Nucleon and hyperon electromagnetic transitions

Terrence Draper, Derek B. Leiweber, R. M. Woloshyn

Research output: Contribution to journalArticlepeer-review


The calculation of electromagnetic transition moments has been recognized as a powerful tool to help discriminate among models of hadronic structure. Here, SU(3)-flavor baryon octet-to-decuplet transition moments are examined within a quenched lattice QCD simulation. The pattern of flavor symmetry breaking for the transition moments is found to be more similar to that of decuplet than octet magnetic moments and suggests that the constituent quark model can better account for decuplet than octet structure. The lattice magnetic dipole transition moment for the Nλ → Δ channel is found to be in agreement with recent (model-dependent) experimental determinations. The lattice results indicate μp = 0.88(15) for pγ → Δ+. For the hyperon electromagnetic transitions, the significant nonvanishing signals for the E2/M1 ratio in Ξ - and ∑- electromagnetic transitions are of particular interest.

Original languageEnglish
Pages (from-to)427-430
Number of pages4
JournalNuclear Physics B - Proceedings Supplements
Issue numberC
StatePublished - Mar 1993

Bibliographical note

Funding Information:
This work is supported in part by the U.S. Department of Energy under grant numbers DE-FG05-84ER40154 and DE-FG05-87ER-40322, by the National Science Foundation under grant number STI-9108764 and by the Natural Sciences and Engineering Research Council of Canada.

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics


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