Difference between revisions of "Pi0 Polarizability Meeting Dec 20, 2019"
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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) | ||
− | # Formulate questions for Serguei (Elton and Ilya) | + | # <strike> Formulate questions for Serguei (Elton and Ilya) </strike> Ask Sergey to calculate nuclear coherent sigma production on lead. |
− | # Specify s-wave parameterization (Elton and Lingyun) | + | # <strike> Specify s-wave parameterization (Elton and Lingyun) </strike> Elton passed references to a limited parameterization; Lingyun has been copied on e-mails. |
== Tentative Agenda == | == Tentative Agenda == | ||
Line 57: | Line 57: | ||
=Minutes= | =Minutes= | ||
− | ''Attending: | + | ''Attending: Elton, Jose, Rory, Mark |
+ | |||
+ | # Announcements | ||
+ | #* Accelerator is shutting down this evening. No beam since yesterday swing. The accelerator will be manned over the holiday and they expect a quick start in Jan. | ||
+ | # Action Items | ||
+ | #* Questions to Sergey | ||
+ | #* We decided that the main request to Sergey is to ask if he can calculate the coherent sigma production on lead. This includes final state interactions (FSI) of the two pions. | ||
+ | #* Rory: This calculation should be doable for Sergey given he machinery he has developed for pi0 Primakoff. | ||
+ | #* Elton: In particular the t dependence of this reaction would be useful. | ||
+ | #* Jose: The calculation should be similar for the charged pion production also. Both involve strong production of two pions although FSI may be different. | ||
+ | # Theory update | ||
+ | #* [[Media:NOTES-JOSE Dec19 2019.pdf | Jose's Notes Dec 19 2019]] | ||
+ | #* Recall: There are two Compton Tensors A and B (C does not contribute) | ||
+ | #* Use the model by Holstein and Donahue to calculate f0 and f2 form factors that determine A and B | ||
+ | #* f0 and f2 are determined by the s-wave phase shifts. Uses parameterization of Gasser, Leutweiler and Colangelo. | ||
+ | #* The phase shifts are well known to about | ||
+ | # Experiment update | ||
+ | # Other business | ||
+ | # Next meeting |
Revision as of 15:19, 20 December 2019
Contents
Meeting Information
Meeting Time And Location
10:00 am ET (JLab time)
CC F228
Connecting
Dummy for now: You can connect using BlueJeans Video conferencing (ID: 949 429 419). (Click "Expand" to the right for details -->):
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- 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)
-
Formulate questions for Serguei (Elton and Ilya)Ask Sergey to calculate nuclear coherent sigma production on lead. -
Specify s-wave parameterization (Elton and Lingyun)Elton passed references to a limited parameterization; Lingyun has been copied on e-mails.
Tentative Agenda
- Announcements
- Action Items
- Theory update
- Experiment update
- Other business
- Next meeting
Minutes
Attending: Elton, Jose, Rory, Mark
- Announcements
- Accelerator is shutting down this evening. No beam since yesterday swing. The accelerator will be manned over the holiday and they expect a quick start in Jan.
- Action Items
- Questions to Sergey
- We decided that the main request to Sergey is to ask if he can calculate the coherent sigma production on lead. This includes final state interactions (FSI) of the two pions.
- Rory: This calculation should be doable for Sergey given he machinery he has developed for pi0 Primakoff.
- Elton: In particular the t dependence of this reaction would be useful.
- Jose: The calculation should be similar for the charged pion production also. Both involve strong production of two pions although FSI may be different.
- Theory update
- Jose's Notes Dec 19 2019
- Recall: There are two Compton Tensors A and B (C does not contribute)
- Use the model by Holstein and Donahue to calculate f0 and f2 form factors that determine A and B
- f0 and f2 are determined by the s-wave phase shifts. Uses parameterization of Gasser, Leutweiler and Colangelo.
- The phase shifts are well known to about
- Experiment update
- Other business
- Next meeting