| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1547789 | Physica E: Low-dimensional Systems and Nanostructures | 2007 | 4 Pages |
Abstract
Mixing of multi-quark components in the non-singlet scalar mesons and the flavor singlet Î(1405) baryon with negative parity are studied in the QCD sum rule. We propose a formulation to evaluate cross-correlators of qq¯(qqq) and qqq¯q¯(qqqqq¯) operators and to define mixing of different Fock states in the sum rule. It is applied to the non-singlet scalar mesons and Î(1405) baryon. We find that the multi-quark operators predict lower masses than the qq¯(qqq) operators and that the multi-quark states are dominant in the lowest mass states.
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Materials Science
Electronic, Optical and Magnetic Materials
Authors
T. Nakamura, J. Sugiyama, N. Ishii, T. Nishikawa, M. Oka,