We study probe flavor branes supersymmetrically embedded in the Klebanov-Strassler background. The embedding is controlled by a single complex parameter ? related to the quark mass. We study the spectrum of the vector mesons as a function of ? and compare it with the experimental data. Assuming that the ρ(2150) meson is a 3 3S1 mode we find a remarkable agreement with the masses of the lightest excited ρ-mesons. Also, for a certain range of parameters our model exhibits an unusual behavior. The mesons built of the lighter quarks become more heavy than the ones built of the heavier quarks. We comment on a possible connection this phenomenon may have with the masses of the putative pure strange-anti strange mesons.
- AdS-CFT correspondence