Low-lying even-parity meson resonances and spin-flavor symmetry

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.016007· OSTI ID:21513058

Garcia-Recio, C; Geng, L S; Nieves, J; Salcedo, L L ^[1]

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1. Departamento de Fisica Atomica, Molecular y Nuclear, Universidad de Granada, E-18071 Granada (Spain)

Based on a spin-flavor extension of chiral symmetry, a novel s-wave meson-meson interaction involving members of the {rho} nonet and of the {pi} octet is introduced, and its predictions are analyzed. The starting point is the SU(6) version of the SU(3)-flavor Weinberg-Tomozawa Lagrangian. SU(6) symmetry-breaking terms are then included to account for the physical meson masses and decay constants in a way that preserves (broken) chiral symmetry. Next, the T-matrix amplitudes are obtained by solving the Bethe-Salpeter equation in a coupled-channel scheme, and the poles are identified with their possible Particle Data Group counterparts. It is shown that most of the low-lying even-parity Particle Data Group meson resonances, especially in the J{sup P}=0{sup +} and 1{sup +} sectors, can be classified according to multiplets of SU(6). The f{sub 0}(1500), f{sub 1}(1420), and some 0{sup +}(2{sup ++}) resonances cannot be accommodated within this scheme, and thus they would be clear candidates to be glueballs or hybrids. Finally, we predict the existence of five exotic resonances (I{>=}3/2 and/or |Y|=2) with masses in the range of 1.4-1.6 GeV, which would complete the 27{sub 1}, 10{sub 3}, and 10{sub 3}* multiplets of SU(3) x SU(2).

• OSTI ID: 21513058
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 1; Other Information: DOI: 10.1103/PhysRevD.83.016007; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BETHE-SALPETER EQUATION
CHIRAL SYMMETRY
COUPLED CHANNEL THEORY
EXOTIC RESONANCES
FLAVOR MODEL
GEV RANGE 01-10
GLUEBALLS
LAGRANGIAN FUNCTION
MESON-MESON INTERACTIONS
MESONS
PARITY
PARTICLE DECAY
S MATRIX
S WAVES
SPIN
SU-2 GROUPS
SU-3 GROUPS
SU-6 GROUPS
SYMMETRY BREAKING
ANGULAR MOMENTUM
BOSONS
COMPOSITE MODELS
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
EQUATIONS
FUNCTIONS
GEV RANGE
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
LIE GROUPS
MATHEMATICAL MODELS
MATRICES
PARTIAL WAVES
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
QUARK MODEL
RESONANCE PARTICLES
SU GROUPS
SYMMETRY
SYMMETRY GROUPS