Precision Electromagnetic Structure of Octet Baryons in the Chiral Regime

Details Precision Electromagnetic Structure of Octet Baryons in the Chiral Regime Precision Electromagnetic Structure of Octet Baryons in the Chiral Regime

2006-04-27

arxiv.org/abs/hep-lat/0604022v1

Phys.Rev.D74:093005,2006

Physics

High Energy Physics

High Energy Physics - Lattice

29 pages, 33 figures, 20 tables

Scientific paper

10.1103/PhysRevD.74.093005

The electromagnetic properties of the baryon octet are calculated in quenched QCD on a 20^3 x 40 lattice with a lattice spacing of 0.128 fm using the fat-link irrelevant clover (FLIC) fermion action. FLIC fermions enable simulations to be performed efficiently at quark masses as low as 300 MeV. By combining FLIC fermions with an improved-conserved vector current, we ensure that discretisation errors occur only at O(a^2) while maintaining current conservation. Magnetic moments and electric and magnetic radii are extracted from the electric and magnetic form factors for each individual quark sector. From these, the corresponding baryon properties are constructed. Our results are compared extensively with the predictions of quenched chiral perturbation theory. We detect substantial curvature and environment sensitivity of the quark contributions to electric charge radii and magnetic moments in the low quark mass region. Furthermore, our quenched QCD simulation results are in accord with the leading non-analytic behaviour of quenched chiral perturbation theory, suggesting that the sum of higher-order terms makes only a small contribution to chiral curvature.

Affiliated with

Also associated with

No associations

Rating

Precision Electromagnetic Structure of Octet Baryons in the Chiral Regime 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 Precision Electromagnetic Structure of Octet Baryons in the Chiral Regime, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Precision Electromagnetic Structure of Octet Baryons in the Chiral Regime will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-20737