Compton Scattering and the Spin Structure of the Nucleon at Low Energies

Thomas R. Hemmert, Barry R. Holstein, Joachim Kambor, Germar Knoechlein

Published 1997-09-29, updated 1998-01-08Version 2

We analyze polarized Compton scattering which provides information on the spin-structure of the nucleon. For scattering processes with photon energies up to 100 MeV the spin-structure dependence can be encoded into four independent parameters-the so-called spin-polarizabilities $\gamma_i, i=1...4$ of the nucleon, which we calculate within the framework of the "small scale expansion" in SU(2) baryon chiral perturbation theory. Specific application is made to "forward" and "backward" spin- polarizabilities.