# Johan Bijnens

Professor

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

Author

## Summary, in English

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

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

Links

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