Difference between revisions of "Pi0 Polarizability Meeting Mar 6, 2020"
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= Minutes = | = Minutes = | ||
+ | Note: I am writing these notes from memory without good notes and memory might not be accurate. | ||
+ | ''Attending: Jose, Mark, Elton, Alex, | ||
+ | |||
+ | == Tentative Agenda == | ||
+ | # Announcements | ||
+ | #* Goal is to have a all input to the draft proposal by next Wednesday so it can be reviewed and submitted by next Friday. | ||
+ | # Action Items | ||
+ | # Theory update | ||
+ | #* Update to theory section of proposal. Expect to have a draft of an appendix with more details by next Wed. | ||
+ | # Experiment update | ||
+ | #* Ilya: Using single pi0 Coulomb FF to estimate cross sections for 2pi0. Replace longitudinal momentum transfer qL ~ mpi -> 2mpi, and scattering of pi0 in final state -> 2x scattering for 2 pi0. | ||
+ | #* Calculate FF show oscillations that require increased precision and Ilya has increased granularity and computing time. Glauber calculation includes final-state absorption and computes real and imaginary part of FF. | ||
+ | #* Evaluating photon flux for the Primex-eta run so that preliminary cross sections can be produced. | ||
+ | #* Elton: Showed angular distribution for Primex and nuclear coherent components. No clear distinction between components is seen in the combined angular distribution. | ||
+ | #* Rory: We should take a look at light nuclei and see how the angular distribution changes. | ||
+ | # 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)? | ||
+ | # [[Media:NPP Theory Appendix.pdf|Theory Appendix from Jose]] | ||
+ | # Other business | ||
+ | # Next meeting |
Revision as of 14:30, 12 March 2020
Contents
Meeting Information
Meeting Time And Location
10:00 am ET (JLab time)
CC F228
Connecting
You can connect using BlueJeans Video conferencing (ID: 949 429 419). (Click "Expand" to the right for details -->):
- Make sure you have created a BlueJeans account via your JLab CUE account using this link:
- http://jlab.bluejeans.com (You should only need to do this once)
- Meeting ID: 949 429 419
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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)
Tentative Agenda
- Announcements
- Action Items
- Theory update
- Experiment update
- 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)?
- Theory Appendix from Jose
- Other business
- Next meeting
Minutes
Note: I am writing these notes from memory without good notes and memory might not be accurate. Attending: Jose, Mark, Elton, Alex,
Tentative Agenda
- Announcements
- Goal is to have a all input to the draft proposal by next Wednesday so it can be reviewed and submitted by next Friday.
- Action Items
- Theory update
- Update to theory section of proposal. Expect to have a draft of an appendix with more details by next Wed.
- Experiment update
- Ilya: Using single pi0 Coulomb FF to estimate cross sections for 2pi0. Replace longitudinal momentum transfer qL ~ mpi -> 2mpi, and scattering of pi0 in final state -> 2x scattering for 2 pi0.
- Calculate FF show oscillations that require increased precision and Ilya has increased granularity and computing time. Glauber calculation includes final-state absorption and computes real and imaginary part of FF.
- Evaluating photon flux for the Primex-eta run so that preliminary cross sections can be produced.
- Elton: Showed angular distribution for Primex and nuclear coherent components. No clear distinction between components is seen in the combined angular distribution.
- Rory: We should take a look at light nuclei and see how the angular distribution changes.
- 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)?
- Theory Appendix from Jose
- Other business
- Next meeting