Pi0 Polarizability Meeting Feb 21, 2020
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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