# QM 2011 - XXII International Conference on Ultrarelativistic Nucleus-Nucleus Collisions

May 22 – 28, 2011
Centre Bonlieu
Europe/Zurich timezone

## Data-driven efficiencies for di-muon measurements in heavy ion collisions with CMS

Not scheduled
Théâtre National (Centre Bonlieu)

### Théâtre National

#### Centre Bonlieu

France
Board: 66
Poster Heavy flavor and quarkonia production

### Speaker

Collaboration CMS (UCLouvain)

### Description

CMS has been collecting single muon triggered data in 2010 at $\sqrt{s_{NN}} = 2.76$~TeV in PbPb in order to extract from real data efficiency corrections for muon based analysis. These results were used as an important cross-check for the Monte-Carlo based efficiency corrections used for the Z boson and quarkonia analysis in PbPb and taken into account in the systematics. This poster will review this {\it Tag and Probe} technique that is used for the data-driven measurement of muon efficiencies in CMS on PbPb data. Results obtained on data are compared to what is measured on Monte-Carlo.

### Presentation materials

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