Chiral symmetry breaking in the soft-wall AdS/QCD model

Journal Article · Wed Apr 01 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.076003· OSTI ID:21308219

Gherghetta, Tony ^[1]; Kapusta, Joseph I; Kelley, Thomas M ^[2]

---

1. School of Physics, University of Melbourne, Victoria 3010 (Australia)
2. School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)

We show how to incorporate chiral-symmetry breaking in the soft-wall version of the anti-de Sitter/QCD model by using a modified dilaton profile and a quartic term in the bulk scalar potential. This allows one to separate the dependence on spontaneous and explicit chiral-symmetry breaking. Moreover, our 5D model automatically incorporates linear trajectories and non chiral-symmetry restoration for highly excited radial states. We compare our resulting mass spectra in the scalar, vector, and axial-vector sectors with the respective QCD resonances and find reasonable agreement using the known values for the pion mass and decay constant.

• OSTI ID: 21308219
• Journal Information: Physical Review. D, Particles Fields, Vol. 79, Issue 7; Other Information: DOI: 10.1103/PhysRevD.79.076003; (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
ANTI DE SITTER SPACE
CHIRAL SYMMETRY
COMPARATIVE EVALUATIONS
MASS
MASS SPECTRA
PARTICLE DECAY
PIONS
POTENTIALS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
RESONANCE
STRING MODELS
SYMMETRY BREAKING