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Photo of Johan Bijnens

Johan Bijnens

Professor

Photo of Johan Bijnens

Two-point functions and S-parameter in QCD-like theories

Author

  • Johan Bijnens
  • Jie Lu

Summary, in English

We calculated the vector, axial-vector, scalar and pseudo-scalar two-point functions up to two-loop level in the low-energy effective field theory for three different QCD-like theories. In addition we also calculated the pseudo-scalar decay constant G M. The QCD-like theories we used are those with fermions in a complex, real or pseudoreal representation with in general n flavours. These case correspond to global symmetry breaking pattern of SU(n)(L) x SU(n)(R) -> SU(n)(V), SU(2n) -> SO(2n) or SU(2n) -> Sp(2n). We also estimated the S parameter for those different theories.

Department/s

  • Theoretical Particle Physics

Publishing year

2012

Language

English

Publication/Series

Journal of High Energy Physics

Issue

1

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Keywords

  • Spontaneous Symmetry Breaking
  • Chiral Lagrangians
  • Technicolor and
  • Composite Models
  • Lattice Quantum Field Theory

Status

Published

ISBN/ISSN/Other

  • ISSN: 1029-8479