1. Simulation Update
S. Margetis

2. Issues
Since in August most people were gone the action items are the still the same as listed in Jim’s slide for the BNL meeting (next slide)
Inclusion of ‘PileUp’ in full simulations
Jim’s hand calculations show small effect (slide 4)
Full simulation of IST-less configuration
Some progress in understanding difference between hand and full D0 reconstruction efficiencies
AOB, ie increase statistics for detail GEANT ‘Patch’ studies

3. Pileup – critical to selling the proposal
A modest proposal
Proposal geometry and configuration (TPC+SSD+IST2+IST2+PXL2+PXL1)
with pileup
without
Reduced configuration with standard geometries (TPC+SSD+PXL2+PXL1)
Does Pileup Matter?
Does the configuration matter?

4. A Prediction – pileup doesn’t matter for a 200 sec detector
Proposal configuration with pileup and UPC electrons
Proposal configuration without pileup and without UPC electrons

5. Inlusion of PileUp in GEANT simulations - our current scheme
Three sources
Out of time events, UPC e, Beam background
Out of time events are introduced as correlated background from parametrized minbias and zvertex shapes. Infinite momentum (straight line is assumed)
UPC e and Beam background as white noise. Spiraling can be accounted but not as correlated noise. We need guidance about actual numbers here.
Compromises are mostly seconf order effects and due to schedule

6. In full simulation we used realistic TPC (dead sectors/padrows etc) [perhaps not a good idea]
Unassigned hits
on tracks
All hits

7. In full simulation Kaons decay properly. Now things are coming together
Proposal plot
Hand with Kaon decay

8. Summary Pile-up work has began
We have a agreed upon scheme
Handshake between Hand/GEANT seems feasible
Tight but possible schedule for End-November review