It is shown by elementary means that the calculation in the Nambu-Jona-Lasinio model of the ratio m_σ²mf² is ambiguous, and the ambiguity is not removed by doing the calculation in a singular limit (Z₃, Z₄=0) of the linear σ model.
No takes yet. Share an insight, caveat, or question.
R. S. Willey (1993) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: