Towards 1/N corrections to deep inelastic scattering from the gauge/gravity duality

1/n 2 corrections to deep inelastic scattering (dis) of charged leptons from glueballs at strong coupling are investigated in the framework of the gauge/gravity duality. the structure functions f 1 and f 2 (and also f l ) are studied at subleading order in the 1/n 2 expansion, in terms of q 2 and the bjorken parameter x. the relevant type iib supergravity one-loop diagrams (which correspond to dis with two-hadron final states) are studied in detail, while n-loop diagrams (corresponding to dis with (n + 1)-hadron final states) are briefly discussed. the 1/n 2n and λ2 /q 2 dependence of the structure functions is analyzed. within this context two very different limits are considered: one is the large n limit and the other one is when the virtual photon momentum transfer q is much larger than the infrared confining scale λ. these limits do not commute.