DIQUARKS IN QCD WITH A LINEAR CONFINEMENT POTENTIAL

Citation
An. Ivanov et al., DIQUARKS IN QCD WITH A LINEAR CONFINEMENT POTENTIAL, Nuovo cimento della Società Italiana di Fisica. A. Nuclei, particles and fields, 108(5), 1995, pp. 613-621
Citations number
44
Categorie Soggetti
Physics, Particles & Fields
ISSN journal
11241861
Volume
108
Issue
5
Year of publication
1995
Pages
613 - 621
Database
ISI
SICI code
1124-1861(1995)108:5<613:DIQWAL>2.0.ZU;2-Z
Abstract
We explore the diquark-quark picture of the octet and the decuplet of low-lying baryons in QCD with a linear confinement potential. The mass spectra of scalar, pseudoscalar, vector and axial-vector diquarks, tr ansforming like (($) over tilde ($) under bar 3(f),($) over tilde ($) under bar 3(c))) and (6(f),($) over tilde ($) under bar 3(c)), are ana lysed. For scalar, pseudoscalar and vector diquarks we find bound stat es with masses M(s) similar or equal to M(p)=1.95 GeV, and M(V)=2.40 G eV, whereas for axial-vector diquarks no bound states exist. We conclu de that low-lying baryons cannot be described by the diquark-quark pic ture. Our results confirm the three-body structure of low-lying baryon s, and lead to an unambiguously fixed spinor structure of three-quark currents of low-lying baryons as proposed by Ioffe, Pascual and Tarrac h.