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Causal construction of Yang-Mills theories

IV. Unitarity

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Il Nuovo Cimento A (1965-1970)

Summary

We prove perturbative unitarity of theS-matrix on the physical Hilbert space for Yang-Mills theories with matter fields in the causal approach. Here unitarity is a direct consequence of gauge invariance. To establish the latter, we prove theC-number identities for gauge invariance (Cg-identities).

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Authors and Affiliations

  1. Institut für Theoretische Physik der Universität Zürich, Winterthurerstr. 190, CH-8057, Zürich, Switzerland

    M. Dütsch, T. Hurth & G. Scharf

Authors
  1. M. Dütsch
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  2. T. Hurth
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  3. G. Scharf
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Additional information

Work supported by Schweizerischer Nationalfonds.

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Dütsch, M., Hurth, T. & Scharf, G. Causal construction of Yang-Mills theories. Nuov Cim A 108, 737–773 (1995). https://doi.org/10.1007/BF02813378

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  • DOI: https://doi.org/10.1007/BF02813378

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