Large Spin Systematics: Patterns from Reciprocity for Multiple Spinning Operators

TL;DR

This paper investigates the large spin behavior of conformal block expansions in scalar five-point correlators, deriving new constraints on OPE coefficients and revealing patterns that simplify their analysis.

Contribution

It introduces novel constraints on large spin OPE coefficients involving multiple spinning operators and identifies patterns that trivialize these constraints for zero spin cases.

Findings

Derived infinite constraints on large spin OPE coefficients.

Identified patterns that simplify the coefficients for zero spin.

Enhanced understanding of conformal correlator behavior in the large spin limit.

Abstract

We study the behaviour of the conformal block expansions of scalar fivepoint Lorentzian conformal correlators in the limit where multiple cross ratios approach zero. Since this limit is controlled by intermediate operators with large spin, we use it to study the large spin expansion of the OPE coefficients involving these operators. By imposing bootstrap assumptions such as analyticity of the correlators, we derive an infinite set of new constraints on the large spin behaviour of OPE coefficients involving multiple spinning operators. We also show that for the case of $l=0$, these constraints can be trivialised to all orders in $1/J$ by identifying a pattern in the coefficients.