Difference between revisions of "March 8, 2013 PID Upgrade"
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# [https://halldweb1.jlab.org/wiki/index.php/File:Pidupgrade3.7.13.pdf Recoil proton] (Justin) | # [https://halldweb1.jlab.org/wiki/index.php/File:Pidupgrade3.7.13.pdf Recoil proton] (Justin) | ||
# AOB | # AOB | ||
| + | |||
| + | |||
| + | == Minutes == | ||
| + | |||
| + | Cherenkov EM Backgrounds: | ||
| + | |||
| + | * Study of EM backgrounds in the forward gas threshold cherenkov | ||
| + | * Pileup EM interactions added in the bggen generator and MC trajectories traced to the detector volume | ||
| + | * Most background electrons at very forward angles (theta < 2) so this region was excluded | ||
| + | * Conclusions: | ||
| + | ** 1 photoelectron threshold vetos ~99% of pions above 3 GeV (Question of what is PMT/electronics noise which may set the lower bound for the threshold, work on for next meeting) | ||
| + | ** 21% of events have a background electron producing cherenkov light in the detector which causes some kaons to be misidentified, but simple to overcome with multiple segments | ||
| + | |||
| + | Recoil Proton: | ||
| + | |||
| + | * Study of eta'(2300) and h'(2600) channels with reconstructed recoil proton compared to previous missing proton analysis | ||
| + | * Significant gains in both channels when the proton is reconstructed with up to S/B ~ 30, but efficiencies may be too low | ||
| + | * For the next 2 weeks the focus will be on completing the analysis of the four channels from last year's PAC proposal with larger statistics | ||
Revision as of 16:18, 9 March 2013
Meeting Time and Place
Friday March 8, 2013 at 1:30pm At Jefferson Lab, the meeting will be held in F326
Connections
To connect from the outside, please use ESNET or SeeVogh
- ) ESNET: 8542553
- ) SeeVogh: A conference has been booked under "GlueX PID Upgrade" from 1:00pm until 3:00pm (EDT).
- ) To phone into an SeeVogh meeting, from the U.S. call (626) 395-2112 and then enter the EVO meeting code, 155025.
- ) To use the SeeVogh Java script use the SeeVogh link.
Agenda
- Announcements
- Cherenkov EM Backgrounds (John)
- Recoil proton (Justin)
- AOB
Minutes
Cherenkov EM Backgrounds:
- Study of EM backgrounds in the forward gas threshold cherenkov
- Pileup EM interactions added in the bggen generator and MC trajectories traced to the detector volume
- Most background electrons at very forward angles (theta < 2) so this region was excluded
- Conclusions:
- 1 photoelectron threshold vetos ~99% of pions above 3 GeV (Question of what is PMT/electronics noise which may set the lower bound for the threshold, work on for next meeting)
- 21% of events have a background electron producing cherenkov light in the detector which causes some kaons to be misidentified, but simple to overcome with multiple segments
Recoil Proton:
- Study of eta'(2300) and h'(2600) channels with reconstructed recoil proton compared to previous missing proton analysis
- Significant gains in both channels when the proton is reconstructed with up to S/B ~ 30, but efficiencies may be too low
- For the next 2 weeks the focus will be on completing the analysis of the four channels from last year's PAC proposal with larger statistics
