Applications of AdS/QCD and Light-Front Holography to Baryon Physics

Abstract

The correspondence between theories in anti-de Sitter space and field theories in physical space-time leads to an analytic, semiclassical model for strongly-coupled QCD which has scale invariance at short distances and color confinement at large distances. These equations, for both mesons and baryons, give a very good representation of the observed hadronic spectrum, including a zero mass pion. Light-front holography allows hadronic amplitudes in the AdS fifth dimension to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time, thus providing a relativistic description of hadrons at the amplitude level. The meson and baryon wavefunctions derived from light-front holography and AdS/QCD also have remarkable phenomenological features, including predictions for the electromagnetic form factors and decay constants. The approach can be systematically improved using light-front Hamiltonian methods. Some novel features of QCD for baryon physics are also discussed.

Presented by SJB at the International Conference on the Structure of Baryons, BARYONS'10, December 7-11, 2010, Osaka, Japan

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Cited by in corpus (8)

• Light-front quark model consistent with Drell-Yan-West duality and quark counting rules
• Nucleon structure including high Fock states in AdS/QCD
• Puzzles in Hadronic Physics and Novel Quantum Chromodynamics Phenomenology
• Nucleon structure in a light-front quark model consistent with quark counting rules and data
• Nucleon parton distributions in a light-front quark model
• Sub-leading twist transverse momentum dependent parton distributions in the light-front quark-diquark model
• Hadronic Form Factor Models and Spectroscopy Within the Gauge/Gravity Correspondence
• Novel Perspectives for Hadron Physics