Difference between revisions of "Pi0 Polarizability Meeting Feb 21, 2020"
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= Minutes = | = Minutes = | ||
− | + | ''Attending: Elton, David, Beni, Ilya, Alex, Jose, Mark, Rory | |
# Announcements | # Announcements | ||
Line 71: | Line 71: | ||
# Theory update | # Theory update | ||
#* [[Media:NOTES-JOSE Feb21 2020.pdf | Jose's notes]] | #* [[Media:NOTES-JOSE Feb21 2020.pdf | Jose's notes]] | ||
+ | #* Determined stable cross section for S-wave only. D-wave components are needed to match the BELLE data (to higher energy). But no satisfactory match is made. | ||
+ | #* The cross section is extracted for Mpipi < 0.8 GeV. The table was circulated. | ||
# Experiment update | # Experiment update | ||
#* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4360 Update] (Elton) | #* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4360 Update] (Elton) | ||
+ | #* Rory: phenomenology for single pi0 is well developed. He will check on references and make them available. Increased absorption is expected from two pi0s. | ||
# Work list for the draft proposal to collaboration | # Work list for the draft proposal to collaboration | ||
#* Clarification to questions from the PAC where possible | #* Clarification to questions from the PAC where possible | ||
− | #* Update to theory section | + | #* Update to theory section (Jose and Mark) |
#* Sensitivity of cross section to polarizabilities | #* Sensitivity of cross section to polarizabilities | ||
− | #* Initial optimization of experiment | + | #** Jose: The sensitivity is determined by extrapolating into the kinematic region for polarizabilities and will take effort. For now, we will use the estimates from Dai/Pennington. |
− | #** | + | #* Initial optimization of experiment (e.g. target position) |
− | #* Analysis of PRIMEX data | + | #** This item will not be attempted for the proposal draft. |
− | #* Assessment of nuclear coherent background | + | #* Analysis of PRIMEX data (Ilya) |
+ | #* Assessment of nuclear coherent background (Elton) | ||
#** What is the t-dependence of the sigma (500)? | #** What is the t-dependence of the sigma (500)? | ||
# Other business | # Other business | ||
# Next meeting | # Next meeting | ||
+ | #* Friday Feb 28, 10 am |
Latest revision as of 12:41, 21 February 2020
Contents
Meeting Information
Meeting Time And Location
10:00 am ET (JLab time)
CC F228
Connecting
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Action Items
- ChiPT calculation to one loop with Coulomb photon (Svetlana and Aleks)
- Create a NPP mail list (Mark)
Tentative Agenda
- Announcements
- Action Items
- Theory update
- Experiment update
- Update (Elton)
- Work list for the draft proposal to collaboration
- Clarification to questions from the PAC where possible
- Update to theory section
- Sensitivity of cross section to polarizabilities
- Initial optimization of experiment
- target position
- Analysis of PRIMEX data
- Assessment of nuclear coherent background
- What is the t-dependence of the sigma (500)?
- Other business
- Next meeting
Minutes
Attending: Elton, David, Beni, Ilya, Alex, Jose, Mark, Rory
- Announcements
- Action Items
- Theory update
- Jose's notes
- Determined stable cross section for S-wave only. D-wave components are needed to match the BELLE data (to higher energy). But no satisfactory match is made.
- The cross section is extracted for Mpipi < 0.8 GeV. The table was circulated.
- Experiment update
- Update (Elton)
- Rory: phenomenology for single pi0 is well developed. He will check on references and make them available. Increased absorption is expected from two pi0s.
- Work list for the draft proposal to collaboration
- Clarification to questions from the PAC where possible
- Update to theory section (Jose and Mark)
- Sensitivity of cross section to polarizabilities
- Jose: The sensitivity is determined by extrapolating into the kinematic region for polarizabilities and will take effort. For now, we will use the estimates from Dai/Pennington.
- Initial optimization of experiment (e.g. target position)
- This item will not be attempted for the proposal draft.
- Analysis of PRIMEX data (Ilya)
- Assessment of nuclear coherent background (Elton)
- What is the t-dependence of the sigma (500)?
- Other business
- Next meeting
- Friday Feb 28, 10 am