Incorrect Vertex when running e- particle gun simulation

iesa khanji

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Oct 27, 2025, 6:32:44 PM (5 days ago) Oct 27

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Hello,

I have been trying to create a particle gun simulation for e-, running it with gluex_MC.py to produce smeared hddm files. Pathway to all that stuff here /w/halld-scshelf2101/home/mkhanji/Masters/JPsi/NNTraining/DSelector/electronGun. That also has my Environment file.

I then have made a plugin to look at some values (pathway /w/halld-scshelf2101/home/mkhanji/Masters/JPsi/NNTraining/DSelector/electronGun/plugin/eminus_particle_gun), and that's where I notice something has gone wrong. The vertex should be at 1 cm, which is what I see for thrown values

Screen Shot 2025-10-27 at 5.42.45 PM.png

But when using extrapolation I get the majority at about 14 cm.

Screen Shot 2025-10-27 at 5.47.26 PM.png

I'm not sure how to go about troubleshooting this and would appreciate any help. I can provide more information as needed.

iesa khanji

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Oct 27, 2025, 6:33:07 PM (5 days ago) Oct 27

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Forgot to mention I'm using run 101582 also.

iesa khanji

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Oct 27, 2025, 6:54:51 PM (5 days ago) Oct 27

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Realized the images didn't likely load. The first image attached is the thrown vertex, the second is the extrapolated.

Screen Shot 2025-10-27 at 6.51.52 PM.png

Screen Shot 2025-10-27 at 6.53.28 PM.png

iesa khanji

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Oct 29, 2025, 11:24:06 AM (4 days ago) Oct 29

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This is the Z DOCA, which I was requested to show during today's meeting.

Screen Shot 2025-10-29 at 11.23.10 AM.png

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