Cluster Finding
l Three Clustering Algorithms Currently Implemented
– Cluster Cheater (uses MC truth to “cheat”)
– Simple Cluster Builder (Touching Cells)
– Radial Cluster Builder
• All algorithms tend to produce many very low energy
clusters - important to set sensible thresholds
l Still Needed - Cluster Refinement Stage
– Combine HAD + EM clusters
– Endcap + Barrel overlap region
l In Progress - Track Cluster Association
– Initial Implementation Done by Mike Ronan
– Output Format defined by Gary Bower
– Need to Extend Definition of Clusters
• Directionality, Entry point to calorimeter