Artículo
Negative parity pentaquarks in large Nc QCD and quark model
Fecha de publicación:
12/2005
Editorial:
American Physical Society
Revista:
Physical Review D: Particles, Fields, Gravitation and Cosmology
ISSN:
1550-7998
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Recently, the 1/Nc expansion has been applied to the study of exotic baryons containing both quarks and antiquarks. We extend this approach to exotic states with mixed-symmetric spin-flavor symmetry, which correspond in the quark model to negative parity pentaquarks, and discuss the large N c predictions for their mass spectrum. The heavy exotics Q̄q4 transform as 3, 6, 15 and 15′ under SU(3), while the light states q̄q4 include the exotic multiplets 10, 27, 35. We give mass relations among these multiplets in the 1/Nc expansion. In the quark model, the mass splittings between these states are given by color-spin interactions. Using the observation of an anticharmed exotic by the H1 Collaboration, we give predictions for the masses of other expected heavy pentaquarks. © 2005 The American Physical Society.
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IFIBA)
Articulos de INST.DE FISICA DE BUENOS AIRES
Articulos de INST.DE FISICA DE BUENOS AIRES
Citación
Pirjol, Dan; Schat, Carlos Luis; Negative parity pentaquarks in large Nc QCD and quark model; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; 71; 3; 12-2005; 360041-3600415
Compartir
Altmétricas