Mesons and nucleons from holographic QCD in a unified approach

Abstract

We investigate masses and coupling constants of mesons and nucleons within a hard wall model of holographic QCD in a unified approach. We first examine an appropriate form of fermionic solutions by restricting the mass coupling for the five dimensional bulk fermions and bosons. We then derive approximated analytic solutions for the nucleons and the corresponding masses in a small mass coupling region. In order to treat meson and nucleon properties on the same footing, we introduce the same infrared (IR) cut in such a way that the meson-nucleon coupling constants, i.e., g_{pi NN} and g_{rho NN} are uniquely determined. The first order approximation with respect to a dimensionless expansion parameter, which is valid in the small mass coupling region, explicitly shows difficulties to avoid the IR scale problem of the hard wall model. We discuss possible ways of circumventing these problems.

15 pages, No figure. Several typos have been removed

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• 1/q^2 Corrections and Gauge/String Duality
• Baryons in AdS/QCD
• Dynamical Soft-Wall AdS/QCD
• Nucleon mass: from lattice QCD to the chiral limit
• The Soft-Wall Standard Model
• Perfecting the Ultra-violet of Holographic Descriptions of QCD
• Holographic Nuclear Matter in AdS/QCD
• Meson-Nucleon Coupling from AdS/QCD
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• Dimension Six Corrections to the Vector Sector of AdS/QCD Model
• Holographic QCD beyond the leading order

Cited by in corpus (6)

• Nucleon structure including high Fock states in AdS/QCD
• Nucleon resonances in AdS/QCD
• Mesons and Nucleons in Soft-Wall AdS/QCD
• Improving the Excited Nucleon Spectrum in Hard-Wall AdS/QCD
• Delocalized SYZ Mirrors and Confronting Top-Down $SU(3)$-Structure Holographic Meson Masses at Finite $g$ and $N_c$ with P(article) D(ata) G(roup) Values
• Electromagnetic transition form factors of nucleons from the hard-wall AdS/QCD model