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Hi,
I found my old talk with the proof-of-principle energy estimator. It was in Dec. 2021 (!!):
https://indico.fnal.gov/event/52371/
On the slides (p. 11) it looks like I claim 3% muon energy
resolution around Emu=1 GeV, though the plot there suggests 4% is
maybe a fairer number to quote. It's also worth recognizing that
this number is a fairly strong function of the true neutrino
energy because of track reconstruction/PID inefficiency (at the
low end) and containment issues (at the high end). (The slides
also reminded me that at the time I didn't make any effort to use
the actual PID GNN, but rather just used track length as a muon
PID, which worked ~ok. Using the actual PID algorithm should
recover many of the ones I lost at low Emu due to my very crude
muon selection.)
-Jeremy