QCD isospin breaking in meson masses, decay constants and quark mass ratios

Research output: Contribution to journalArticle

Abstract

The procedure to calculate masses and matrix-elements in the presence of mixing of the basis states is explained in detail. We then apply this procedure to the two-loop calculation in Chiral Perturbation Theory of pseudoscalar masses and decay constants including quark mass isospin breaking. These results are used to update our analysis of Kℓ4 done previously and obtain a value of mu/md in addition to values for the low-energy-constants Li r.

Details

Authors
Organisations
External organisations
  • Lund University
  • University of Valencia
  • Institut de Physique Nucléaire Orsay (IPN) Orsay
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics

Keywords

  • 11.30.Rd, 12.15.Ff, 12.39.Fe, 13.20.Eb
Original languageEnglish
Pages (from-to)87-108
Number of pages22
JournalNuclear Physics B
Volume602
Issue number1-2
Publication statusPublished - 2001 May 21
Publication categoryResearch
Peer-reviewedYes