Hi,
I calculated efficiency in all FS detectors, except the Cherenkovs (C1
and RICH), for all
the runs between 5361 and 5823 (4 deg, field 1/5, 1/3 and 1/2) .
The results are stored on rcas in the file
~ufstasze/effic/Effic5361_5972.root as a
3-dim histograms. The histograms are named like in the following
example:
Rot4Field1_3B_T5,
4 - rotation
1_3B - filesd 1/3 at B polarity
T5 - detector T5.
Title of each histogram contains list of runs which were used in the
calculations.
x, y, z axis of each histogram is related to centrality ([%],using
Tile+Si), local x position in given detector [cm]
and local x-slope [rad] in a given detector, so the histograms contain
efficiency versus centrality,
x add x-slope. To see the binning one can do
(Rot4Field1_3B_H1->Project3D("x"))->Draw();, and the same for "y" and
"z".
I haven't attempt to parametrize the efficiency, and in many cases this
is very problematic,
e.g. to go from 3 dim. to 1 dim. distribution one have to integrate over
two of the 3 variables, using
some sample of tracks. The problem is, that the samples we use after the
pid cuts can significantly differ from
the sample of my reference tracks (different x and x-slope
distributions, and different bias on centrality)
and the averaging will lead to a different results.
Opinion and suggestions are very welcome.
If everything goes well I will add efficiency calculations for run
between
5513 and 5972 (3 deg-1/2, 8 deg-1/5, 12 deg - 1/5,1/2,2/3).
Some debbuging/analysis plots are available from
http://www.nbi.dk/~staszel/fs/efficiency/
Regards Pawel.
--
----------------------------------------------------------------------
| Pawel Staszel |
| Niels Bohr Institute Tb 8 email: staszel@nbi.dk |
| Blegdamsvej 17 phone: (+45) 35 32 53 51 |
| København Ø FAX: (+45) 35 32 50 16 |
| Danmark |
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