Quadrupole polarizabilities of the pion in the Nambu--Jona-Lasinio model
arXiv:0908.0159 · doi:10.1016/j.physletb.2009.10.018
Abstract
The electromagnetic dipole and quadrupole polarizabilities of the neutral and charged pions are calculated in the Nambu--Jona-Lasinio model. Our results agree with the recent experimental analysis of these quantities based on Dispersion Sum Rules. Comparison is made with the results from the Chiral Perturbation Theory.
9 pages, 1 fig