Scattering amplitude and its soft decomposition

TL;DR

This paper reviews the soft limit property in scattering amplitudes, demonstrating how it relates n-point to (n-1)-point amplitudes and enables their decomposition into soft channels, offering new insights into amplitude construction.

Contribution

It introduces a novel method to decompose scattering amplitudes into soft channels using their soft limit properties, enhancing understanding of amplitude construction.

Findings

Soft limit relates n-point to (n-1)-point amplitudes

Amplitude decomposition into soft channels is possible

Provides a new framework for constructing amplitudes from soft limits

Abstract

In the pure scattering theory, the universality of the soft limit has been studied for a long time. In this talk we review the property of soft limit to relate an $n$-point amplitude to an $(n-1)$-point amplitude. We show how this property can be used to decompose amplitudes into different complementary soft channel. The existence of such decomposition provides a new way to understand how to construct amplitude solely from them soft limit.