1. CHORUS Collaboration Meeting, Ishigaki, Japan/ 07-08 April 2003 MC productions and data/MC JETTA and specific generators Eficass and CHANT Data/MC comparison for emulsion events Summary and plans Ilya Tsukerman/ CERN-EP and ITEP Moscow (presented by J. Panman)

2. JETTA and specific generators WHINTER: non-official large production done CC, NC and charm events were simulated and reconstructed ASTRA: non-official large production done D s and D s * events were simulated and reconstructed QEGEN: small technical bug fixed by F. Di Capua Official production files were not affected. MCDIS: tests well advanced, ported to CVS JETTA improvements: -- June 2003 Details: IT talk at Feb. 2003 emulsion workshop

3. Eficass and CHANT New CHANT summ (setup4, all events,20 loops) -- done See plots and tables for data/MC comparison New CHANT DST/summ (the same) -- In progress CHANT-02-03-06; SUMM with FUJI for Netscan simulation CHANT (setup3, all, 20 loops) -- In progress Eficass (setup4, CC DIS, 120 loops) -- June 2003 CHANT (setup4, CC DIS, 120 loops) -- July 2003

4. Existing simulated DIS events

5. Existing simulated QE events

6. Fraction of 1  events

7. Energy measured in CALO

8. Leading muon momentum

9. Leading muon angle w.r.t.  direction

10. Primary vertex Y position

11. Primary vertex Z position

12. Summary and plans WHINTER and ASTRA: full production done New SUMM created, data/MC well advanced DATA/MC in general agree well; just a few problems CHANT setup3, new DST for setup4: running SUMM will have FUJI, needed for Netscan CHANT: 120 loops for CC setup4 -- July 03 http://choruswww.cern.ch/Internals/Offline/MC.Production/welcome.html