Light-Front Holography and Gauge/Gravity Duality: The Light Meson and Baryon Spectra
Starting from the bound state Hamiltonian equation of motion in QCD, we derive relativistic light-front wave equations in terms of an invariant impact variable {zeta} which measures the separation of the quark and gluonic constituents within the hadron at equal light-front time. These equations of motion in physical space-time are equivalent to the equations of motion which describe the propagation of spin-J modes in anti-de Sitter (AdS) space. Its eigenvalues give the hadronic spectrum, and its eigenmodes represent the probability amplitudes of the hadronic constituents at a given scale. An effective classical gravity description in a positive-sign dilaton background exp(+{kappa}{sup 2}z{sup 2}) is given for the phenomenologically successful soft-wall model which naturally encodes the internal structure of hadrons and their orbital angular momentum. Applications to the light meson and baryon spectrum are presented.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 969274
- Report Number(s):
- SLAC-PUB-13779; arXiv:0909.3900; TRN: US1000238
- Resource Relation:
- Conference: Talk given at Light Cone 2009: Relativistic Hadronic and Particle Physics (LC 2009), Sao Jose dos Campos, Brazil, 8-13 Jul 2009
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
BARYONS
BOUND STATE
DUALITY
EIGENVALUES
EQUATIONS OF MOTION
HADRONS
HAMILTONIANS
HOLOGRAPHY
LIGHT CONE
MESONS
ORBITAL ANGULAR MOMENTUM
QUANTUM CHROMODYNAMICS
QUARKS
SPACE-TIME
SPECTRA
WAVE EQUATIONS
Phenomenology-HEP
HEPPH
HEPTH