DØ Level 3 Algorithms Meeting: 30th January 2002

Jet ID: Volker Buescher.
Jet+EM ran in p11.01.00 on 27K data events without a crash (until SAM gave up). Turn on curve will be presented next week.
L3Muon Status: Martin Wegner.
There were 2 main problems last time:
- As reported by Gustaaf to the email list, the memory leak in scriptrunner was a problem that had been fixed in December, but had never made it into the release. Now done.
- The track reconstruction efficiency was much lower in Monte Carlo than expected. Two possible causes were being investigated:
  - Problems with segments and tracks not lining up in the event display. Discussed in detail in the muon reconstruction meeting. Appears to be a problem that doesn't affect track finding, only the display.
  - A large fraction of the PDT hits were missing in p10.13. Many explanations floating around, and muon reco group expected to come up with a definitive understanding soon. But in the short term it looks like problem can be avoided by running jobs on d0mino.
Martin said in answer to a question that most of the infrastructure needed for local muon reconstruction is already in the current (p11.01.00) release.

Given the approaching target date of 11th Feb 2002 for the p11 release to L3 farm, we shall have a meeting next week.
Please send Terry feedback on, and contributions to, the new L3 algorithms web pages.

Scribe: Terry Wyatt.