873-1562
Autores Tópico(s)High-Energy Particle Collisions Research
ResumoOn the basis of new dispersion relations at fixed t, elastic γp scattering was analyzed at photon energies below 400 MeV. In an energy range higher than the π meson photoproduction threshold theoretical predictions are in agreement with experimental data in the whole energy range considered, except at energies near the Δ(1236) resonance for an angle θ = 90°. It is shown that when obtaining the proton polarizability coefficients (α and β) from the available experimental data on γp scattering, it is important to take into account the contribution of the terms with νn (n ≥ 4) to the differential cross-section expansion with respect to ν. Calculations of these terms lead to values of α and β differing considerably from those obtained earlier. New sum rules for proton polarizability coefficients are constructed and analyzed.
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