Non-perturbative methods

Abstract

The current theoretical understanding of processes involving many weakly interacting bosons in the Standard Model and in model theories is discussed. In particular, such processes are associated with the baryon and lepton number violation in the Standard Model. The most interesting domain where the multiplicity of bosons is larger than the inverse of small coupling constant is beyond the scope of perturbation theory and requires a non-perturbative analysis.

Plenary talk presented at the 27th International Conference on High Energy Physics, Glasgow, Scotland, 20-27 July 1994. 28 pages in LaTeX, 5 figures, one figure in PostScript, appended to the file. TPI-MINN-94/33-T, UMN-TH-1314-94

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• Improved XTZ masses and mass ratios from Laplace Sum Rules at NLO
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