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HK: Hadronen und Kerne

HK 10: Structure of Baryons, Mesons I, Crystal Barrel Results

HK 10.10: Talk

Monday, March 16, 1998, 16:15–16:30, H

Charmed baryons in a constituent quark model with flavour dependent or independent exchange interaction — •P. Stassart and Fl. Stancu — Université de Liège, Institut de Physique B.5, Sart Tilman, B-4000 Liège 1, Belgium

The recent chiral constituent quark model of Glozman and Riska [1] successfully describes the light and strange baryon spectra, including a correct order of low-lying positive and negative parity states [2]. A schematic description of charm- and b-baryons has also been given [3]. As the experimental measurements are in steady progress in the charm-sector [4] data should be soon sufficient for making a proper comparison with theoretical predictions. Here we study a semi-relativistic extension of the model [1] in the context of heavy baryons. Besides the meson exchange mechanism, advocated by [1] we also discuss the contribution of the one-gluon exchange interaction, in order to reveal the role of the short range dynamics.

[1] L.Ya. Glozman and D.O. Riska, Phys.Rep. 268, 263 (1996)

[2] L.Ya. Glozman, Z. Papp and W. Plessas, Phys.Lett. B381, 311 (1996) ; L.Ya. Glozman, W. Plessas, K. Varga and R.F. Wagenbrunn, hep-ph/9706507

[3] L.Ya. Glozman and D.O. Riska, Nucl.Phys. A603, 326 (1996)

[4] S.C. Timm et al (CLEO collaboration),
contribution to Hadron ’97 Conference, August 25-29, 1997, BNL, U.S.A.