Meson spectroscopy in AdS/CFT with flavour

We compute the meson spectrum of an N = 2 super Yang-Mills theory with fundamental matter from its dual string theory on AdS(5) X S-5 with a D7-brane probe [1]. For scalar and vector mesons with arbitrary R-charge the spectrum is computed in closed form by solving the equations for D7-brane fluctuations; for matter with non-zero mass m(q) it is discrete, exhibits a mass gap of order m(q)/root(g(s)N) over bar and furnishes representations of SO(5) even though the manifest global symmetry of the theory is only SO(4). The spectrum of mesons with large spin J is obtained from semiclassical, rotating open strings attached to the D7-brane. It displays Regge-like behaviour for J much less than root(g(s)N) over bar, whereas for J much greater than root(g(s)N) over bar it corresponds to that of two non-relativistic quarks bound by a Coulomb potential. Meson interactions, baryons and 'giant gauge bosons' are briefly discussed.