Electromagnetic properties of the baryon decuplet in quenched and partially quenched chiral perturbation theory
Abstract
We calculate the electromagnetic properties of the decuplet baryons in quenched and partially quenched chiral perturbation theory. We work at nexttoleading order in the chiral expansion, leading order in the heavy baryon expansion, and obtain expressions for the magnetic moments, charge radii, and electric quadrupole moments. The quenched calculation is shown to be pathological since only quenched chiral singularities are present at this order. We present the partially quenched results for both the SU(2) and SU(3) flavor groups and use the isospin limit in the latter. These results are necessary for proper extrapolation of lattice calculations of decuplet electromagnetic properties.
 Publication:

Physical Review D
 Pub Date:
 December 2003
 DOI:
 10.1103/PhysRevD.68.114503
 arXiv:
 arXiv:heplat/0308001
 Bibcode:
 2003PhRvD..68k4503A
 Keywords:

 12.38.Gc;
 Lattice QCD calculations;
 High Energy Physics  Lattice;
 High Energy Physics  Phenomenology;
 Nuclear Theory
 EPrint:
 17 pages, 3 eps figures, RevTex4