Pi0 Polarizability Meeting Aug 30, 2019

Meeting Information

Meeting Time And Location

10:00 am ET (JLab time)

CC F228

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Action Items

1. Contact Dai regarding the pi0pi0 proposal (Elton).

Tentative Agenda

1. Announcements
   • Wiki pages moved to open repository
2. Action Items
   1. Lingyun Dai, Hunan University: Changsha, Hunan, CN (dailingyun@hnu.edu.cn)
3. PAC 47
   1. TAC Physics Comments
      • One-pion exchange contribution (C-parity conservation?)
      • Eliminating contributions from iso-scalar resonances (experiment)
      • Sensitivity of cross sections to polarizability (theory)
      • Corrections due to photon virtuality (theory)
   2. email from Elton and Mark to PAC Reviewer Steve Dytman. Homework to prepare for a proposal (Questions not answered by the LOI):
      • So far we have only qualitatively investigated backgrounds, but do not find any particular reactions that have not been considered for pi0 and pi+pi- Primakoff reactions. Detailed studies needed.
      • Determine how backgrounds will affect the determination of the pi0pi0 Primakoff cross section.
      • Evaluate sensitivity to run time. Need to justify requested beam time.
      • Develop the case for measuring pi0pi0 production at threshold aside from the determination of the polarizability.
   3. PAC47 Report
4. Other business
5. Next meeting

Minutes

Attending: David, Elton, Jose, Ilya, Beni, Mark (JLab); Rory (UConn); Svetlana, Aleks (MU)

1. Announcements
   • Wiki pages moved to open repository
2. Action Items
   1. Lingyun Dai, Hunan University: Changsha, Hunan, CN (dailingyun@hnu.edu.cn)
3. PAC 47
4. TAC Physics Comments
   1. One-pion exchange contribution (C-parity conservation?)
   2. Eliminating contributions from iso-scalar resonances (experiment)
   3. Sensitivity of cross sections to polarizability (theory)
   4. Corrections due to photon virtuality (theory)
5. email from Elton and Mark to PAC Reviewer Steve Dytman. Homework to prepare for a proposal (Questions not answered by the LOI):
   1. So far we have only qualitatively investigated backgrounds, but do not find any particular reactions that have not been considered for pi0 and pi+pi- Primakoff reactions. Detailed studies needed.
   2. Determine how backgrounds will affect the determination of the pi0pi0 Primakoff cross section.
   3. Evaluate sensitivity to run time. Need to justify requested beam time.
   4. Develop the case for measuring pi0pi0 production at threshold aside from the determination of the polarizability.
6. PAC47 Report
7. Other business
8. Next meeting