Baryons in holographic QCD

by Deog Ki Hong (Pusan National University)

Thursday 25 Oct 2007, 14:00 → 15:00 Europe/Zurich

TH Theory Conference Room (CERN)

We study the baryons in holographic QCD, where baryons are realized as instanton solitons. The solitons are shown to be very small in the large 't Hooft coupling limit, allowing us to introduce effective fields to represent them. The effective action of baryons is dictated by the soliton structure, and consists of a direct magnetic coupling to the 5D SU(Nf) field strength as well as a minimal coupling to the 5D U(Nf) gauge fields. From the effective action we calculate the couplings of the baryons to the mesons and show that the electromagnetic interactions of baryons are mediated by an infinite tower of vector mesons. We also derive new sum rules for the anomalous magnetic moments and also for the electric dipole moments of baryons.