[G12] Kin. Fit and mom. corrections

[Andrea Celentano]

Dear Daniel,
thanks for your clarification! 

Bests and happy holidays

Andrea

> On Dec 25, 2018, at 23:21, Daniel Lersch <dlersch at jlab.org> wrote:
> 
> Dear Michael, dear Andrea,
> 
> Michaels memory is partly correct. The phi-dependent momentum-corrections should be used for the G12 data even though the kinematic fitter is applied. We ran various tests which showed that the fitter can handle these corrections to some extend only. 
> 
> Moreover, the kinematic fitter has been tuned for the g12 data, including the momentum corrections.
> 
> BUT the momentum corrections are not applied in MC. I know, it sounds obvious, but I just wanted to mention it. So in summary:
> 
> g12-Data: phi-dependent momentum  + kin. fit
> 
> MC: kin. fit
> 
> I hope this helps.
> 
> Best regards, merry Christmas and happy holidays,
> 
> Daniel
> 
>> Am 21.12.2018 um 13:11 schrieb Michael C. Kunkel <mkunkel at jlab.org <mailto:mkunkel at jlab.org>>:
>> 
>> Greetings Andrea, 
>> 
>> Line 339 
>> //event.g12Pcor();  //Momentum corrections....
>> Would invoke the CLASEvent version of momentum correction, which were never verified or used by anyone in G12.
>> We have a separate package for momentum corrections, which is basically a correction in phi. 
>> However, if memory serves me correct, these corrections should not be used if using the Fitter, because the fitter handles the phi correction. 
>> 
>> Maybe Daniel can remind us if my memory on this subject is faulty.
>> 
>> BR
>> MK
>> ----------------------------------------
>> Michael C. Kunkel, PhD
>> Forschungszentrum Jülich
>> Nuclear Physics Institute and Juelich Center for Hadron Physics
>> Experimental Hadron Structure (IKP-1)
>> www.fz-juelich.de/ikp <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.fz-2Djuelich.de_ikp&d=DwIFaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=VfjGbpV3arN3E9BjfYzJSA&m=v97LVmnWTPd87i9r-RflKraf57ZIu7nw_da6OGaGaJ4&s=jd92btY-CELZ0NnrE8jud66nbZzgH8xLp21ld9WGoWo&e= >
>> On 12/21/18 12:27 PM, Andrea Celentano wrote:
>>> Hi MK,
>>> reading on github your code for efficiency evaluation, I see the line responsible for momentum corrections is commented out (line 339 in https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_mckunkel_G12-5FCorrections_blob_master_Efficiency_EfficiencyCodes_BOSSkimCodes_PROT-5FEFF_Ppp-5FcE.cc&d=DwIFaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=VfjGbpV3arN3E9BjfYzJSA&m=v97LVmnWTPd87i9r-RflKraf57ZIu7nw_da6OGaGaJ4&s=V2ugJgOZB6mkfpIsznn4zA5hoo9jz6YAPBCu2XopQNM&e=  <https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_mckunkel_G12-5FCorrections_blob_master_Efficiency_EfficiencyCodes_BOSSkimCodes_PROT-5FEFF_Ppp-5FcE.cc&d=DwMCAg&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=JP4ECb6XWhhBOHoMsinS6A&m=r4TaHKz96dUdSHMnDyphvJK-8EHn2FsEz6P2Ft7OV0I&s=WtSUh6pGSjBxJkGN48PRMr_k_J27iqb8ErKwL_gTQbA&e=> for example). 
>>> Is this because you were performing tests on this? Or am I missing something?
>>> 
>>> Thanks,
>>> Bests,
>>> Andrea
>> 
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