[Hps-analysis] Moller Gap Update

[Valery Kubarovsky]

Brad,
Well, but why we can not see it in data?
vk
----- Original Message -----
> From: "Nathan Baltzell" <baltzell at jlab.org>
> To: "Bradley T Yale" <btu29 at wildcats.unh.edu>
> Cc: hps-analysis at jlab.org, "Valery Kubarovsky" <vpk at jlab.org>
> Sent: Friday, April 15, 2016 4:00:30 PM
> Subject: Re: [Hps-analysis] Moller Gap Update

> So it is due to ecal acceptance?  Then is it possible to replot
> reconstructed mc without ecal (trigger) requirements?
> 
> 
> 
> 
> On Apr 15, 2016, at 15:41, Bradley T Yale <btu29 at wildcats.unh.edu> wrote:
> 
>> 
>> Here is the data for comparison, same SVT cut.
>> There are more hits away from the corner, and so no gap in the energy.
>> 
>> From: Hps-analysis <hps-analysis-bounces at jlab.org> on behalf of Bradley T Yale
>> <btu29 at wildcats.unh.edu>
>> Sent: Friday, April 15, 2016 3:33 PM
>> To: hps-analysis at jlab.org; Valery Kubarovsky
>> Subject: [Hps-analysis] Moller Gap Update
>>  
>> I think I may have found the cause as to what is causing that dip in the 2.3 GeV
>> Moller track energy after recon:
>> Not the generator. Pure geometric acceptance.
>> 
>> Plots 1-2: 1.056 GeV MC is suspiciously free of dips after recon, and the hot
>> ECal hits are all above the electron hole.
>> This is using the old generator by the way.
>> 
>> Plots 3-4: These are only the Mollers which had that strange "gap" in layer 5
>> SVT hits (-9 to -13 mm). The final plot shows the gap.
>> Notice where they land on the ECal.
>> 
>> So it seems that the corner of the electron hole happens to be where electrons
>> with exactly half the beam energy go for 2.3 GeV...
>> 
>> -Brad
>> <neg_hits.png><TRACK_Energy.png><WTF_gap.png><GapTrackE.png>_______________________________________________
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