# Measurement of tau identification efficiency at CMS

Verzetti, M (2011). Measurement of tau identification efficiency at CMS. PoS - Proceedings of Science, (417):online.

## Abstract

We report the measurement of the hadronic tau identification efficiency using a tag and probe method. The technique exploits Z ! tt decays using as tag a tau decaying into a muon. This result was obtained using an integrated luminosity of 1:2 fb collected with the CMS detector in the first part of 2011.

## Abstract

We report the measurement of the hadronic tau identification efficiency using a tag and probe method. The technique exploits Z ! tt decays using as tag a tau decaying into a muon. This result was obtained using an integrated luminosity of 1:2 fb collected with the CMS detector in the first part of 2011.