Baryon Octet magnetic moments in $\chi$PT: More on the importance of the Decuplet

Abstract

We address the impact of treating the decuplet of spin-3/2 baryons as an explicit degree of freedom in the chiral expansion of the magnetic moments of the octet of spin-1/2 baryons. We carry out a complete calculation of the octet moments to O(1/\lamchic), including decuplet contributions to the chiral loops. In contrast to results of previous analyses, we find that inclusion of the decuplet preserves the convergence behavior of the chiral expansion implied by power counting arguments.

17 pages, 2 figures. Includes axodraw.sty needed for figures Minor typos corrected

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