I would suggest that we start by redoing a couple of runs where the "efficiency" is low, and a couple where it is high. Let us redo ltr, gtr, dst (at the same time, and thus, presumably, with exactly the same software) and see how it looks. The only guess I have as to why the number of tracks falls with version number is that (maybe?) someone has "improved" some cuts. Cheers, Ian On 01/07/2005, at 18:54, flemming videbaek wrote: > During the ewednesday meeting there was a discussion on the a > behaviour observed by Catalin > see > http://www.nbi.dk/~ristea/QM05/ > > See the t4t5/ffs etc.. > > Pawel pointed out that (a little while back too) that the DC > enhancement was not always on. > the two jumps at 10300 and 10484 does not seem to be correlated with > - anything noted in elog (basically change of down scales during a > store. > - calibrations for any sub system. > - looking at overall rates of tracks i.e. global tracks/trigger 2 > there is a slight change with runs > 299,300,301 -> 0.293,0.317,0.33, - this could be related reducing > backgrounds. The H2 rates drops quickly throughout these runs. > Thus no solutions > > > By coincident I looked at run 10384/10385. This was interesting > since it has 3 sets of gtr's > stting around. Apart from this it was also rerun recently on June > 22 (coincidently not using the submitGtr.perl script ) with DC > enhancement on. > > the truely remarkel fact is that the number of good tracks getting > out of the globals tracking > drops as more reconstruction is doen > > version T4T5 T3T4 FFS T24 GlobalTracks > 6 320 340 2354 528 132 > 5 328 319 2359 527 167 > 4 328 319 2359 527 188 > > How can this be the case !! > I find this exceedingly worrisome. Since the numbers of overall > track in individual combinations > seems ok, how come that tracks are lost with time (of course they > may not have been good tracks, but it should be looked at. > > > flemming > > > > > > ---------------------------------------------------------------- > Flemming Videbaek > Physics Department > Brookhaven National Laboratory > > e-mail: videbaek@bnl.gov > phone: 631-344-4106 > _______________________________________________ > Brahms-dev-l mailing list > Brahms-dev-l@lists.bnl.gov > http://lists.bnl.gov/mailman/listinfo/brahms-dev-l > _______________________________________________ Brahms-dev-l mailing list Brahms-dev-l@lists.bnl.gov http://lists.bnl.gov/mailman/listinfo/brahms-dev-lReceived on Mon Jul 4 04:53:22 2005
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