Multiquark Correlations in Light Mesons and Baryons from holographic QCD

Journal Article · Fri Oct 21 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3647369· OSTI ID:21611899

Forkel, Hilmar ^[1]

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1. Institut fuer Physik, Humboldt-Universitaet zu Berlin, D-12489 Berlin (Germany)

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 bulk-mass 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 bulk-mass corrections are used to describe systematic good (i.e. maximally attractive) diquark effects. The baryon sizes are predicted to decrease with increasing good-diquark content, and the masses of all 48 observed light-quark baryon states are reproduced with unprecedented accuracy. Our approach further provides the first holographic description of a dominant tetraquark component in the lowest-lying scalar mesons. The tetraquark ground state emerges naturally as the lightest scalar nonet whereas higher excitations become heavier than their quark--antiquark counterparts and are thus likely to dissolve into the multiparticle continuum.

• OSTI ID: 21611899
• Journal Information: AIP Conference Proceedings, Vol. 1388, Issue 1; Conference: BARYONS' 10: International conference on the structure of baryons, Osaka (Japan), 7-11 Dec 2010; Other Information: DOI: 10.1063/1.3647369; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANOMALOUS DIMENSION
ANTI DE SITTER SPACE
BARYONS
CONFORMAL INVARIANCE
CORRECTIONS
CORRELATIONS
D QUARKS
EXCITATION
GRAVITATION
GROUND STATES
QUANTUM CHROMODYNAMICS
QUARK-ANTIQUARK INTERACTIONS
SCALAR MESONS
SCALARS
U QUARKS
BOSONS
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
FERMIONS
FIELD THEORIES
HADRONS
INTERACTIONS
INVARIANCE PRINCIPLES
MATHEMATICAL SPACE
MESONS
PARTICLE INTERACTIONS
QUANTUM FIELD THEORY
QUARKS
SCALE DIMENSION
SPACE