Re: [Brahms-dev-l] updates in fs efficiency

Hi Pawel,

Thanks for the update which I will study.

I am curious how some of the effeciency curves vs sigma looks for the run5
pp.
One reason is that local tracking in T1 and T2 is somewhat different for
tracks near the edges
using the corrections to positions that can be up to several mm's for both
T1 and T2. for tracks in
the TPC's there is little difference.

As reported earlier this has a marked improvement for the class of events in
momentum determination
when FFS only is used. It would be curious to see if it have an effect on
some of the effeciencies etc.

Flemming

PS the next analysis meeting is on Thursday not Monday which is Labourday



----------------------------------------------------------------
Flemming Videbaek
Physics Department
Brookhaven National Laboratory

e-mail: videbaek@bnl.gov
phone: 631-344-4106
----- Original Message ----- 
From: "Pawel Staszel" <ufstasze@if.uj.edu.pl>
To: "devlist" <brahms-dev-l@lists.bnl.gov>
Sent: Friday, September 02, 2005 12:43 PM
Subject: [Brahms-dev-l] updates in fs efficiency


> Hi,
> During the last phone conference I mentioned
> 10% deviation between efficiency corrected fsT2 and fsReg tracks
> (see
> http://zefir.if.uj.edu.pl/staszel/brahms/fseffic/yieldscorr/index.html,
> also for explanation of fsT2 and fsReg).
>
> It seems to me that I found the missing ~10% of fsT2 tracks and now
> the consistency between fsT2 and fsT3 yields is on the level of 2.5%,
> which is within the statistical
> uncertainties of derived T2 and T3 efficiencies. The updated analysis is
> described
> on
>
http://zefir.if.uj.edu.pl/staszel/brahms/fseffic/yieldscorr_update/index.html.
>
> Best regards
> Pawel.
>
> -- 
>  ----------------------------------------------------------------------
> | Pawel Staszel                                                        |
> | Jagiellonian University                                              |
> | Institute of Physics            email:      ufstasze@if.uj.edu.pl    |
> | Reymonta 4                      phone:      (+48) 12 663 5712        |
> | Krakow 30059                    FAX:        (+48) 12 633 7086        |
> | Poland                                                               |
>  ----------------------------------------------------------------------
>
>
>
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