We calculate the spin polarizabilities of the nucleon by means of the dispersion relations applied to model-independent pion photoproduction amplitudes both in the N π and Δ π channels. Here, we follow the idea of the 1/N C expansion. By careful application of dispersion relations we show that the spin polarizabilities coincide with those in heavy baryon chiral perturbation theory, if we take the narrow decay-width limit of the Δ particle.
|Number of pages||6|
|Journal||Physical Review C - Nuclear Physics|
|Publication status||Published - 1999 Dec|
ASJC Scopus subject areas
- Nuclear and High Energy Physics