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Photo of Johan Bijnens

Johan Bijnens

Professor

Photo of Johan Bijnens

Meson Decay with Isospin Breaking At Two Loops.

Author

  • 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.

Department/s

  • Theoretical Particle Physics

Publishing year

2007

Language

English

Document type

Dissertation

Publisher

Department of Theoretical Physics, Lund University

Topic

  • Subatomic Physics

Keywords

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

Status

Published

Supervisor

  • Johan Bijnens

ISBN/ISSN/Other

  • ISBN: 978-91-628-7298-4

Defence date

23 November 2007

Defence time

10:15

Defence place

Lund University Theoretical physics department Sölvegatan 14A Lecture Hall F

Opponent

  • Gilberto Colangelo (Professor)