An orientifold of AdS5 x T11 with D7-branes, the associated α′2-corrections and their role in the dual N=1Sp(2N+2M) x Sp(2N) gauge theory -: art. no. 012

We study the N = 1 Sp(2 N + 2 M) x Sp(2N) gauge theory on a stack of N physical and M fractional D3-branes in the background of an orientifolded conifold. The gravity dual is a type-IIB orientifold of AdS(5) x T-11 (with certain background fluxes turned on) containing an O7-plane and 8 D7-branes. In the conformal case (M = 0), we argue that the alpha'(2)-terms localized on the 8 D7-branes and the O7-plane should give vanishing contributions to the supergravity equations of motion for the bulk fields. In the cascading case M not equal 0), we argue that the alpha'(2)-terms give rise to corrections which in the dual Sp(2 N + M) x Sp(2 N) gauge theory can be interpreted as corrections to the anomalous dimensions of the matter fields.