Difference between revisions of "Pi0 Polarizability Meeting Jun 5, 2020"
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== Action Items == | == Action Items == | ||
# ChiPT calculation to one loop with Coulomb photon (Svetlana and Aleks) | # ChiPT calculation to one loop with Coulomb photon (Svetlana and Aleks) | ||
+ | # BGGEN simulations of incoherent backgrounds (Mark) | ||
# Simulate (broken) eta's with more realistic production model (Elton) | # Simulate (broken) eta's with more realistic production model (Elton) | ||
Line 49: | Line 50: | ||
# Action Items | # Action Items | ||
# Feedback from collaboration review | # Feedback from collaboration review | ||
− | |||
# Theory update | # Theory update | ||
# Collaboration draft | # Collaboration draft | ||
Line 56: | Line 56: | ||
##* BGGEN (PYTHIA) | ##* BGGEN (PYTHIA) | ||
##* More realistic eta production? | ##* More realistic eta production? | ||
+ | ##**[https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4523 Broken Etas2] (Elton) | ||
## Experiment optimization | ## Experiment optimization | ||
## Significance of experiment | ## Significance of experiment | ||
Line 61: | Line 62: | ||
## Analysis of PRIMEX data | ## Analysis of PRIMEX data | ||
# Other business | # Other business | ||
− | |||
# Next meeting | # Next meeting | ||
= Minutes = | = Minutes = | ||
− | ''Attending: | + | ''Attending: Mark, Rory, Beni, Alex, Ilya |
+ | |||
+ | # Announcements | ||
+ | #* JLab proceeding to Medcon5 on Monday | ||
+ | # Action Items | ||
+ | # Feedback from collaboration review | ||
+ | #* Reinhard sent out an announcement to the collaboration to comment on the NPP draft. Comments expected back at the end of June and a vote will follow | ||
+ | # Theory update | ||
+ | #* Ilya is in communication with Serguei who promises formulas updates soon. | ||
+ | # Collaboration draft | ||
+ | ## Backgrounds | ||
+ | ##* BGGEN (PYTHIA) | ||
+ | ##** No results yet | ||
+ | ##* More realistic eta production? | ||
+ | ##** [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4523 Broken Etas2] (Elton) | ||
+ | ##** A new event generator gen_EtaPb currently simulates the NC production of etas. They are decayed using geant4. | ||
+ | ##** Distributions from this generator were presented. They show that the theta_pipi scattering angle peaks at lower angles, beginning at the angle for NC pi0pi0 production. | ||
+ | ##** The normalization was investigated comparing results to Rory's discussion in the appendix draft. | ||
+ | ##** Elton will evaluate the normalization for both Primakoff and NC eta production for the next meeting | ||
+ | ## Experiment optimization | ||
+ | ## Significance of experiment | ||
+ | ##* [https://halldweb.jlab.org/doc-public/DocDB/ShowDocument?docid=4373 Proposal Draft] | ||
+ | ## Analysis of PRIMEX data | ||
+ | # Other business | ||
+ | ## Evaluation of eta backgrounds (Beni) | ||
+ | ##* Beni generated 100k eta's at 6 GeV and at zero angle. | ||
+ | ##* The etas were decayed to 3pi0 using hdgeant and reconstructed using standard analysis | ||
+ | ##* The distributions provide nice intuition as to how this background might contaminate our signal. | ||
+ | ##* A good rule-of-thumb is that 1/200 etas will reconstruct to a 2pi0 final state with energy or 6 GeV, i.e. look like our signal. | ||
+ | # Next meeting | ||
+ | #* Friday June 12 at 10 am. |
Latest revision as of 13:39, 5 June 2020
Contents
Meeting Information
Meeting Time And Location
10:00 am ET (JLab time)
REMOTE
Connecting
You can connect using BlueJeans Video conferencing (ID: 949 429 419). (Click "Expand" to the right for details -->):
- Make sure you have created a BlueJeans account via your JLab CUE account using this link:
- http://jlab.bluejeans.com (You should only need to do this once)
- Meeting ID: 949 429 419
- (you may need to type this in, depending how you connect)
- If connecting via Web Browser: click this link (no passcode is needed):
- If connecting via iOS or Android App:
- Use your JLab e-mail address to log in and then enter the meeting ID given above to join the meeting
- If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"
- Dial: (408) 740-7256 (US or Canada only)
- or, List of International Numbers
- If connecting via Polycom unit:
- Dial 199.48.152.152 or bjn.vc
- Enter meeting ID above
Action Items
- ChiPT calculation to one loop with Coulomb photon (Svetlana and Aleks)
- BGGEN simulations of incoherent backgrounds (Mark)
- Simulate (broken) eta's with more realistic production model (Elton)
Tentative Agenda
- Announcements
- Action Items
- Feedback from collaboration review
- Theory update
- Collaboration draft
- Backgrounds
- npp_analysis (Mark)
- BGGEN (PYTHIA)
- More realistic eta production?
- Broken Etas2 (Elton)
- Experiment optimization
- Significance of experiment
- Analysis of PRIMEX data
- Backgrounds
- Other business
- Next meeting
Minutes
Attending: Mark, Rory, Beni, Alex, Ilya
- Announcements
- JLab proceeding to Medcon5 on Monday
- Action Items
- Feedback from collaboration review
- Reinhard sent out an announcement to the collaboration to comment on the NPP draft. Comments expected back at the end of June and a vote will follow
- Theory update
- Ilya is in communication with Serguei who promises formulas updates soon.
- Collaboration draft
- Backgrounds
- BGGEN (PYTHIA)
- No results yet
- More realistic eta production?
- Broken Etas2 (Elton)
- A new event generator gen_EtaPb currently simulates the NC production of etas. They are decayed using geant4.
- Distributions from this generator were presented. They show that the theta_pipi scattering angle peaks at lower angles, beginning at the angle for NC pi0pi0 production.
- The normalization was investigated comparing results to Rory's discussion in the appendix draft.
- Elton will evaluate the normalization for both Primakoff and NC eta production for the next meeting
- BGGEN (PYTHIA)
- Experiment optimization
- Significance of experiment
- Analysis of PRIMEX data
- Backgrounds
- Other business
- Evaluation of eta backgrounds (Beni)
- Beni generated 100k eta's at 6 GeV and at zero angle.
- The etas were decayed to 3pi0 using hdgeant and reconstructed using standard analysis
- The distributions provide nice intuition as to how this background might contaminate our signal.
- A good rule-of-thumb is that 1/200 etas will reconstruct to a 2pi0 final state with energy or 6 GeV, i.e. look like our signal.
- Evaluation of eta backgrounds (Beni)
- Next meeting
- Friday June 12 at 10 am.