Are Pions Perturbative in Effective Field Theory?

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It is shown that pions can be included perturbatively into effective field theory only for the external momenta, well below the pion mass. But for such low energies it is not necessary to include pions explicitly.
10 pages, 4 figures. More details included, different arguments given

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Nuclear Theory, High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/82925

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/nucl-th/9806028
 http://arxiv.org/abs/nucl-th/9806028

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arXiv