# Maximal-Helicity-Violating Scattering of Gluons and Gravitons in Chiral Strong Fields.

Mason, L
Sharma, A

1 July 2020

## Journal:

Physical review letters

## Last Updated:

2020-11-10T10:16:50.94+00:00

4

125

## DOI:

10.1103/physrevlett.125.041602

041602-

## abstract:

We present all-multiplicity formulas for the tree-level scattering of gluons and gravitons in the maximal helicity violating (MHV) helicity configuration, calculated in certain chiral strong fields. The strong backgrounds we consider are self-dual plane waves in gauge theory and general relativity, which are treated exactly and admit a well-defined S matrix. The gauge theory background-coupled MHV amplitude is simply a dressed analog of the familiar Parke-Taylor formula, but the gravitational version has nontrivial new structures due to graviton tails. Both formulas have just one residual integral rather than the n-2 expected at n points from space-time perturbation theory; this simplification arises from the integrability of self-dual backgrounds and their corresponding twistor description. The resulting formulas pass several consistency checks and limit to the well-known expressions for MHV scattering of gluons and gravitons when the background becomes trivial.

1126471

Submitted

Journal Article