******************************* * Minutes of the EWWG Meeting * * 22nd of April * ******************************** . Monica recalled that the dead line for the Varsaw abstracts is the 24th of May , and that for the contributed paper is the 25th of June. . Large part of contributions and discussions was about the available Monte-Carlo for the differents channels and investigating the Galeph/Julia version used for the different production , in particular in the lepton channels: Here is the summary from Andrea and Gerardo investigations at the time of the meeting with additional information after the meeting. ************************************************************************ Please react if you think that some of these productions should be removed from the list. ************************************************************************ Geometrie Energy Galeph JULIA Generator Channel Stat Run# 90 pk 238/9 240/1 KORL03 tau 315K off pk 238/9 240/1 KOrl03 tau 104K pk 252.4 260.7 KORL04 tau 50K pk 252. 261 KORL05 tau 80K 91 off pk 250.5 258.4 KORL04 tau 35K pk 255.01 271.04 KORL06 tau 100K pk 250.08 258.4 KORL03 mu 60K pk 252. 261 KORL04 mu 18K pk 242.5 258.4 KORL04 mu 20K pk 242.05 258.4 PHOT01 qpm 130K all final state pk 242.05 258.4 PHOT01 VDM 36K 92 pk 253.07 264.09 KORL06 tau 100K xx8 pk 255 271 KORL06 tau 100K 1614 pk 255 271 KORL06 tau 100K 1624 pk 255 271 KORL06 tau 100K 681 pk 255 271 KORL06 tau 97K 691 pk 253.07 264.09 KORL06 mu 90K xx8 pk 253 264 KORL06 mu 60k 91 pk 255 271 UBAB01 ee 100K 101 93 pk+2 intf 256.2 276.04 KORL07 tau 97K 1752 pk+2 intf 256.2 276.04 KORL07 tau 97K 1756 Pk+2 alpha "" "" KORL07 tau 100K 1751 pk+2 alpha "" "" KORL07 tau 100K 1755 pk+2 expn "" '' KORL07 tau 97K 1750 pk+2 expn "" "" KORL07 tau 100K 1753 pk-2 expn "" "" KORL07 tau 100K 1754 pk 256.0 274.1 KORL07 tau 100K 1714 pk " ''' KORL07 tau 100K 1724 pk 256 276 koRL07 mu 100K 1757 beam wrong pk 257. 275.05 KORL07 mu 100K 911 pk 256. 274.5 PHOT02 qpm/vdm 1000K pk 256 274.2 GGmj01 10K To this we should add for tau pk 300K ( run: 1734,1735,1634) not yet available by scanbook 94 pk 303. 278.2 KORL07 tau 100K 440 pk "" "" KORL07 tau 100K 1744 Also we should add for tau 180K at pk (run: 914,924,934) and mu 90K (run:944), not yet available at cern . For 1995 Henri has been producing Monte-Carlo using 94 geometry Tau pk 180K ( run: 954,964,974) pk-2 90k run : 984 pk+2 90K run : 994 Those Monte-Carlo will soon be available at CERN . Henri recommands not to use Monte-Carlo prior to KORL05 For the next meeting Pere is going to investigate the Galeff/alephlib Julia version used in the different processings , with the eventual imcompatibilities. . General In the present scanbook luminosities for 90-91 there is a 120nb-1 discrepancy with the published value for the P point. Also there is a 30nb-1 discrepancy for the +3 point of '93. This was pointed out by Gerardo and has to be understood. . QQbar - For the TPC selection all is done in a coherent way from 90 to 95 included - For the calorimetric selection 90 and 91 have to be redone in a coherent way . Will be finished by mid-may . Mumu - Linked to the problem of Monte-Carlo , Andrea is developing a tool allowing to check on each MC tape the Monte-Carlo inputs used for the production for what concerns libraries, Kingal parameters etc. His tool also produces plots to study the kinematics. For the next future Andrea is going to go on with accep- tance studies and look at mumugg events . - For what concerns the cross-sections, the 95 results are still missing entirely and are clearly priority 1. Andrea will produce those with the standard analysis and if would be desirable if also Imma could do that. In parallel Imma is also reanalysing 90-95 with the single arm technique in a coherent way. Tau Gerardo looked at the present selection and concluded that the present selection systematics (0.26% compared to 0.28% final statistical) is acceptable. Anna has final numbers for 94 , and will do 95 (again this is priority 1). To be coherent 90 and 91 have to be redone ( 92 has already been redone) . To study the background more MC is needed: qqbar is ok ee needed gamma gamma needed .. (true?) . ee Lee presented the situation for bhabhas - For data 90-91-92 Helge should be contacted to check the availibily of the data sample - 95 analysis is almost ready - Unibab production needed for 90-91-92 94 and will be started soon (after clarifying a few points raised by Ioana) - In order to try to reduce the systematic error due to the t-channel subtraction some studies will be made to estimate the effect of reducing the cos(theta)* acceptance. The second approach is not to substract the t-channel (Pere should report on it) - Evaluation of Topaz/Alistar should be done . . Luminosity - Brigitte gave final luminosities for 1993 and 1994 (for which Alephnote 95-12/95-25/96-20 is the reference) and told us that the Luminosity for 1995 is close to be available. Next meetings: 2nd of May (14h) Helios Room 1-1-045 9th of May(15:30-> 17:00) Helios Room 1-1-045