[G12] Analysis Note

[Volker Crede]

Michael,

Would you be willing to show your cross section results separated out for the two target halves?

As you well know, our ω cross section has also been consistent with the published g11a results within about 5% … We did not notice any big problem until we looked into different channels

Cheers,
	
	Volker


On Sep 12, 2016, at 11:06 AM, Michael C. Kunkel <mkunkel at jlab.org> wrote:

> Greetings,
> 
> From how the problem was previously presented to g12, I did not feel there was cause for concern for others, as I had thought FSU was in "working on it". If there is assistance needed from g12 on this issue, could you please provide more detailed information.
> 
> G12's analysis of pi0 is consistent with previous data measurements of pi0 and moreover, for those energy ranges in which g12 has only the data, the theoretical models do a decent fit.
> 
> 
> 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 12/09/16 16:37, Volker Crede wrote:
>> Michael and others,
>> 
>> I will not be able to attend the g12 meeting today because of teaching duties. Zulkaida will contribute and represent FSU. In particular, we are interested in the discussion of the kinematic fitter with Kaons.
>> 
>> We are also working on our FSU g12 analysis note and as mentioned several times before, we ran into this nasty acceptance problem for the ω channel owing to the (large off-center) target position. The ω cross sections for the forward and backward half of the target differ by almost 15 - 20%. Michael, have you checked your cross section for a similar effect? At the moment, we are unsure how to proceed and how to account for this effect.
>> 
>> For similar acceptance reasons, we consider our double-pion analysis (for the energy range 1.5 - 3.5 GeV) dead or at least suspended for the moment; the g12-data quality is simply not good enough (compared to g11a, for instance). The g12-data may also not be good enough for the ω Dalitz-plot analysis, which may also affect other Dalitz-plot analyses. However, a conclusion has not been finalized. As Lei suggested, it would be good to compile a list of all analyses (and analysis notes) that would like to move forward.
>> 
>> Best wishes,
>> 
>> 	Volker
>> 
>> 
>> On Sep 12, 2016, at 9:17 AM, Michael C. Kunkel <mkunkel at jlab.org> wrote:
>> 
>>> Greetings G12,
>>> 
>>> Among all the other g12 business I emailed last week that I would like to discuss tonight, i.e.
>>> 
>>> 1) MC tape (see Haruts email to CLAS)
>>> 
>>> 2) Kinematic fitter with Kaons
>>> 
>>> I would also like to discuss my analysis note that I has been edited for length and content.
>>> 
>>> https://www.jlab.org/Hall-B/secure/g12/mkunkel/PAPERS/PI0/Analysis_note.pdf.
>>> 
>>> 
>>> Since we have the urgency to beat Hall-D, can we discuss the note first?
>>> 
>>> 
>>> -- 
>>> 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
>> 
>> 
>> 
>>