Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-05-14
JHEP0707:077,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
33 pages, 5 figures, updated to the extended version published in JHEP, vector meson bulk potential and metric corrected, comm
Scientific paper
10.1088/1126-6708/2007/07/077
We consider a new approach towards constructing approximate holographic duals of QCD from experimental hadron properties. This framework allows us to derive a gravity dual which reproduces the empirically found linear square-mass trajectories of universal slope for radially and orbitally excited hadrons. Conformal symmetry breaking in the bulk is exclusively due to infrared deformations of the anti-de Sitter metric and governed by one free mass scale proportional to Lambda_QCD. The resulting background geometry exhibits dual signatures of confinement and provides the first examples of holographically generated linear trajectories in the baryon sector. The predictions for the light hadron spectrum include new relations between trajectory slopes and ground state masses and are in good overall agreement with experiment.
Beyer Michael
Forkel Hilmar
Frederico Tobias
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