Multiquark picture for (1620)
Special Research Centre for the Subatomic Structure of Matter, University of Adelaide,
Adelaide, SA 5005, Australia
Received: 7 September 1998 / Revised version: 5 January 2000 Communicated by W. Weise
In this work we report on a new QCD sum rule analysis to predict masses of the excited baryon states (e.g. (1620) and (1405)) by using multiquark interpolating fields ( ). For the (1620) we consider the , , and (I=1) multiquark interpolating fields. The calculated mass from those multiquark states is about 1.592 GeV. For the (1405) we first show the result using the (I=0) multiquark interpolating field, and compare the calculated mass to that of our previous result using the multiquark state. We then show that the mass 1.405 GeV is well reproduced when using the (I=0) multiquark state. The uncertainties in our sum rules are also discussed.
Copyright Società Italiana di Fisica, Springer-Verlag 2000