A text summary of each talk is given below.  The transparencies can be
found at at the jet/met meeting page, under minutes:
Go to http://computing.fnal.gov/cms/jpg/minutes/may222002/minutes.html
and then click below
<br><a href="./wu/"> Yujun's </a>
<br><a href="./nikitenko/"> Sasha's </a>
<br><a href="./krokhotine/"> Andrei's </a>
<br><a href="./green/"> Dan's </a>



<plaintext>



   Minutes of the May 22, 2001 Jet/Met meeting
   -------------------------------------------


attendence: Sarah Eno, Shuichi Kunori, Isa Dumanoglu, Jordan Damgov,
Dan Green, Jim Brooke, Eric Aslakson, Yujun Wu, Sasha Nikitenkio,
Salavat Abdullin, Bart van de Vyver, Giacomo Bruno



                   Agenda
                   ------
         ntuples for new production - Yujun Wu
         taus with ORCA 6 - Sasha Nikitenko
         update on jets - Andrei Krokhotine
         jet splitting/merging - Dan Green



ntuples for new production - Yujun Wu
  Yujun presented the status of ntuple production for the spring 02
  production.  He said 43.6% of the data is now in ntuples
  (242,000 events) and that he expects everything to be finished in
  about 2 weeks.


taus with ORCA 6 - Sasha Nikitenko
  Sasha has been comparing the tau results from the old ORCA 5 production
  to the new ORCA 6 production.  The results look encouragingly similar.
  Some of the parameters he was using, however, needed to be retuned
  a little because the jet energy scale has changed (due to the switch
  from GCALOR to GHEISA and because of the much larger noise).  however,
  one new problem is that at high luminosity, the ratio of the
  reconstructed to raw tau energy is not constant with ET, and so
  he might need special tau jet energy corrections or to tune
  the threshold cut on the towers used in the tau jet.


update on jets - Andrei Krokhotine
   Unfortunately I'm not in CERN now and can't present it. So that could I
  ask you put it on the web in order other people can look at it. Or if it's
  not difficult for you show it instead of me.

  A few remarks concerning the plots:

    1. I recalculated rates with 95% Eff points for L1 jets and L2 jets.
  Unfortunately I found that in my previous calculations I made an error,
  namely instead of rates for L2 jets I plotted rate for L1 jets (down to
  1Hz). Now I recalculated rates. They are in a good agreement with ATLAS
  numbers. (you can see it at the table below the rate curves)

   2. I produced jet energy corrections for new ntuples (both L=2x10^33
  and L=10^34). Unfortunately the number of events in ntuples is rather
  small and some Et bins are still missing. It makes corrections be not
  "very" precise.


jet splitting/merging - Dan Green
   Dan has started to look to see if jet splitting/merging algorithms
   affect dijet mass resolutions.  He started looking at low luminosity,
   and finds it does help, but only a little.  He will look at
   high luminosity data, where it is expected there could be more
   problems later.