# Associated production of a top pair and a Z boson at the LHC to NNLL accuracy

## TL;DR

This paper improves theoretical predictions for top-antitop and Z boson production at the LHC by applying advanced resummation techniques to enhance accuracy of cross section calculations.

## Contribution

It introduces a NNLL resummation framework for top-antitop plus Z production, matched with NLO results, for more precise LHC predictions.

## Key findings

- Enhanced total cross section predictions at 13 TeV
- More accurate differential distribution calculations
- Validated resummation approach against existing data

## Abstract

We study the resummation of soft gluon emission corrections to the production of a top-antitop pair in association with a Z boson at the Large Hadron Collider to next-to-next-to-leading logarithmic accuracy. By means of an in-house parton level Monte Carlo code we evaluate the resummation formula for the total cross section and several differential distributions at a center-of-mass energy of 13 TeV, and we match these calculations to next-to-leading order results.