We consider the Regge limit of a CFT correlation function of two vector and two scalar
operators, as appropriate to study small-x deep inelastic scattering in\(\mathcal {N}= 4\) SYM
or in QCD assuming approximate conformal symmetry. After clarifying the nature of the
Regge limit for a CFT correlator, we use its conformal partial wave expansion to obtain an
impact parameter representation encoding the exchange of a spin j Reggeon for any value
of the coupling constant. The CFT impact parameter space is the three-dimensional …

We consider the Regge limit of a CFT correlation function of two vector and two scalar
operators, as appropriate to study small-x deep inelastic scattering in SYM or in QCD
assuming approximate conformal symmetry. After clarifying the nature of the Regge limit for
a CFT correlator, we use its conformal partial wave expansion to obtain an impact parameter
representation encoding the exchange of a spin j Reggeon for any value of the coupling
constant. The CFT impact parameter space is the three-dimensional hyperbolic space H 3 …