This page is for documentation of pile-up work. Pile-Up refers to

1. Non-triggered events which occur during the Pixel readout
   1. Au+Au or p+p
   2. UPC background (mostly electrons)
2. General beam background due to Pixel proximity to the beam
   

Initial hand estimates (9/2007) by Jim Thomas are encouraging and they can be found in the file below named 'SimulationRequest'.