Re: [Brahms-dev-l] tracking efficiency

Hi Natalia,

   thanks a lot for making this efficiency maps for d+Au data. I have 
one question - can you estimate the FFS tracking efficiencies for 8 and 
12 deg as well? (as I mentioned in my previous mail to you, about the 
data situation for those runs at 8 and 12 deg, most of them only has FFS 
tracks (especially for 8 deg data). And I have been trying to analyze 
only the FFS data, using H1 to do PID, which requires the efficiency 
only calculated for FFS. The list you have had already.)
 
   I would test the maps at 4 deg, you have had made already. I will let 
you know its performance.

Many thanks,
  Hongyan


Natalia Katrynska wrote:

> Hi Hongyan,
>
>  I've just put efficiency maps in to the official place
> /brahms/data08/corrections/trackEff/MappedEffic_run03_dau_200_nkv1.root,
> for gtrProd=3 and ltrProd=2. According to your suggestions I took all
> runs which you'd given me for 4deg data.
> However, for 8&12deg I calculated efficiencies ONLY for runs that 
> contain full FS tracks (this conditions is required by the efficiency 
> code).
>
> 1.For 4deg settings almost all runs don't have tracks
> in detector T3, thus T3 and T2 efficiencies are 0 which is
> correct and you shouldn't worry about that.
>
> In 4B3450 setting 8219 & 8220 runs have only a few tracks in the
> whole setup, don't they?
>
> 2. A similar situation is in the other 8 and 12 deg settings, but here it
> happens that some runs don't look good e.g. for T1 detector (I rejected
> runs: 8513 in 8A843; 8622-12A1692; 8560-12A843).
>
> In 8B843 setting  run 8159 has only FFS tracks, so for the full FS track
> analysis you should remove it.
>
> 3.In 12A843 I rejected run 8375.  This run is the only one that has T3 
> tracks. I suggest you to remove this runs from your analysis or treat 
> it separately. It is not only the issue of efficiency but also of the 
> momentum resolution.
>
>  If you have questions, please let me know.
>
> Best regards,
> nat
>
>


-- 
Hongyan YANG
Department of Physics and Technology  Phone:  +47 55 58 27 25 (Office)
University of Bergen
Allegt. 55, 5007 Bergen		      Fax  :  +47 55 58 94 40
Norway	    	 		      Email:  hongyan[at]ift.uib.no


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