Baryons from instantons in holographic QCD

Details Baryons from instantons in holographic QCD Baryons from instantons in holographic QCD

2007-01-30

arxiv.org/abs/hep-th/0701280v3

Prog.Theor.Phys.117:1157,2007

Physics

High Energy Physics

High Energy Physics - Theory

25 pages, v2: references added, minor changes, v3: PTP-style, minor corrections

Scientific paper

10.1143/PTP.117.1157

We consider aspects of dynamical baryons in a holographic dual of QCD that is proposed on the basis of a D4/D8-brane configuration. We construct a soliton solution carrying a unit baryon number and show that it is given by an instanton solution of four-dimensional Yang-Mills theory with fixed size. The Chern-Simons term on the flavor D8-branes plays a crucial role of protecting the instanton from collapsing to zero size. By quantizing the collective coordinates of the soliton, we work out the baryon spectra. Negative-parity baryons as well as baryons with higher spins and isospins can be obtained in a simple manner.

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