Determination of decuplet baryon magnetic moments from QCD sum rules
- Nuclear Physics Laboratory, Department of Physics, University of Colorado, Boulder, Colorado 80309-0446 (United States)
A complete set of QCD sum rules for the magnetic moments of decuplet baryons are derived using the external field method. They are analyzed thoroughly using a Monte Carlo based procedure. Valid sum rules are identified under the criteria of OPE convergence and ground state dominance and their predictions are obtained. The performances of these sum rules are further compared and a favorable sum rule is designated for each member. Correlations between the input and the output parameters are examined and large sensitivities to the quark condensate magnetic susceptibility {chi} are found. Using realistic estimates of the QCD input parameters, the uncertainties on the magnetic moments are found relatively large and they can be attributed mostly to the poorly known {chi}. It is shown that the accuracy can be improved to the 30{percent} level, provided the uncertainties in the QCD input parameters can be determined to the 10{percent} level. The computed magnetic moments are consistent with existing data. Comparisons with other calculations are made. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 567131
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 3 Vol. 57; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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