s-wave charmed baryon resonances from a coupled-channel approach with heavy quark symmetry

Journal Article · Sun Mar 01 00:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.054004· OSTI ID:21266346

Garcia-Recio, C; Salcedo, L L ^[1]; Magas, V K; Ramos, A ^[2]; Mizutani, T ^[3]; Nieves, J ^[4]; Tolos, L ^[5]

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1. Departamento de Fisica Atomica, Molecular y Nuclear, Universidad de Granada, E-18071 Granada (Spain)
2. Departament d'Esctructura i Constituents de la Materia and Institut de Ciencies del Cosmos, Universitat de Barcelona, E-08028 Barcelona (Spain)
3. Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061 (United States)
4. Instituto de Fisica Corpuscular (centro mixto CSIC-UV), Institutos de Investigacion de Paterna, Aptdo. 22085, 46071, Valencia (Spain)
5. Frankfurt Institute for Advanced Studies, Goethe-Universitaet, 60438 Frankfurt am Main (Germany)

We study charmed baryon resonances that are generated dynamically within a unitary meson-baryon coupled-channel model that treats the heavy pseudoscalar and vector mesons on equal footing as required by heavy-quark symmetry. It is an extension of recent SU(4) models with t-channel vector-meson exchanges to an SU(8) spin-flavor scheme, but differs considerably from the SU(4) approach in how the strong breaking of the flavor symmetry is implemented. Some of our dynamically generated states can be readily assigned to recently observed baryon resonances, while others do not have a straightforward identification and require the compilation of more data as well as an extension of the model to d-wave meson-baryon interactions and p-wave coupling in the neglected s- and u-channel diagrams. Of several novelties, we find that the {lambda}{sub c}(2595), which emerged as a ND quasibound state within the SU(4) approaches, becomes predominantly a ND* quasibound state in the present SU(8) scheme.

• OSTI ID: 21266346
• Journal Information: Physical Review. D, Particles Fields, Vol. 79, Issue 5; Other Information: DOI: 10.1103/PhysRevD.79.054004; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
C QUARKS
CHARMED BARYONS
COUPLED CHANNEL THEORY
COUPLING
D WAVES
FLAVOR MODEL
MESON-BARYON INTERACTIONS
P WAVES
RESONANCE PARTICLES
S WAVES
SPIN
SU-4 GROUPS
SU-8 GROUPS
SYMMETRY
SYMMETRY BREAKING
T CHANNEL
T QUARKS
U CHANNEL
VECTOR MESONS