Improving ResBos for the precision needs of the LHC

TL;DR

This paper enhances the ResBos simulation tool for vector boson production at colliders by increasing its theoretical precision to N^3LL+NNLO, introducing a new non-perturbative function with rapidity dependence, and analyzing its impact on W boson measurements.

Contribution

The authors significantly improve ResBos accuracy to N^3LL+NNLO, develop a new non-perturbative function incorporating rapidity, and evaluate its effects on collider measurements.

Findings

ResBos v2.0 achieves higher theoretical precision.

The non-perturbative function shows mild rapidity dependence.

Enhanced accuracy influences W boson measurement analyses.

Abstract

The resummation calculation (ResBos) is a widely used tool for the simulation of single vector boson production at colliders. In this work, we develop a significant improvement over the ResBos code by increasing the accuracy from NNLL+NLO to N${}^3$LL+NNLO and release the ResBos v2.0 code. Furthermore, we propose a new non-perturbative function that includes information about the rapidity of the system (IFY). The IFY functional form was fitted to data from fixed target experiments, the Tevatron, and the LHC. We find that the non-perturbative function has mild rapidity dependence based on the results of the fit. Finally, we investigate the effects that this increased precision has on the measurement of the $W$ boson by CDF and impacts on future LHC measurements.