E2 M1 mixing ratio of Δ→Nγ and hyperon resonance radiative decay


Journal Article

We complete the leading contribution to the E2 M1 mixing ratio of the decay Δ→Nγ in heavy baryon chiral perturbation theory. We find the mixing ratio to be 4%{less-than or approximate}|δ E2 M1|{less-than or approximate}11%, much larger than estimates based on the quark model and other hadronic models. We also compute the mixing ratio for the radiative decay of the hyperon resonances. The decays {logical and with double overbar}*+→{logical and with double overbar}+γ and Ξ*-→Ξ-γ provide a particularly sensitive probe of deviations from heavy baryon spin-flavour SU(6). © 1993.

Full Text

Duke Authors

Cited Authors

  • Butler, MN; Savage, MJ; Springer, RP

Published Date

  • April 29, 1993

Published In

Volume / Issue

  • 304 / 3-4

Start / End Page

  • 353 - 358

International Standard Serial Number (ISSN)

  • 0370-2693

Digital Object Identifier (DOI)

  • 10.1016/0370-2693(93)90308-5

Citation Source

  • Scopus