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Author: WikiMatrix
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Catalan[ca]
El model-sigma va ser introduït per Murray Gell-Mann i Maurice Lévy (ref. 1960, secció 5) i el nom de "σ-model" prové d'un camp del model que corresponia a un mesó sense spin anomenat σ, un escalar introduït anteriorment per Julian Schwinger.
English[en]
The sigma model was introduced by Gell-Mann & Lévy (1960, section 5); the name σ-model comes from a field in their model corresponding to a spinless meson called σ, a scalar meson introduced earlier by Julian Schwinger.