SU(6) [70,1-] baryon multiplet in the 1/N_c expansion

[en] The masses of excited states of mixed orbital symmetry of nonstrange and strange baryons belonging to the lowest $[{\bf 70},1^-]$ multiplet are calculated in the $1/N_c$ expansion to order $1/N_c$ with a new method which allows to considerably reduce the number of linearly independent operators entering the mass formula. This study represents an extension to SU(6) of our work on nonstrange baryons, the framework of which was SU(4). The conclusion regarding the role of the flavor operator, neglected in previous SU(6) studies, is reinforced. Namely, both the flavor and spin operators contribute dominantly to the flavor-spin breaking.

Disciplines :

Physics

Author, co-author :

Matagne, Nicolas; Université de Mons - UMONS > physics > physique nucléaire et subnucléaire

Stancu, Floarea ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)

Language :

English

Title :

SU(6) [70,1-] baryon multiplet in the 1/N_c expansion

Publication date :

07 March 2011

Journal title :

Physical Review. D, Particles and Fields

ISSN :

0556-2821

eISSN :

1089-4918

Publisher :

American Physical Society, College Park, United States - Maryland

Volume :

Pages :

056007

Peer reviewed :

Peer reviewed

Available on ORBi :

since 23 December 2012

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