1. Calculation of alternative coefficients for cluster classification from QCD di-jet data
H A D R O N I C C A L I B R A T I O N W O R K S H O P
May 2006
Martin Pécsy
Comenius University, Bratislava
diploma student

2. Analysis of jet clusters
coefficients for cluster classification can be derived from QCD di-jets data the same way as for pions
my task was to do that
this task required lot of CPU time because of the large amount of data
we used three topological moments from
CaloTopoClusterMaker correlated with
EM fraction of energy
we calculated fraction of EM energy as a
mean value from this three topological moments
Hadronic calibration workshop, MPI Munich, 03 May 2006

3. Analysis
We tested 25 η bins for different energy cut to define the range where the method works.
cut 2 GeV
Hadronic calibration workshop, MPI Munich, 03 May 2006

4. Analysis - one interval η for different energy cuts cut 1 Gev
Hadronic calibration workshop, MPI Munich, 03 May 2006

5. Conclusions
used topological moments of clusters are good correlated with EM fraction of energy also for jets
the method for classification of pions works also for jets
I assign additional coefficients from jet data, which can by used for classification of clusters, although probably the coeficients from pion data will be used
Hadronic calibration workshop, MPI Munich, 03 May 2006