Hi all,

 I performed a comparison ibu vs cpf looking at mes plot mode by mode.

 I started with the tags used by Urs for the mc-data production (see
IslBrecoilUser/tags-112101). In ran just one reduced superblock1
collection for the D* (~2fb-1). The statisics is low but the results seem
to be compatible. The only relevant difference is in the B mode 38-39 (B
-> D 2k pi in K* window). There was a bug in the code for this mode. Now it is
fixed by Riccardo in the new tags of CompositionTools (rf-121701).

 I repeated the study with the new tags (IslBrecoilUser/tags-122101). We
have to add some new tags to make things working fine in analysis-12a. You
have to take the tags in

http://www.slac.stanford.edu/BFROOT/www/Physics/CP/beta/doc/postCP/tags-anal12

 I ran on two colletions (one of superblock1 and one of superblock2).
Again the results are very compatible. Just problems in some modes with
low yields:

 - mode 53 seems to be gone
 - some disagreement in mode with high multiplicity and with many kaons
   (19-20-35-45)

 No other evident bugs were found. More studies should be needed but since
these modes are not crucial we can post-pone them.


 Then the CONCLUSIONS are:

 - good agreement but I need to run on the full sample of reduced
   collections to say more.
 - no lack of yield in the main modes
 - Dpi mode is fine.
 - We have to move to the new tags with bug fixes for the new production

 - I don't understand numbers presented by Urs in

 http://www.slac.stanford.edu/BFROOT/www/Physics/Analysis/AWG/InclusiveSL/islreco
il/modes/mesallevents-0-1.eps

 All D*pi have a lack of ~25% in yields. In my study I did not see any
problem in this mode.
 I tried to look at the production root files for the D* and I noticed
something strange. For instance in:

/nfs/farm/babar/AWG/ISL/recoil/root/breco-112101/data/
dstar_092701_superblock1_2000_b2-s3_aa.root

I see ~630 events (originally the collection had 2000 events) and the run
range is 15300-15600. Runnning on the same collection I got ~1750 events
with a run range of 15300-16400. Something is wrong here and could explain
the difference in yield that we are observing. Urs, may you run on this
collection and check. Thanks,

 Daniele




On Fri, 21 Dec 2001, Urs Langenegger wrote:

>
> Hoi,
>
> ok, I  redid the mode-dependent study,  you can find  them starting at
>   http://www.slac.stanford.edu/BFROOT/www/Physics/Analysis/AWG/InclusiveSL/islrecoil/modes/modes.html
>
> The signal  pdf is a gaussian  for the mode-dependent  mes plots.  All
> modes I see are shown. No cut  on purity has been applied. All data in
> Run 1 in superblock 1 and 2 are used.
>
> I  now see 41376  B candidates,  fitted with  CB, this  is due  to the
> patched B+ modes, see
>
>   http://www.slac.stanford.edu/BFROOT/www/Physics/Analysis/AWG/InclusiveSL/islrecoil/modes/mesallevents-0-1.eps
>
> You can run the relevant macro by doing
>
>   cd ~ursl/root/anaRecoil
>   root
>   .L .../recoil.C    // wherever you have your IBU stuff
>   loadMergedFiles()
>   plotMes(2)  // the argument is the offset for the file
>
> Note:  Please edit recoil.C  first, so  that you  dump the  plots into
> another location (search for 'name' in plotMes() ...).  Of course, you
> can run it on your own rootfiles as well, just edit loadMergedFiles().
>
>
> Merry Christmas, now for good!
> --U.
>