Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1992-12-13
Phys.Rev.D48:2230-2249,1993
Physics
High Energy Physics
High Energy Physics - Lattice
PostScript file, 37 pages including figures. U. MD PP #93-085, U. KY PP #UK/92-09, TRIUMF PP #TRI-PP-92-120
Scientific paper
10.1103/PhysRevD.48.2230
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 $N \; \gamma \to \Delta$ channel is found to be in agreement with recent experimental analyses. The lattice results indicate $\mu_{p \Delta} / \mu_p = 0.88(15)$. In terms of the Particle Data Group convention, $f_{M1} = 0.231(41)$ GeV${}^{-1/2}$ for $p \; \gamma \to \Delta^+$ 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 $p \; \gamma \to \Delta^+$ transitions. Of particular interest are significant nonvanishing signals for the $E2/M1$ ratio in $\Xi^-$ and $\Sigma^-$ electromagnetic transitions.
Draper Terrence
Leinweber Derek B. .
Woloshyn Richard M.
No associations
LandOfFree
Baryon Octet to Decuplet Electromagnetic Transitions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Baryon Octet to Decuplet Electromagnetic Transitions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Baryon Octet to Decuplet Electromagnetic Transitions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-722188