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Photo of Johan Bijnens

Johan Bijnens

Professor

Photo of Johan Bijnens

The pion mass and decay constant at three loops in two-flavour chiral perturbation theory

Author

  • Johan Bijnens
  • Nils Hermansson Truedsson

Summary, in English

A calculation of the pion mass and decay constant at NNNLO in two-flavour chiral perturbation theory is presented. The results are cross-checked by using both the exponential and square root parametrizations of the Goldstone matrix field, as well as by comparing to the known leading log coefficients of the two quantities. A small numerical study of the quark mass dependence is performed, and for a physical quark mass there is good agreement with lower order results.

Department/s

  • Theoretical Particle Physics

Publishing year

2017-11-01

Language

English

Publication/Series

Journal of High Energy Physics

Volume

2017

Issue

11

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Keywords

  • Chiral Lagrangians
  • Effective Field Theories

Status

Published

Project

  • Higher Order Calculations for Low Energy Precision Physics

ISBN/ISSN/Other

  • ISSN: 1029-8479