[G12] G12 Kinematic Fitter for pions

[Lei Guo]

I have seen something similar before... People do different cuts to preselected events, such as pid, timing, etc. when u do a more stringent precuts, the cl looks better. Not sure if this is the cause for the current issue

Regards.

Sent from my iPhone

> On Dec 19, 2015, at 1:40 AM, Michael C. Kunkel <mkunkel at jlab.org> wrote:
> 
> Greetings,
> 
> My issue is with the difference of the pulls under the same conditions. This should not be. This can only be true if somehow the data sets are different. I do not agree with you that we an live with somewhat different pull and CL distributions and I believe having a meeting on this would be beneficial.
> 
> I understand we have been through this several time, in fact it is always FSU that brought this up and it was discussed. Now I am bringing it up and wish to discuss it. I would hope for the same professional courtesy as FSU received on the subject. 
> 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
>> On 12/18/15 6:16 PM, Volker Crede wrote:
>> Michael,
>> 
>> We have been trough this several times and I am afraid we will never agree on these fine-tuning parameters. On the other         hand, as long as the actual code is the same, I believe we can live with somewhat different pull and CL distributions … provided they look okay.
>> 
>> - Volker
>> 
>> 
>>> On Dec 18, 2015, at 12:11 PM, "Michael C. Kunkel" <mkunkel at jlab.org> wrote:
>>> 
>>> This is obvious, and hence why Lei asked for everyone to show their pulls.
>>> 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
>>>> On 12/18/15 6:09 PM, Volker Crede wrote:
>>>> Apparently, there is more to it … Our distributions look better.
>>>> 
>>>> - Volker
>>>> 
>>>> 
>>>>> On Dec 18, 2015, at 12:06 PM, Michael C. Kunkel <mkunkel at jlab.org> wrote:
>>>>> 
>>>>> Incorrect. If you run a diff on the codes from FSU and the one shown there is no difference in any file.
>>>>> 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
>>>>>> On 12/18/15 5:35 PM, Volker Crede wrote:
>>>>>> Michael,
>>>>>> 
>>>>>> I don't think this is what FSU uses for the pions … Our pulls and CL distribution look slightly better.
>>>>>> 
>>>>>> - Volker
>>>>>> 
>>>>>> 
>>>>>>> On Dec 16, 2015, at 5:49 AM, Michael C. Kunkel <mkunkel at jlab.org> wrote:
>>>>>>> 
>>>>>>> Greetings, 
>>>>>>> 
>>>>>>> Below is a link that shows the pull probability and pull distributions look like for the tune channel of p pip pim. These parameters are what                                   FSU, ODU, Bochum, and others use for pions. 
>>>>>>> We had agreed that the pull distributions were adequate if the                                   pull probability is adequate.  However                                   as you can see from the plot, there is a small rise in the pull probability when it approaches 1. 
>>>>>>> 
>>>>>>> https://www.jlab.org/Hall-B/secure/g12/mkunkel/G12_MEETINGS/excl_ppipi_10.pdf
>>>>>>> What do you think about this?
>>>>>>> -- 
>>>>>>> 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
>>>>>>> _______________________________________________
>>>>>>> G12 mailing list
>>>>>>> G12 at jlab.org
>>>>>>> https://mailman.jlab.org/mailman/listinfo/g12
> 
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