title: Complete one-loop analysis of the Nucleon's spin polarizabilities
abstract: We present a complete one-loop analysis of the four nucleon spin polarizabilities in the framework of heavy baryon chiral-perturbation theory. The first nonvanishing contributions to the isovector and first corrections to the isoscalar spin polarizabilities are calculated. No unknown parameters enter these predictions. We compare our results to various dispersive analyses. We also discuss the convergence of the chiral expansion and the role of the delta isobar.
authors.affiliation: Forschungszentrum Julich, Institut fur Kernphysik (Theorie), D-52425 Julich, Germany.
authors.initials: GC
authors.lastname: Gellas
authors.initials: TR
authors.lastname: Hemmert
authors.initials: UG
authors.lastname: Meissner