Pion Form Factor and Ambiguities in a Renormalizable Version of the Nambu-Jona-Lasinio Model

Details Pion Form Factor and Ambiguities in a Renormalizable Version of the Nambu-Jona-Lasinio Model Pion Form Factor and Ambiguities in a Renormalizable Version of the Nambu-Jona-Lasinio Model

2003-11-05

arxiv.org/abs/hep-th/0311032v1

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, 2 figures

Scientific paper

We analyze the presence of an ambiguity in the pion electromagnetic form factor within a renormalizable version of the Nambu-Jona-Lasinio model. We found out that the ambiguity present on the evaluation of the form factor decouples from its transversal part, confirming previous results obtained ignoring the ambiguity. This result helps us to understand the role played by finite but undetermined quantities in Quantum Field Theories.

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