Particle Flow Calorimetry and the PandoraPFA Algorith

Mark THOMSON
U Cambridge

The ILC electron-positron collider is being designed to operate in the 
centre-of-mass range 0.5-1.0 TeV. The ILC physics programme of precision 
measurements places stringent requirements on the detector performance. 
Of these requirements the goal of a jet energy resolution of 30%/sqrt(E) 
is probably the most challenging. It is widely believed that particle flow 
calorimetry is the most promising approach to meeting this goal. In 
particle flow calorimetry the energy deposits from individual particles 
are identified. Particle flow calorimetry requires highly granular 
calorimeters and plays a major role in the design of a detector for the 
ILC. In this seminar I will describe the ideas behind particle flow 
calorimetry and describe in detail the PandoraPFA algorithm. I will also 
discuss briefly the way forward in the development of Particle Flow 
reconstruction.