Diquark correlations in baryon spectroscopy and holographic QCD

Understand

We introduce an improved mass formula for the nucleon and delta resonances and show how it emerges from AdS/QCD in a straightforward extension of the 'metric soft wall' gravity dual.

• The resulting spectrum depends on just one adjustable parameter, characterizing confinement-induced IR deformations of the anti-de Sitter (AdS) metric, and on the fraction of 'good' (i.e.
• maximally attractive) diquarks in the baryon's quark model wave function.
• Despite its simplicity, the predicted spectrum describes the masses of all 48 observed light-quark baryon states and their linear trajectory structure with unprecedented accuracy.