Quadrupole polarizabilities of the pion in the Nambu--Jona-Lasinio model
Brigitte Hiller, Wojciech Broniowski, Alexander A. Osipov, Alex H., Blin
TL;DR
This paper calculates the quadrupole polarizabilities of pions using the Nambu--Jona-Lasinio model, showing agreement with recent experimental data and comparing with Chiral Perturbation Theory results.
Contribution
It provides a novel calculation of pion quadrupole polarizabilities within the NJL model and compares these with experimental and Chiral Perturbation Theory results.
Findings
Results agree with recent experimental analysis.
Comparison with Chiral Perturbation Theory shows consistency.
Provides insights into pion electromagnetic properties.
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.
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