Comments on Baryons in Holographic QCD

Understand

We generalize the description of baryons as instantons of Sakai-Sugimoto model to the case where the flavor branes are non-anti-podal.

• The later corresponds to quarks with a "string endpoint mass".
• We show that the baryon vertex is located on the flavor branes and hence the generalized baryons also associate with instantons.
• We calculate the baryon mass spectra, the isoscalar and axial mean square radii, the isoscalar and isovector magnetic moments and the axial coupling as a function of the mass scale M_{KK} and the location \zeta of the tip of U-shaped flavor D8-branes.