[G12] Cross Section Normalization

[Michael C. Kunkel]

Greetings Lei,

All final state particles are detected and preliminary it does not 
appear that this factor is localized to a region.
I am currently trying to do a rebin, but for preliminary purposes I have 
linked some plots.

As I have stated, I am trying to rebin in the bins of the plot of the 
known cross section. Which are taken from
http://hepdata.cedar.ac.uk/view/ins100089/prev

https://clasweb.jlab.org/rungroups/g12/wiki/index.php/Yield_Calculation


I do not see a CLAS publication on the rho0 cross section for 
photoproduction, nor do I see anything newer than what I have linked above.

BR
MK



On 5/9/13 2:10 PM, Lei Guo wrote:
> MK,
>
> Is your final state p pi- pi+ all detected? Do you have the same 
> conclusion that for Egamma > 3.6 GeV, there is no correction factor, 
> and the only correction factor (1.7) are for the lower beam energies?
>
> Lei
> On May 9, 2013, at 1:57 PM, Michael C. Kunkel wrote:
>
>> Hi Ken,
>>
>> The number I will provide is for comparison with Johann, where he 
>> derived a factor of 4.17, I am deriving a factor of 1.7.
>> There will be no numbers published until the reason for the 
>> discrepancy is discovered, and once it is discovered, we have planned 
>> to write an fully detailed account of our methodology.
>>
>>
>> BR
>> MK
>>
>>
>> On 5/9/13 12:57 PM, Hicks, Kenneth wrote:
>>>
>>> Hi MK,
>>>
>>> Are you planning to write down the details of how you got the cross 
>>> sections? There are many details that need to be done correctly, and 
>>> unless you provide the details (what bin sizes you used, what files 
>>> you used, how the acceptance was calculated, what trigger correction 
>>> is applied, etc.) then it’s no help to know what factor you need.  
>>> While I’m not proposing that you write a full analysis note, you 
>>> should at least say what you did to get your cross section.
>>>
>>> Best regards,
>>>
>>> Ken
>>>
>>> *From:* g12-bounces at jlab.org [mailto:g12-bounces at jlab.org] *On 
>>> Behalf Of *Michael Kunkel
>>> *Sent:* Thursday, May 09, 2013 12:51 PM
>>> *To:* g12
>>> *Subject:* [G12] Cross Section Normalization
>>>
>>>     Greetings G12,
>>>
>>>     I have compared my cross section visually and it appears that if
>>>     I needed a correction factor it would be no greater than 2. I
>>>     will supply the plots later as I am currently working on it.
>>>
>>>
>>> BR
>>>
>>> MK
>>>
>>> Sent from my iPhone
>>>
>>
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>
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