1-5 September 2014
Faculty of Civil Engineering
Europe/Prague timezone

The Matrix Element Method within CMS

1 Sep 2014, 14:00
C219 (Faculty of Civil Engineering)


Faculty of Civil Engineering

Faculty of Civil Engineering, Czech Technical University in Prague Thakurova 7/2077 Prague 166 29 Czech Republic
Oral Data Analysis - Algorithms and Tools Data Analysis - Algorithms and Tools


Camille Beluffi (Universite Catholique de Louvain (UCL) (BE))


The Matrix Element Method (MEM) is unique among the analysis methods used in experimental particle physics because of the direct link it establishes between theory and event reconstruction. This method was used to provide the most accurate measurement of the top mass at the Tevatron and since then it was used in the discovery of electroweak production of single top quarks . The method can in principle be used for any measurement, with a large gain compared to cut-based analysis techniques for processes involving intermediate resonances. Within CMS, this method is mainly known as a cross check to test the newly discovered boson spin (MELA), and as a way to compute the main background for the Higgs production in association with a top quark (ttH). In this contribution, the MEM is presented using the example of two ways of using it through the two CMS analysis mentioned below. The advantages and limitations of this method will also be highlighted, and the latest approved results will be presented.

Primary author

Camille Beluffi (Universite Catholique de Louvain (UCL) (BE))

Presentation Materials