Boundary Operators of BCFW Recursion Relation

TL;DR

This paper interprets boundary contributions in BCFW recursion as form factors of boundary operators, providing an algorithm to compute these operators via operator product expansion and path integrals.

Contribution

It introduces the concept of boundary operators in BCFW recursion and offers a method to compute them using operator product expansion and path integrals.

Findings

Boundary contributions correspond to form factors of boundary operators.

Boundary operators can be extracted from operator product expansion.

An algorithm for computing boundary operators using path integral is presented.

Abstract

We show that boundary contributions of BCFW recursions can be interpreted as the form factors of some composite operators which we call 'boundary operators'. The boundary operators can be extracted from the operator product expansion of deformed fields. We also present an algorithm to compute the boundary operators using path integral.