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g AgV from chiral symmetry breaking

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Zeitschrift für Physik C Particles and Fields

Abstract

The ratio of the axial to vector neutron decay constants is determined via QCD sum rules. The advantageous use of the arbitrariness in the definition of the nucleon operator leads to a result which is unambiguous. The only input parameter is the value of the chiral symmetry breaking vacuum quark condensate.\(\langle \bar \Psi \Psi \rangle ^{{1 \mathord{\left/ {\vphantom {1 3}} \right. \kern-\nulldelimiterspace} 3}} = - 250 MeV\) the output isg A/gV=1.22.

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Author notes

  1. Roman Koniuk

    Present address: Department of Physics, York University, 4700 Keele Street, Downsview, Ontario, Canada

  2. Rolf Tarrach

    Present address: Department of Theoretical Physics, University of Barcelona, Diagonal 645, Barcelona 28, Spain

Authors and Affiliations

  1. Department of Theoretical Physics, University of Oxford, 1 Keble Road, OX1 3NP, Oxford, UK

    Roman Koniuk & Rolf Tarrach

Authors
  1. Roman Koniuk
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  2. Rolf Tarrach
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Koniuk, R., Tarrach, R. g AgV from chiral symmetry breaking. Z. Phys. C - Particles and Fields 18, 179–184 (1983). https://doi.org/10.1007/BF01572481

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  • DOI: https://doi.org/10.1007/BF01572481

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