Advertisement

Analysis of the pion-kaon sigma term and related topics

  • M. Frink
  • B. Kubis
  • U.-G. Meißner
Theoretical Physics

Abstract.

We calculate the one-loop contributions to the difference \(\Delta_\pi K\) between the isoscalar on-shell pion-kaon scattering amplitude at the Cheng-Dashen point and the scalar form factor \(\Gamma_K (2M_\pi_2)\) in the framework of three flavor chiral perturbation theory. These corrections turn out to be small. This is further sharpened by treating the kaons as heavy fields (two flavor chiral perturbation theory). We also analyze the two-loop corrections to the kaon scalar form factor based on a dispersive technique. We find that these corrections are smaller than in the comparable case of the scalar form factor of the pion. This is related to the weaker final state interactions in the pion-kaon channel.

Keywords

Form Factor Perturbation Theory State Interaction Related Topic Scalar Form 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg / Società Italiana di Fisica 2002

Authors and Affiliations

  • M. Frink
    • 1
  • B. Kubis
    • 1
  • U.-G. Meißner
    • 1
  1. 1.Forschungszentrum Jülich, Institut für Kernphysik (Theorie), 52425 Jülich, Germany DE

Personalised recommendations