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Photo of Johan Bijnens

Johan Bijnens

Professor

Photo of Johan Bijnens

K to pi pi decays in SU(2) Chiral Perturbation Theory

Author

  • Johan Bijnens
  • Alejandro Celis

Summary, in English

We study the decays $K\to\pi\pi$ in one-loop

two-flavour Chiral Perturbation Theory.

We provide arguments why the calculation of the coefficient of the

pionic chiral logarithm

$\logm = M^2\log M^2$

is unique and then perform the calculation. As a check we perform the

reduction of the known three-flavour result.

Our result can be used to perform the extrapolation to the physical

pion mass of direct lattice QCD calculations of $K\to\pi\pi$

at fixed $m_s$ or $m_K^2$.

The underlying arguments

are expected to be valid for heavier particles and other processes as well.

Department/s

  • Theoretical Particle Physics - Undergoing reorganization

Publishing year

2009

Language

English

Pages

466-470

Publication/Series

Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

Volume

680

Issue

5

Document type

Journal article

Publisher

Elsevier

Topic

  • Subatomic Physics

Keywords

  • 11.30.Rd Chiral symmetries
  • 12.39.Fe Chiral Lagrangians
  • 13.20.Eb Decays of K mesons

Status

Published

ISBN/ISSN/Other

  • ISSN: 0370-2693