Baryon octet to decuplet electromagnetic transitions

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

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

Abstract

The electromagnetic transition moments of the SU(3)-flavor baryon octet to decuplet are examined within a lattice simulation of quenched QCD. The magnetic transition moment for the N channel is found to be in agreement with recent experimental analyses. The lattice results indicate pp=0.88(15). In terms of the Particle Data Group convention, fM1=0.231(41) GeV- for p + transitions. Lattice predictions for the hyperon M1 transition moments agree with those of a simple quark model. However the manner in which the quarks contribute to the transition moments in the lattice simulation is different from that anticipated by quark model calculations. The scalar quadrupole form factor exhibits a behavior consistent with previous multipole analyses. The E2M1 multipole transition moment ratios are also determined. The lattice results suggest REM-GE2GM1=+38% for p + transitions. Of particular interest are significant nonvanishing signals for the E2M1 ratio in - and - electromagnetic transitions.

Original languageEnglish
Pages (from-to)2230-2249
Number of pages20
JournalPhysical review D
Volume48
Issue number5
DOIs
StatePublished - 1993

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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