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EbyE T0 for production_4p59GeV_fixedTarget_2019
Updated on Wed, 2024-05-29 13:40. Originally created by genevb on 2024-05-29 09:15.
Following up on my blog post from last year (Looking into event-by-event T0 in FXT), which looked at Run 19 3.85 GeV FXT, I calibrated here Run 19 4.59 GeV FXT. I again found that Irakli's method had the same flaws:
The EPD and VPD show the narrowest peaks after correction, while the BBC shows the most complete coverage of having a real signal in each event. So the BBC is used as the final fallback option after EPD and VPD are tried first:
Option 1: 0.01683 - 1.664e-05*epde (covers ~80% of events)
Option 2: 0.02853 - 1.711e-05*vpde (brings up to 92%)
Option 3: 0.02298 - 1.620e-05*bbce (brings up to 99.9%)
-Gene
- For roughly ~10% of events, the EPD west had a higher Max TAC than EPD east and was used for the T0
- For another ~10% of events, the EPD east had a value of 0 that was considered valid and was used for the T0
EPD east | VPD east | BBC east | |
---|---|---|---|
Distribution of ptime vs. Max TAC for non-zero ptime and Max TAC |
|||
Spread profile with fit (errors on the mean are much smaller) |
|||
Fit of ptime peak |
|||
Fit of ptime peak after slope correction |
The EPD and VPD show the narrowest peaks after correction, while the BBC shows the most complete coverage of having a real signal in each event. So the BBC is used as the final fallback option after EPD and VPD are tried first:
Option 1: 0.01683 - 1.664e-05*epde (covers ~80% of events)
Option 2: 0.02853 - 1.711e-05*vpde (brings up to 92%)
Option 3: 0.02298 - 1.620e-05*bbce (brings up to 99.9%)
-Gene
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