Baryon Octet to Decuplet Electromagnetic Transitions

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dc.creatorLeinweber, Derek B.
dc.creatorDraper, Terrence
dc.creatorWoloshyn, R. M.
dc.date1992-12-13
dc.date.accessioned2026-07-07T11:34:36Z
dc.date.available2026-07-07T11:34:36Z
dc.descriptionThe 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 $N \; γ\to Δ$ channel is found to be in agreement with recent experimental analyses. The lattice results indicate $μ_{p Δ} / μ_p = 0.88(15)$. In terms of the Particle Data Group convention, $f_{M1} = 0.231(41)$ GeV${}^{-1/2}$ for $p \; γ\to Δ^+$ 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 $E2/M1$ multipole transition moment ratios are also determined. The lattice results suggest $R_{EM} \equiv -{\cal G}_{E2}/{\cal G}_{M1} = +3\pm 8$ \% for $p \; γ\to Δ^+$ transitions. Of particular interest are significant nonvanishing signals for the $E2/M1$ ratio in $Ξ^-$ and $Σ^-$ electromagnetic transitions.
dc.descriptionPostScript file, 37 pages including figures. U. MD PP #93-085, U. KY PP #UK/92-09, TRIUMF PP #TRI-PP-92-120
dc.identifierhttps://arxiv.org/abs/hep-lat/9212016
dc.identifierhttp://arxiv.org/abs/hep-lat/9212016
dc.identifierPhys.Rev.D48:2230-2249,1993
dc.identifierdoi:10.1103/PhysRevD.48.2230
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/198308
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.titleBaryon Octet to Decuplet Electromagnetic Transitions
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