Classification of Convergent OPE Channels for Lorentzian CFT Four-Point Functions

Understand

We analyze the convergence properties of operator product expansions (OPE) for Lorentzian CFT four-point functions of scalar operators.

• We give a complete classification of Lorentzian four-point configurations.
• All configurations in each class have the same OPE convergence properties in s-, t- and u-channels.
• We give tables including the information of OPE convergence for all classes.