Baryons as solitons in the effective Lagrangian of spontaneously broken chiral symmetry
I present the calculation of the effective Lagrangian from the σ quark model based on some reasonable assumptions of the spontaneously broken chiral symmetry, the large-Nc limit, and the nature of the effective action expansion. In addition to the Skyrme Lagrangian with a unique coupling constant e=π[2(3/Nc)]1/2 and the Wess-Zumino term, it contains an extra new term (Nc/96π2) Tr (μLμ)2 which must be treated as a perturbative correction. This new term is responsible for the correct pion form factor corresponding to mρ2=8π2fπ2(3/Nc). This model can be used to describe the rich low-energy dynamics of baryons and mesons with the unique mass scale fπ. © 1985 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Chan, L. (1985). Baryons as solitons in the effective Lagrangian of spontaneously broken chiral symmetry. Physical Review Letters, 55 (1), 21-24. https://doi.org/10.1103/PhysRevLett.55.21