Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-11-19
Prog.Part.Nucl.Phys.44:459-460,2000
Physics
High Energy Physics
High Energy Physics - Phenomenology
2 pages, 1 figure Talk given at the Erice School on Nuclear Physics, Erice, Sicily, Italy September 17-25, 1999
Scientific paper
10.1016/S0146-6410(00)00098-3
Fixed-$t$ subtracted dispersion relations are presented for Compton scattering off the nucleon at energies $E_\gamma \leq 500$ MeV, as a formalism to extract the nucleon polarizabilities from the data with a minimum of model dependence. The scalar polarizabilities difference $\alpha - \beta$ and the backward spin polarizability $\gamma_\pi$ enter directly as fit parameters in this formalism.
Drechsel Dieter
Gorchtein Mikhail
Pasquini Barbara
Vanderhaeghen Marc
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