Su(3)-breaking mechanisms for pseudoscalar-meson charge radii

Ll Ametller, C. Ayala, A. Bramon

Research output: Contribution to journalArticleResearchpeer-review

13 Citations (Scopus)


The sum rule r+2-rK+2=nrK02 for pseudoscalar-meson charge radii is discussed. Working at the one-loop or quark-triangle approximation and assuming moderate SU(3) breaking for the constituent quark masses, one obtains n=-52. Experimental data are compatible with this value, but contradict the value n=-1 coming from vector-meson-dominance or U-spin symmetry-breaking mechanisms. © 1981 The American Physical Society.
Original languageEnglish
Pages (from-to)233-235
JournalPhysical Review D
Issue number1
Publication statusPublished - 1 Jan 1981


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