Baryons in holographic QCD
Abstract
We study baryons in holographic QCD with D4/D8/D8 multiDbrane system. In holographic QCD, the baryon appears as a topologically nontrivial chiral soliton in a fourdimensional effective theory of mesons. We call this topological soliton braneinduced Skyrmion. Some review of D4/D8/D8 holographic QCD is presented from the viewpoints of recent hadron physics and QCD phenomenologies. A fourdimensional effective theory with pions and {rho} mesons is uniquely derived from the nonAbelian DiracBornInfeld (DBI) action of D8 brane with D4 supergravity background at the leading order of large N{sub c}, without small amplitude expansion of meson fields to discuss chiral solitons. For the hedgehog configuration of pion and {rho}meson fields, we derive the energy functional and the EulerLagrange equation of braneinduced Skyrmion from the meson effective action induced by holographic QCD. Performing the numerical calculation, we obtain the soliton solution and figure out the pion profile F(r) and the {rho}meson profile Gtilde(r) of the braneinduced Skyrmion with its total energy, energy density distribution, and rootmeansquare radius. These results are compared with the experimental quantities of baryons and also with the profiles of standard Skyrmion without {rho} mesons. We analyze interaction terms of pions and {rho} mesons in braneinduced Skyrmion, and find a significantmore »
 Authors:
 Department of Physics, Kyoto University, Kyoto 6068502 (Japan)
 Publication Date:
 OSTI Identifier:
 21020436
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 8; Other Information: DOI: 10.1103/PhysRevD.75.086003; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACTION INTEGRAL; AMPLITUDES; BARYONS; BORNINFELD THEORY; BRANES; CHIRALITY; DISTRIBUTION; ENERGY DENSITY; FOURDIMENSIONAL CALCULATIONS; HOLOGRAPHY; LAGRANGE EQUATIONS; MATHEMATICAL SOLUTIONS; PIONS; QUANTUM CHROMODYNAMICS; SOLITONS; SUPERGRAVITY; TOPOLOGY
Citation Formats
Nawa, Kanabu, Suganuma, Hideo, and Kojo, Toru. Baryons in holographic QCD. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVD.75.086003.
Nawa, Kanabu, Suganuma, Hideo, & Kojo, Toru. Baryons in holographic QCD. United States. doi:10.1103/PHYSREVD.75.086003.
Nawa, Kanabu, Suganuma, Hideo, and Kojo, Toru. Sun .
"Baryons in holographic QCD". United States.
doi:10.1103/PHYSREVD.75.086003.
@article{osti_21020436,
title = {Baryons in holographic QCD},
author = {Nawa, Kanabu and Suganuma, Hideo and Kojo, Toru},
abstractNote = {We study baryons in holographic QCD with D4/D8/D8 multiDbrane system. In holographic QCD, the baryon appears as a topologically nontrivial chiral soliton in a fourdimensional effective theory of mesons. We call this topological soliton braneinduced Skyrmion. Some review of D4/D8/D8 holographic QCD is presented from the viewpoints of recent hadron physics and QCD phenomenologies. A fourdimensional effective theory with pions and {rho} mesons is uniquely derived from the nonAbelian DiracBornInfeld (DBI) action of D8 brane with D4 supergravity background at the leading order of large N{sub c}, without small amplitude expansion of meson fields to discuss chiral solitons. For the hedgehog configuration of pion and {rho}meson fields, we derive the energy functional and the EulerLagrange equation of braneinduced Skyrmion from the meson effective action induced by holographic QCD. Performing the numerical calculation, we obtain the soliton solution and figure out the pion profile F(r) and the {rho}meson profile Gtilde(r) of the braneinduced Skyrmion with its total energy, energy density distribution, and rootmeansquare radius. These results are compared with the experimental quantities of baryons and also with the profiles of standard Skyrmion without {rho} mesons. We analyze interaction terms of pions and {rho} mesons in braneinduced Skyrmion, and find a significant {rho}meson component appearing in the core region of a baryon.},
doi = {10.1103/PHYSREVD.75.086003},
journal = {Physical Review. D, Particles Fields},
number = 8,
volume = 75,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}

A hadron's multiquark content reflects itself in the quark composition of the interpolator with which it has maximal overlap. The AdS/CFT dictionary translates the anomalous dimension of this interpolator into a mass correction for the corresponding dual mode. Hence such bulkmass corrections can carry specific information on multiquark correlations. Two prominent examples are studied by implementing this robust and universal holographic mechanism into AdS/QCD gravity duals. In the baryon sector bulkmass corrections are used to describe systematic good (i.e. maximally attractive) diquark effects. The baryon sizes are predicted to decrease with increasing gooddiquark content, and the masses of all 48more »

Precision Holographic Baryons
We overview a holographic QCD based on the D4D8 string theory model, with emphasis on baryons and nucleonmeson interactions thereof. Baryons are realized as holographic images of Skyrmions, but with much qualitative changes. This allows us to derive, without adjustable parameters, couplings of baryons to the entire tower of spin one mesons and also to pseudoscalar mesons. We find some surprisingly good match against empirical values for nucleons, in particular. Tensor couplings to all axialvectors and isosinglet vectors all vanish, while, for {rho} mesons, tensor couplings are found to be dominant. We close with various cautionary comments and speculations. 
Heavy and strange holographic baryons
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