Published January 1, 2004 | Version v1
Journal article Metadata-only

Ground-state scalar q-barq nonet: SU(3) mass splittings and strong, electromagnetic, and weak decay rates

Creators

  • 1. Departamento de Fisica, Universidade de Coimbra, P-3004-516 Coimbra (Portugal)
  • 2. Centro de Fisica das Interacco(tilde sign)es Fundamentais, Instituto Superior Tecnico, P-1049-001 Lisbon (Portugal)
  • 3. Physics Department, University of Arizona, Tucson, Arizona 85721 (United States)

Description

By comparing SU(3)-breaking scales of linear mass formulas, it is shown that the lowest vector and scalar mesons all have a q-barq configuration, while the ground-state octet and decuplet baryons are qqq. Also, the quark-level linear σ model is employed to predict similar q-barq and qqq states. Furthermore, the approximate mass degeneracy of the scalar a0(985) and f0(980) mesons is demonstrated to be accidental. Finally, it is shown that various strong, electromagnetic, and weak mesonic decay rates are successfully explained within the framework of the quark-level linear σ model

Additional details

Identifiers

DOI
10.1103/PhysRevD.69.014010;
arXiv
arXiv:hep-ph/0309109v1;

Publishing Information

Journal Title
Physical Review. D, Particles Fields
Journal Volume
69
Journal Issue
1
Journal Page Range
p. 014010-014010.9
ISSN
0556-2821
CODEN
PRVDAQ

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
35082543
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
A0-980 MESONS; BARYONS; F0-980 MESONS; GROUND STATES; HADRONIC PARTICLE DECAY; MASS FORMULAE; QUARK MODEL; QUARKS; REST MASS; SIGMA MODEL; SU-3 GROUPS; SYMMETRY BREAKING; VECTOR MESONS
Descriptors DEC
BOSON-EXCHANGE MODELS; BOSONS; COMPOSITE MODELS; DECAY; ELEMENTARY PARTICLES; ENERGY LEVELS; FERMIONS; HADRONS; LIE GROUPS; MASS; MATHEMATICAL MODELS; MESONS; PARTICLE DECAY; PARTICLE MODELS; PERIPHERAL MODELS; SCALAR MESONS; SU GROUPS; SYMMETRY GROUPS

Optional Information

Notes
(c) 2004 The American Physical Society