Analytic representation of FK /Fπ in two loop chiral perturbation theory

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Abstract

We present an analytic representation of FK/Fπ as calculated in three-flavor two-loop chiral perturbation theory, which involves expressing three mass scale sunsets in terms of Kampé de Fériet series. We demonstrate how approximations may be made to obtain relatively compact analytic representations. An illustrative set of fits using lattice data is also presented, which shows good agreement with existing fits.

Details

Authors
Organisations
External organisations
  • Indian Institute of Science
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Article number091502
JournalPhysical Review D
Volume97
Issue number9
Publication statusPublished - 2018 May 1
Publication categoryResearch
Peer-reviewedYes