[Clas12_verystrange] [EXTERNAL] Re: FT based issues

[Raffaella De Vita]

Hi Nick,
I’m not sure I understand what goes in the plot on slide 5. The beta vs. p plots on slide 3 looks fine for data set #2 and, as far as I know, there are no issues with RECFT.
Best regards,
	Raffaella

> On 17 Jun 2020, at 09:36, nicholas <nicholas at jlab.org> wrote:
> 
> Hi Raffaella, 
> 
> There also seems to be an issue with the out-bending FTBased bank. See Delta Beta plot on  slide 5 for Data 2. This indicates that the pion was used for start-time info instead of the electron in FT (Geraint has been taking the info from RECFT). I was under the impression that the RECFT bank was fixed, but this might indicate that there are still some issues remaining. 
> 
> Best regards, 
> Nick
> 
>> On 17 Jun 2020, at 14:14, Raffaella De Vita <Raffaella.Devita at ge.infn.it> wrote:
>> 
>> Hi Geraint,
>> I think the skim10 wagon used in the unbending data does not select events using the FT-based pid but the regular, forward-detector based pid, which is incorrect. I would recommend not to use it.
>> Best regards,
>> 	Raffaella
>> 
>>> On 17 Jun 2020, at 07:54, Geraint Clash <gc1108 at york.ac.uk> wrote:
>>> 
>>> Hello Raffaella,
>>> 
>>> When analysing the skim10 data I found that there was an issue with the reconstruction of pi minus and proton as seen in the slides attached. Specifically, I am attaching Delta Beta and beta vs momentum plots for protons, and pions, using three data sets as indicated in the slides. Was this issue known? 
>>> 
>>> Best regards.
>>> Geraint Clash.
>>> <FT_based_issues.pptx>
>> 
>> 
>> 
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> 
>