MORIMATSU, O and TAKIZAWA, M (1993) EFFECTS OF THE UA(1) BREAKING INTERACTION ON BARYONIC SYSTEMS. NUCLEAR PHYSICS A, 554 (4). pp. 635-652. ISSN 0375-9474,
Full text not available from this repository.Abstract
The effects of the U(A)(1) breaking interaction on the baryon number one and two systems are estimated employing the six-quark flavour determinantal interaction as the effective interaction of quarks which reproduces the observed mass difference of eta and eta' mesons. This is done by calculating the matrix elements of the U(A)(1) breaking hamiltonian with respect to unperturbed states of the MIT bag model and the nonrelativistic quark model. The determinantal interaction induces not only three-body but also two-body interactions of valence quarks. The two-body interaction is attractive, which gives rise to the NDELTA mass difference with the magnitude less than one tenth of the observed one and attraction of two octet baryons at short distances whose magnitude is in the range 20 approximately 80 MeV depending on the flavour channels and the choice of parameters. The three-body interaction is repulsive, which gives about 10 approximately 20 MeV repulsion in the H-dibaryon channel and somewhat weaker repulsion in the flavour SU(3) octet and antidecuplet channels of two octet baryons at short distances. We also compare our results with those obtained by using the instanton-induced interaction.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | JONA-LASINIO MODEL; U(1) PROBLEM; INSTANTONS; MESONS; QUARKS; MASSES; |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:42 |
| URI: | https://pred.uni-regensburg.de/id/eprint/54053 |
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