Light-quark masses and isospin violation

David J. Gross, S. B. Treiman, Frank Wilczek

Research output: Contribution to journalArticlepeer-review

218 Scopus citations


Isospin-violating effects arising from a nonvanishing quark mass difference md-mu are discussed, in particular for the +-0 mass-difference question and for 3 and +e+ decays. The role of the strong anomaly is emphasized, and exploited to bring out certain relations among heavy-quark, light-quark, and gluon operator matrix elements. The anomaly suppresses isospin-violating effects that might otherwise be substantial for the Bjorken electroproduction sum rule.

Original languageEnglish (US)
Pages (from-to)2188-2196
Number of pages9
JournalPhysical Review D
Issue number7
StatePublished - 1979
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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