# Measurements of $\gamma$ from tree-level decays

## TL;DR

This paper discusses the LHCb experiment's methods for precisely measuring the CKM angle gamma using various tree-level meson decays, combining multiple results for improved accuracy.

## Contribution

It presents the latest combined measurement of gamma from multiple decay modes, enhancing precision in CKM angle determination.

## Key findings

- Multiple independent gamma measurements from different decay modes.
- Combined analysis yields the most precise gamma value to date.
- Results contribute to testing the Standard Model's CP violation predictions.

## Abstract

The LHCb approach for a precise determination of the CKM angle $\gamma$ from tree--level decays is presented. Up to 16 independent determinations, using a variety of beauty and charm mesons decay modes, are available at LHCb. Not all of them have the same sensitivity to $\gamma$. The best accuracy is reached by combining all of the available results. These proceedings review some of the independent determinations used in the combination and present the latest combined result available, as of Summer 2018.