Your browser has javascript turned off or blocked. This will lead to some parts of our website to not work properly or at all. Turn on javascript for best performance.

The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here:

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Photo of Johan Bijnens

Johan Bijnens


Photo of Johan Bijnens

Meson Decay with Isospin Breaking At Two Loops.


  • Karim Ghorbani

Summary, in English

In all calculations done in this thesis, the evaluation of higher order quantum corrections has been central. In the first paper included in this thesis we have investigated the effects of finite volume meson propagators for quark-antiquark vacuum expectation value at two-loop level. In the second paper we have improved the earlier calculations for the eta decay to three pions by implementing two-loop quantum corrections. The low energy constants of order p6 are estimated by means of a resonance chiral Lagrangian. In addition, the experimental charged decay rate leads to the determination for the isospin breaking quantities. Finally, we have studied the isospin breaking effects on the vector and scalar form-factor of semi-leptonic decays. Semi-leptonic kaon decays, both rare and weak semi-leptonic decays. Semi-leptonic kaon decays provide a rich laboratory to find the CKM matrix element Vus and the possible new physics beyond the Standard Model in flavor sector.


  • Theoretical Particle Physics

Publishing year




Document type



Department of Theoretical Physics, Lund University


  • Subatomic Physics


  • kvantfältteori
  • Elementarpartikelfysik
  • quantum field theory
  • Elementary particle physics
  • Naturvetenskap
  • Natural science
  • hadron physics
  • standard model
  • chiral Lagrangian
  • quantum correction




  • Johan Bijnens


  • ISBN: 978-91-628-7298-4

Defence date

23 November 2007

Defence time


Defence place

Lund University Theoretical physics department Sölvegatan 14A Lecture Hall F


  • Gilberto Colangelo (Professor)