Abstract:
In this work we report on a new QCD sum rule analysis to predict masses of the excited baryon states (e.g. Σ (1620) and Λ (1405)) by using multiquark interpolating fields ((q¯q)(qqq)). For the Σ (1620) we consider the ¯KN, πΣ, and πΛ (I = 1) multiquark interpolating fields. The calculated mass from those multiquark states is about 1.592 GeV. For the Λ (1405) we first show the result using the π+Σ−+π0Σ0+π−Σ+ (I = 0) multiquark interpolating field, and compare the calculated mass to that of our previous result using the π0Σ0 multiquark state. We then show that the mass 1.405 GeV is well reproduced when using the ¯KN (I = 0) multiquark state. The uncertainties in our sum rules are also discussed.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 7 September 1998 / Revised version: 5 January 2000
Rights and permissions
About this article
Cite this article
Choe, S. Multiquark picture for Σ (1620) . EPJ A 7, 441–448 (2000). https://doi.org/10.1007/PL00013636
Issue Date:
DOI: https://doi.org/10.1007/PL00013636