Re: [Brahms-dev-l] tracking efficiency

Hi Hongyan,

 If you have setting where there are one or two runs with FFs tracks 
probably you could estimate the efficiency using calculated maps (like 
in 8B843 with run 8159; 8A230: runs 8154 and 8155; 8B230: run 8158).
In case  you don't have maps for given setting (e.g. 8B427) it might be 
estimated taking the efficiency of other setting (8A427 -  here you 
should be careful because the efficiency is calculated only for one run; 
by the way in the setting 8B427 there is also only one run).

With regards,
nat     
   

> 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
>>
>>
>
>

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