Hadron spectroscopy and structure from AdS/CFT |
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Authors: | S J Brodsky |
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Institution: | (1) Stanford Linear Accelerator Center, Stanford University, 94309 Stanford, CA, USA |
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Abstract: | The AdS/CFT correspondence between conformal field theory and string states in an extended space-time has provided new insights
into not only hadron spectra, but also their light-front wave functions. We show that there is an exact correspondence between
the fifth-dimensional coordinate of anti-de Sitter space z and a specific impact variable ζ which measures the separation of the constituents within the hadron in ordinary space-time. This connection allows one to
predict the form of the light-front wave functions of mesons and baryons, the fundamental entities which encode hadron properties
and scattering amplitudes. A new relativistic Schr?dinger light-front equation is found which reproduces the results obtained
using the fifth-dimensional theory. Since they are complete and orthonormal, the AdS/CFT model wave functions can be used
as an initial ansatz for a variational treatment or as a basis for the diagonalization of the light-front QCD Hamiltonian.
A number of applications of light-front wave functions are also discussed. |
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Keywords: | 12 38 -t Quantum chromodynamics 11 25 Tq Gauge/string duality 12 38 Aw General properties of QCD (dynamics confinement etc )[ :AND:] 12 40 Nn Regge theory duality absorptive/optical models |
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