CURRENT STATUS OF WORK FOR MC PRODUCTION 11-Apr-03 ======================================================= Trigger simulation M. Palutan, B. Sciascia Done EmC geometry S. Miscetti, C. Bloise Endcaps checked Barrel to be checked with new version of GEANFI executable Insertion of banks in HepDB EmC response module S. Miscetti, T. Spadaro, C. Bini Needs routine for att. len. simulation in endcaps (Needed plots exist, could also decide to omit) Needs to preserve CHIT Needs testing EmC response survey S. Miscetti, T. Spadaro What is correct light output for MC? Stochastic term: nominally 25 p.e./MeV/side Confirmed by analysis of reconstructed MC events In data: Factor of ~2 difference (Obtain 50-70% p.e./MeV relative to MC) Reduction 25 p.e. -> 15 p.e.: positive effects on energy resolution but adverse effects on time resolution too dramatic (64 ps stochastic term) Relaxation time of fiber may also need to be calibrated e.g. from 2.6 ns to 2.2 ns Sampling fraction X_0 calculated from 400 um Pb, 700 um SciFi layers This well reproduced by analysis of reconstructed MC events Not in agreement with data, however Seems like real calorimeter has more lead than MC Proposal: Tune thickness of lead, time constant of fibers, p.e. yield in MC Generate 1 million events Tune thresholds Need new execuatble with cards to tune these values Perhaps feasible to complete proposed program in 1 week DC geometry A. Antonelli, S. Dell'Agnello DC legs moved inside DC master volume This trick appears to resolve problem of disappearing calorimeter quadrants but no conflicts were observed so the situation is not totally clear Some code for propagation of particles thru DC needs light modification to prevent hits from being generated in the new master volume outside of physical volume of DC DC wire sag map S. Dell'Agnello, A. Antonelli Amplitude of dp modulation with new sag map less than it was with old map - not completely understood Role of new s-t calibrations? Other changes in GEANFI? Generate two samples with new and old sag map, consistent versions of GEANFI, datarec, try to isolate problem Sags don't look so bad, Simone will continue to study, but we can go ahead DC s-t relations P. De Simone Done, but will have to be re-done if a problem with sags DC dead/hot & efficiencies M. Moulson Done Energy loss in DC A. Antonelli Need to adjust scale factor in digitization routine Energy loss straggling of K+/- S. Bulychev Confirmed that Landau model is used Bulychev should make more precise statement of problem if concern remains Mechanism can be changed with data card if further study needed Background selection M. Moulson, S. Miscetti All 2001 bgg files produced (except for a very small number of problematic runs which give 0 bgg events) 2002 selbkg histograms being generated, started this morning Background insertion M. Moulson, S. Miscetti Done Beam position and momentum M. Moulson, S. Dell'Agnello 2001: 138 runs, 6.5 pb-1, of which 48 have statistics too low to obtain values Probably discard, but this should be registered somewhere 76 have large spreads in one of Px, Py, Pz Increase tolerance of this value, or discard affected runs Decision at meeting: purge ALL affected runs (138) This needs to be done, will be done together with some bad runs found in bgg scan (as above). 2002: 178 runs from 2002, 25.5 pb-1 Reassess situation after BVLAB results available from SELBKG histgramming jobs Beam energy spread C. Gatti, T. Spadaro Three values to be used, hard coded by run range Two values (280, 320) for 2002, 1 value (300) for 2001 Generator phi/ISR M. Antonelli Done Generator omega -> pi0 gamma P. Gauzzi Done Generator a0/f0 gamma P. Gauzzi Done Generator K0 -> pi+pi-gamma T. Spadaro, C. Gatti, M. Antonelli IB simulation complete, tested Interfacing with GEANT (~half a day of work) Generator KL3g C. Gatti, M. Antonelli, T. Spadaro Amplitude obtained Same regularization procedure as for pi+pi-gamma to be adopted 1 week of work needed to complete Generator KL3g F. Scuri Tested, 30 MeV cutoff, needs adjustment if we use? Regeneration A. Ferrari All working except treatment of nuclear recoil? Should know more Monday Dalitz maxima for K -> 3 pi C. Bloise Done Generator eta -> pi +pi- pi0 F. Ambrosino Installed. Is it tested? BABAYAGA F. Nguyen, C. Bloise Done: Axes reversed, kinematic bug fixed DB modifications I. Sfiligoi Igor writing new table so that we can make MC DST's from more than a single MC run Should be ready by end of next week Scripting for MC production M. Moulson Not much progress this week but almost ready Bank-reduction code for DST's M. Moulson Done Streaming code for DST's C. Bloise MC-truth based event filter done Scripting for DST production M. Moulson, C. Bloise My estimate: > 1 week