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Physics  1999 

Pion Scattering Revisited

DOI: 10.1063/1.1301413

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Abstract:

Chiral Ward identities lead to consistent accounting for the sigma's width in the linear sigma model's Feynman rules. Reanalysis of pion scattering data at threshold imply a mass for the sigma of 600+ 200 - 100 MeV.

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