Form factors and asymptotic freedom in the O (3) σ-model

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Using the exact form factors we calculate the 2 and 4-particle contributions to the current-current 2-point function in the 2-dimensional O (3) σ-model. The results are consistent with perturbative calculations (including the use of the exact value of the mass gap) and Monte Carlo measurements.

Original languageEnglish
Pages (from-to)145-151
Number of pages7
JournalPhysics Letters B
Issue number1-2
Publication statusPublished - Feb 4 1993


ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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