Baryon masses at second order in chiral perturbation theory

Richard F. Lebed, Markus A. Luty

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


We analyze the octet baryon mass differences up to second order in chiral perturbation theory, including the effects of decupletintermediate states. We show that the Coleman-Glashow relation has computable corrections of order (mm-mu)ms. Thesecorrections are numerically small, and in agreement with the data. We also show that corrections to the Σ equal-spacing rule aredominated by electromagnetic contributions, and that the Gell-Mann-Okubo formula has non-analytic corrections of order ms2In ms which cannot be computed from known matrix elements. We also show that the baryon masses cannot be used to extractmodel-independent information about the current quark masses.

Original languageEnglish (US)
Pages (from-to)479-485
Number of pages7
JournalPhysics Letters B
Issue number4
StatePublished - Jun 23 1994
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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