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LDMX-Software / ldmx-sw

The Light Dark Matter eXperiment simulation and reconstruction framework.
https://ldmx-software.github.io
GNU General Public License v3.0
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Change trigger threshold defaults #1468

Closed tvami closed 2 months ago

tvami commented 2 months ago

Is your feature request related to a problem? Please describe.

https://github.com/LDMX-Software/ldmx-sw/blob/c1164a4452c210840cec065115b2b3bcecbf62ed/Recon/python/simpleTrigger.py#L43

 self.thresholds = [ self.beamEnergy/4000.*1500.0, self.beamEnergy/4000.*1000. + self.beamEnergy, self.beamEnergy/4000.*500. + 2*self.beamEnergy, self.beamEnergy/4000.*100. + 3*self.beamEnergy ]

leads to 3000, 10000, 17000, 24200, while @EBerzin 's studies lead to different numbers https://indico.fnal.gov/event/64932/#25-multi-electron-trigger-thre (although I think Elizabeth was looking at the 34 layers of ECAL, which is not the same as the one we have )

Describe the solution you'd like

Agree on the final numbers and have them in ldmx-sw. I should add that I strongly believe we should keep the 1e threshold at 3000, so we dont need to redo all the 1e studies (trig skim, BDT, etc), even if it's not fully optimal.

EBerzin commented 2 months ago

I've attached the full set of optimized trigger thresholds (20 and 34 layers for mu = 1 and mu = 2). For 20 ECAL layers, the thresholds are 3.01, 10.79, 18.54, 26.25 GeV. So keeping the 1e threshold at 3000 is consistent with this.

LDMX_TS_Trigger_Thresholds.pdf

tvami commented 2 months ago

Awesome, thanks a lot @EBerzin ! So then next is to figure out how to implement this so it works for both 4 GeV and 8 GeV. Maybe just add an if on the beamEnergy hand have two different lines for self.thresholds as opposed to having it as a function of the energy? Elizabeth do you wanna go ahead with the PR, or should I?

EBerzin commented 2 months ago

I can take of the PR.