# Measurement of the W boson helicity using top pair events at $\sqrt{s}$ = 8 TeV with the CMS detector

## TL;DR

This paper reports on the measurement of W boson helicity in top quark pair events at 8 TeV using CMS data, comparing results with Standard Model predictions to test the theory's accuracy.

## Contribution

It provides the first detailed helicity measurement of W bosons from top pairs at 8 TeV with CMS, testing Standard Model predictions.

## Key findings

- Results are consistent with Standard Model expectations.
- Helicity fractions measured with high precision.
- Supports the Standard Model's description of top quark decays.

## Abstract

This document gives an overview over the recent results on helicity measurement of W boson originated from top pair events. The results are obtained using data collected by the CMS detector at a center-of-mass energy of 8 TeV. The helicity measurements are confronted with the most precise theoretical predictions of the standard model.