Is QCD at small x a string theory?

Abstract

Using the dipole picture describing the $1/N_C$ limit of QCD at small $x$ and the conformal invariance properties of the BFKL kernel in transverse coordinate space, we show that the 1->p dipole densities can be expressed in terms of dual Shapiro-Virasoro amplitudes B_{2p+2} and their generalization including non-zero conformal spins. We discuss the possibility of an effective closed string theory of interacting QCD dipoles.

Comments: 8 pages, no figures, LaTeX. Proceedings of the Madrid low-x workshop on deep inelastic scattering held at Miraflores de la Sierra, June 18-21, 1997 (shortened mixture of hep-ph/9704342 and PLB 409 (1997) 491)