MAGNETIC-MOMENTS OF DELTA(-) FROM QCD SUM-RULES(+) AND OMEGA()

Authors
Citation
Fx. Lee, MAGNETIC-MOMENTS OF DELTA(-) FROM QCD SUM-RULES(+) AND OMEGA(), Physics letters. Section B, 419(1-4), 1998, pp. 14-18
Citations number
22
Categorie Soggetti
Physics
Journal title
ISSN journal
03702693
Volume
419
Issue
1-4
Year of publication
1998
Pages
14 - 18
Database
ISI
SICI code
0370-2693(1998)419:1-4<14:MODFQS>2.0.ZU;2-Q
Abstract
QCD sum rules for the magnetic moments of Delta(++) and Omega(-) are d erived using the external field method. They are analyzed by a Monte C arlo based procedure, using realistic estimates of the QCD input param eters. The results are consistent with the measured values, despite re latively large errors that can be attributed mostly to the poorly-know n vacuum susceptibility chi. It is shown that a 30% level accuracy can be achieved in the derived sum rules, provided the QCD input paramete rs are improved to the 10% level. (C) 1998 Elsevier Science B.V.