# Theory Predictions for the Pull Angle

## TL;DR

This paper provides the first theoretical predictions for the pull angle, a jet observable sensitive to color flow, using all-orders resummation and including hadronization effects, and compares these with experimental data.

## Contribution

It introduces the first theoretical calculation of the pull angle, demonstrating its Sudakov safety and incorporating hadronization effects for comparison with data.

## Key findings

- All-orders resummation makes the pull angle distribution finite.
- Theoretical predictions agree with experimental measurements.
- Pull angle is confirmed as a sensitive probe of color flow.

## Abstract

Pull is a jet observable that is sensitive to color flow between dipoles. It has seen wide use for discrimination of particles with similar decay topologies but carrying different color representations and has been measured on W bosons from top quark decays by the D$\emptyset$ and ATLAS experiments. In this paper, we present the first theoretical predictions of pull, focusing on a color-singlet decaying in two jets. The pull angle observable is particularly sensitive to color flow, but is not infrared and collinear safe and so cannot be calculated in fixed-order perturbation theory. Nevertheless, all-orders resummation renders its distribution finite, a property referred to as Sudakov safety. In our prediction of the pull angle we also include an estimation of the effects from hadronization, and directly compare our results to simulation and experimental data.