arXiv:0908.0159·v1·High Energy Physics — Phenomenology
Quadrupole polarizabilities of the pion in the Nambu--Jona-Lasinio model
Brigitte Hiller🇵🇹 · Wojciech Broniowski🇵🇱 · Alexander A. Osipov🇵🇹 · Alex H. Blin🇵🇹
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.
Comments: 9 pages, 1 fig