Light baryon masses in different large-Nc limits

[en] We investigate the behavior of light baryon masses in three inequivalent large-Nc limits: 't Hooft, QCDAS and Corrigan-Ramond. Our framework is a constituent quark model with relativistictype kinetic energy, stringlike confinement, and one-gluon-exchange term, thus leading to well-defined results even for massless quarks. We analytically prove that the light baryon masses scale as Nc, Nc^2 , and 1 in the 't Hooft, QCDAS and Corrigan-Ramond limits, respectively. Those results confirm previous ones obtained by using either diagrammatic methods or constituent approaches, mostly valid for heavy quarks.

Research center :

AGIF - Algèbre, Géométrie et Interactions fondamentales

Disciplines :

Physics

Author, co-author :

Buisseret, Fabien ; Université de Mons > Faculté des Sciences > FS - Service du Doyen ; Université de Mons > Faculté des Sciences > Physique nucléaire et subnucléaire

Semay, Claude ; Université de Mons > Faculté des Sciences > Physique nucléaire et subnucléaire

Language :

English

Title :

Light baryon masses in different large-Nc limits

Publication date :

20 September 2010

Journal title :

Physical Review. D, Particles and Fields

ISSN :

0556-2821

Publisher :

American Physical Society, Lancaster, Panama

Volume :

Pages :

056008 (7 p.)

Peer reviewed :

Peer reviewed

Research unit :

S824 - Physique nucléaire et subnucléaire

Research institute :

R150 - Institut de Recherche sur les Systèmes Complexes

Available on ORBi UMONS :

since 20 December 2010

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