Factorized lightcone expansion of conformal blocks

Understand

We present a factorized decomposition of 4-point scalar conformal blocks near the lightcone, which applies to arbitrary intermediate spin and general spacetime dimensions.

• Then we discuss the systematic expansion in large intermediate spin and the resummations of the large-spin tails of Regge trajectories.
• The basic integrals for the Lorentzian inversion are given by Wilson functions.