[Hps-analysis] Moller Gap Update

[Nathan Baltzell]

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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