Difference between revisions of "Pi0 Polarizability Meeting Dec 6, 2019"
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# Announcements | # Announcements | ||
+ | #* Svetlana and Aleks are in Chile | ||
+ | #* Accelerator is restarting operations | ||
# Action Items | # Action Items | ||
# Theory update | # Theory update | ||
## [[Media:NOTES-JOSE.pdf | Notes Jose 12/6/2019]] | ## [[Media:NOTES-JOSE.pdf | Notes Jose 12/6/2019]] | ||
+ | ##* Update on amplitudes: A and B remain, but amplitude C is zero by current conservation. | ||
+ | ##* Formulation goes back to Morgan and Pennington (1986) using Donahue and Holstein (1992-93) to model A and B. These should be sufficient for simulating the experiment. Specifics involve how to deal with final state interactions and they choose to keep s-channel s-waves and vector mesons in the t and u channels. | ||
+ | ##* Dispersion relation is for P_I(s), which is related to form factors f_0 and f_2. | ||
+ | ##* Parameterization of s-waves is needed. Elton has a reference that he will share with Jose. | ||
+ | ##* Lingyun. He has parameterizations of the partial waves and showed the I=0 S=0 phase shift. Offline discussions with Jose to develop a set to use for this experiment. | ||
# Experiment update | # Experiment update | ||
## Empty target run 51556 (Fall 2018): [https://halldweb.jlab.org/wiki/images/thumb/d/d4/Vertex_2tracks.png/800px-Vertex_2tracks.png], [https://halldweb.jlab.org/wiki/images/thumb/8/86/Vertex_p2pi0.png/800px-Vertex_p2pi0.png], [https://halldweb.jlab.org/wiki/images/thumb/d/d6/Pi0_p2pi0.png/800px-Pi0_p2pi0.png] | ## Empty target run 51556 (Fall 2018): [https://halldweb.jlab.org/wiki/images/thumb/d/d4/Vertex_2tracks.png/800px-Vertex_2tracks.png], [https://halldweb.jlab.org/wiki/images/thumb/8/86/Vertex_p2pi0.png/800px-Vertex_p2pi0.png], [https://halldweb.jlab.org/wiki/images/thumb/d/d6/Pi0_p2pi0.png/800px-Pi0_p2pi0.png] | ||
# Other business | # Other business | ||
# Next meeting | # Next meeting |
Revision as of 12:51, 6 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 -->):
- 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
- (you may need to type this in, depending how you connect)
- If connecting via Web Browser: click this link (no passcode is needed):
- If connecting via iOS or Android App:
- Use your JLab e-mail address to log in and then enter the meeting ID given above to join the meeting
- If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"
- Dial: (408) 740-7256 (US or Canada only)
- 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)
-
Look at gp->pi0pi0 from empty target runs (Alex)See meeting notes - Contact theorists:
-
Lingyun Dai, Hunan University: Changsha, Hunan, CN (dailingyun@hnu.edu.cn)
-
Tentative Agenda
- Announcements
- Action Items
- Theory update
- Experiment update
- Other business
- Next meeting
Minutes
Attending: Elton, Beni, Alex, Jose, Mark, Rory, Phil Martel , Lingyun Dai
- Announcements
- Svetlana and Aleks are in Chile
- Accelerator is restarting operations
- Action Items
- Theory update
- Notes Jose 12/6/2019
- Update on amplitudes: A and B remain, but amplitude C is zero by current conservation.
- Formulation goes back to Morgan and Pennington (1986) using Donahue and Holstein (1992-93) to model A and B. These should be sufficient for simulating the experiment. Specifics involve how to deal with final state interactions and they choose to keep s-channel s-waves and vector mesons in the t and u channels.
- Dispersion relation is for P_I(s), which is related to form factors f_0 and f_2.
- Parameterization of s-waves is needed. Elton has a reference that he will share with Jose.
- Lingyun. He has parameterizations of the partial waves and showed the I=0 S=0 phase shift. Offline discussions with Jose to develop a set to use for this experiment.
- Notes Jose 12/6/2019
- Experiment update
- Other business
- Next meeting