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
   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