Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2003-02-13
Phys.Lett.B563:157-164,2003
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 7 figures, RevTex 4; Updated to include a recent experimental result
Scientific paper
10.1016/S0370-2693(03)00418-0
Theoretical predictions for the magnetic moments of the physical Delta baryons are extracted from lattice QCD calculations. We utilize finite-range regulated effective field theory that is constructed to have the correct Dirac moment mass dependence in the region where the up and down quark masses are heavy. Of particular interest is the chiral nonanalytic behaviour encountered as the nucleon-pion decay channel opens. We find a Delta^++ magnetic moment (at the Delta pole) of 4.99 \pm 0.56 \mu_N. This result is within the Particle Data Group range of 3.7-7.5 \mu_N and compares well with the experimental result of Bosshard et al. of 4.52 \pm 0.51 \pm 0.45 \mu_N. The interplay between the different pion-loop contributions to the Delta^+ magnetic moment leads to the surprising result that the proton moment may exceed that of the Delta^+, contrary to conventional expectations.
Cloët Ian C.
Leinweber Derek B. .
Thomas Anthony W.
No associations
LandOfFree
Delta Baryon Magnetic Moments From Lattice QCD 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 Delta Baryon Magnetic Moments From Lattice QCD, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Delta Baryon Magnetic Moments From Lattice QCD will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-332991