1. 9/14/2001D0 Simulation Tasks Q.Li 1 Simulation Tasks Status Qizhong Li Fermilab Sept. 14, 2001 D0 Collaboration Meeting

2. 9/14/2001D0 Simulation Tasks Q.Li 2 Outline: P10 production release –D0gstar –D0Sim –D0Trigsim Plans for p11 production release –D0gstar/D0Sim/D0TrigSim –D0Raw2Sim –Pmcs

3. 9/14/2001D0 Simulation Tasks Q.Li 3 D0gstar D0gstar -- full GEANT simulation (lead by Shuichi Kunori) In p09 and p10 production releases: – All detectors, including LUMI and FPD. –New 3D magnetic field map. –New interface to access to the field configuration (get map version, get solenoid and toroid polarity). –Default ECUTs for calorimeter plate level geometry were lowered to get more accurate response.

4. 9/14/2001D0 Simulation Tasks Q.Li 4 D0gstar(cont.) –A new option to swim very forward p/pbar to FPD in double precision was added. This option is OFF as default. –New access methods on the option of FPD geometry and tracking in event information. –Changed from GEANT 3.21.12 to GEANT 3.21.13 (Geant bug fix).

5. 9/14/2001D0 Simulation Tasks Q.Li 5 D0sim D0Sim (lead by Serban & Qizhong), uses D0gstar output to produce simulated raw data events. It performs following functions: –Merge hard scatter and minbias events –Add calorimeter pileup from previous events –Make L1CalTTowerChunk for L1 simulation –Add calorimeter noise –Add SMT noise and inefficiencies –Add CFT noise and inefficiencies –Add Muon noise and inefficiencies –Make a RawDataChunk –Drop all D0GStar chunks

6. 9/14/2001D0 Simulation Tasks Q.Li 6 D0sim production releases P08.12.00: pileup + CalWeight + cps, fps, cft, smt digitization + muon raw data + CalDataChunk + RawDataChunk + L1CalTTChunk RawDataChunk: cal+muo+smt+cps+cft+fps CalDataChunk: uses cal+preshower optimized weights Only FPD and L0 still missing.

7. 9/14/2001D0 Simulation Tasks Q.Li 7 D0sim releases (cont.) P09.10.00: –Turned on smt noise simulation –use cal only optimized weights in L1CalTTChunk. –Handle both mixture and plate geometry. P10.03.00: –CalDataChunk uses cal only optimized weights –added code to handle pseudo SimChunks.

8. 9/14/2001D0 Simulation Tasks Q.Li 8 CPU Time D0gstar: (sec/event on d0mino) Plate uses a factor of 3 more CPU than mixture. 256 788 ttbar 168 450 Z  ee mixture plate

9. 9/14/2001D0 Simulation Tasks Q.Li 9 CPU Time D0sim : (sec/event on d0mino) 2.5mb overlap uses a factor of 2-3 more CPU than no minbias. Plate uses 15-30% more CPU than mixture. 176 99 193 109ttbar 122 49 158 62Z->ee Mix 2.5mb Mix 0mb Plate 2.5mb Plate 0mb

10. 9/14/2001D0 Simulation Tasks Q.Li 10 Production release certification procedure Generate MC events using D0gstar/D0sim: Test RawDataChunk by running each subdetector examine in offline mode. Run Sim_exam, compare histograms. 2.5 mb, 0 mb Single e 2.5 mb, 0 mb ttbar 2.5 mb, 0 mb Z  2.5 mb, 0 mb Z  2.5 mb, 0 mb Z  ee mixtureplate

11. 9/14/2001D0 Simulation Tasks Q.Li 11 SMT examine plots (from Elizaveta)

12. 9/14/2001D0 Simulation Tasks Q.Li 12 ttbar 2.5 mb mixure vs plate in calorimeter in the different layers of calo plate mix EM10.0190.018 EM20.0140.015 EM30.013 0.013 EM40.0200.021 Fine hadr0.0250.025 Coarse hadr0.0310.031

13. 9/14/2001D0 Simulation Tasks Q.Li 13 p T in cells (ttbar 2.5mb plate)

14. 9/14/2001D0 Simulation Tasks Q.Li 14 p T in cells (ttbar 2.5mb mixture)

15. 9/14/2001D0 Simulation Tasks Q.Li 15 ttbar 2.5 mb mixture vs plate in calorimeter in the different layers of calorimeter (GeV) plate mix EM1 60.0 49.6  10 GeV difference EM2 25.9 28.1 EM3 62.3 60.0 EM4 46.8 46.2 Fine hadr na na (overflow) Coarse hadr 19.0 24.4

16. 9/14/2001D0 Simulation Tasks Q.Li 16 E tot in layer (ttbar 2.5mb plate)

17. 9/14/2001D0 Simulation Tasks Q.Li 17 E tot in layer (ttbar 2.5mb mixture)

18. 9/14/2001D0 Simulation Tasks Q.Li 18 ttbar 2.5 mb mixture vs plate in calorimeter in the different layers of calorimeter plate mix EM1 2475 2114  15% more cells in plate EM2 2259 2297 EM3 na na (overflow) EM4 2265 2363 Fine hadr 5900 5416 Coarse hadr 1296 1387

19. 9/14/2001D0 Simulation Tasks Q.Li 19 D0TrigSim The trigger simulation program, D0TrigSim, includes L1/L2 and L3 simulation. This effort is lead by Serban and Dugan Oneil. The main cvs package is d0trigsim. L1/L2 default config is in tsim_l1l2. L3 default config is in tsim_l3. A new script runD0TrigSim is a trigsim wapper to be used to run the executable. Features include: –setup up all necessary config files –allows use of xml trigger list

20. 9/14/2001D0 Simulation Tasks Q.Li 20 D0TrigSim and the Trigger Database The design has always been that users grab a trigger list from the trigger database (or make a new one), hand that list to trigsim and wait for the results. How close are we? The trigger database is now in production. A 20 trigger list has been written for MC use. The new script will allow users to take any xml file generated from the trigger database, and send it through coorsim. Coorsim creates configuration files which can be read by d0trigsim. D0trigsim runs, creates an ntuple. The chain is now in place! Need more testing, but great progress has been made.

21. 9/14/2001D0 Simulation Tasks Q.Li 21 Release status P06.00.01 - The 1st production release... too old. P08.12.00 - Stable version. It has run on Nx100K events without crashing. … getting old. The above versions didn’t use cal trigger tower weights to reconstruct energy. P09.08.00 - not stable, but use cal weights optimized for plate geometry. P10.03.00 - The most recent release made this week. More functionality, need test. For example, Single e (P T = 20 GeV) MeanRMS p0817.11.6 P09-mix18.82.5 P09-plate19.12.0

22. 9/14/2001D0 Simulation Tasks Q.Li 22 Single e p T plot from p10 mix & plate compared with old release.

23. 9/14/2001D0 Simulation Tasks Q.Li 23 D0TrigSim in p10 P10 contains a lot of big changes for d0trigsim infrastructure. For example L1/L2 changes to run on real data: –l1l2unpacker learns VRB format. –more analyze packages read directly from RDC (l1cal, l1muon, l2caljet, l2calmet, l2calem, l2cps, l2gbl). –tsim_l1ft completely rewrites L3 output classes to better emulate real data. New unpacker to be written for l1ft analyze package and examine. More functionality added to l2gbl (track match), L3 filter/tools, L2errorlogger integration, etc.

24. 9/14/2001D0 Simulation Tasks Q.Li 24 D0TrigSim P10 certification Run d0trigsim on p09.08.00 MC reco certification samples: process # of events ttbar 1k WH    1k single e 15k single  10k QCD (p T >20) 2k Z   bb ~200 Memory use and CPU time: ttbar single  Memory max 125Mb 115Mb L1/L2 time 2.1s/evt 0.6s/evt L3 time 23.7s/evt 7.4s/evt Total CPU 27.2s/evt 8.3s/evt

25. 9/14/2001D0 Simulation Tasks Q.Li 25 P10 plot for the number of L2 trigger bits passed

26. 9/14/2001D0 Simulation Tasks Q.Li 26 P10 plot for the fired L2 trigger bit (L2 plots are from Oneil)

27. 9/14/2001D0 Simulation Tasks Q.Li 27 Plan for p11production release P11 production release schedule: Oct 15, 2001: All major improvements to D0gstar, D0SIM, TrigSim and L3 tools MUST be released. Oct 29, 2001: All major improvements to D0reco MUST be released. Nov 26, 2001: Production version is created, and formal certification begins. Dec. 21, 2001: Certification finishes.

28. 9/14/2001D0 Simulation Tasks Q.Li 28 Plan for p11(cont.) D0gstar: –Tune parameters for GEANT with real data. –Adjust ECUT values after studying the low energy particle effects. – Remove bugs. D0Sim: –get more realistic minbias overlap and noise simulation by using real minbias data overlapping on MC events. Use new program D0Raw2Sim

29. 9/14/2001D0 Simulation Tasks Q.Li 29 Plan for p11 (cont.) D0Raw2Sim: Intended to produce minbias files from real data for merging with MC events in D0Sim. Necessary steps: 1) Unpack RawDataChunk 2) Convert unpacked chunk to digi chunks 3) convert digi chunks to pseudo SimXXXHit chunks 4) Make L1CalTTChunk Step 1) and 2) handled by d0reco packages. All packages for step 3) are ready and released. For calorimeter need to make MC CalDataChunk == data CalDataChunk RawDataChunk  L1CalTTChunk

30. 9/14/2001D0 Simulation Tasks Q.Li 30 Plan for p11 (cont.) D0TrigSim: –all L1 packages pack/unpack like real data –all L1 packages work in "pass-through" mode – L1FPS joins simulation –all L2 analyze packages work directly on real data –L2STT joins simulation –XML files from trigger database –d0_analyze works fully (integrates mc_analyze, trigsim_analyze and reco_analyze outputs into one root tree)

31. 9/14/2001D0 Simulation Tasks Q.Li 31 Plan for p11 (cont.) Pmcs -- Fast Monte Carlo (Sarah Eno & Elemer Nagy) The general framework of PMCS is in place and the current work focuses on providing the smearing functions for the various physics objects. Major effort now to put pmcs output into d0phyobj chunk, and to simulate the variables in chunk properly. A first version of PMCS for general use is expected for p11.

32. 9/14/2001D0 Simulation Tasks Q.Li 32 Summary P10 D0gstar/D0Sim/D0TrigSim are ready to be used to generate big sets of Monte Carlo events for physics use. A lot of progress and improvements. Working hard on preparing p11 production release. Pmcs will be ready for physics use soon. Our goal is to make the Monte Carlo simulation as close to real data as possible.