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The European Strategy Group (ESG) process has nearly completed. The next major decadal strategy effort is the US Snowmass process, which will be followed by P5 panel recommendations, which in turn will guide funding and resource decisions.
The first issue milestone for the US Snowmass process is was the submission of short 2-page LOI's by Aug 30th and longer documents before summer of next year (2021). on Aug 31st, 2020. Longer "White-Paper" documents are now due by January 2022. These White-Papers may update or go beyond the content of the Belle II Physics Book https://arxiv.org/abs/1808.10567 and/or may also discuss technical aspects of SuperKEKB accelerator and Belle II detector upgrades.
Detailed scientific discussions will take place during the next year and a half. A large close-out meeting is planned in Seattle, WA in but deferred to the summer of 2021.
The following draft LOIs have been prepared 2022 due to the pandemic. Participation of all international Belle II colleagues and especially junior colleagues is strongly encouraged in this high energy physics community process. Contributions from theoretical colleagues are also welcomed. Belle II colleagues are encouraged to join the Snowmass topical groups.
N.B. Some of the original deadlines have been revised due to the pandemic (White Papers→Jan 2022, Closeout →Summer 2022)
Talks at meetings/workshops
- May 20, 2020 - EF06 Kick-off meeting: Summary of proposed Belle II activities: Charmonium, Bottomonium, and XYZ states, Bryan Fulsom
- Jun 24, 2020 - EF06 Topical Group Meeting: Belle II Overview (Hadron Spectroscopy), Bryan Fulsom
- Jul 10, 2020 - Preparatory Joint Sessions on Open Questions and New Ideas - Hadron Spectroscopy (includes Belle II), Bryan Fulsom
- Jul 23, 2020 – RF5 Workshop CLFV - Tau Decays and Transitions
- Tau LFV decays at Belle II, Swagato Banerjee
- Sep 23, 2020 - RF07 Workshop: Bottomonium (Experimental, includes Belle II), Todd Pedlar
- Sep 28-29, 2020 – RF1/5 Workshop Lepton flavor violation and lepton universality violation in meson and baryon decays
- LFV+LFU in neutral-current b/c decays at Belle II, Karim Trabelsi
- LFU in charged-current b decays at Belle II, Florian Bernlochner
- Oct 2, 2020 – RF Town Hall meeting
- Physics prospects of Belle II, Soeren Prell
- CKM measurements and CPV in b decays at Belle II, Alessandro Gaz
- Rare b decays at Belle II, Alan Schwartz
- Charm physics at Belle II, Jake Bennett
- Hadron Spectroscopy at Belle II, Bryan Fulsom
Long-lived particles at Belle II, Susanne Westhoff
- Dark sector studies at Belle II, Kevin Flood
- CLFV in tau decays, Swagato Banerjee
- Oct 6, 2020 – AF5 organization with contributors
- Upgrades of SuperKEKB/Belle II, Tom Browder
Precision Electroweak Physics with Polarized Beams at SuperKEKB/Belle II, Michael Roney
Letters of interest
The following LOIs have been prepared and submitted for Belle II:
1. Belle II/SuperKEKB upgrades and overview
Coordinator: Tom Browder (teb@phys.hawaii.edu)
Final version:
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Almost final draft, needs topical group code for Computation Frontier which was missing from the Comp Frontier LOI: B2_LOI_AlanSchwartzTemplate-Upgrades.pdf
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2. B physics at Belle II
Coordinator: Soeren Prell (prell@iastate.edu)
Draft 2.0 (textual changes)
Draft 3.0 (final) - changed cover page to common format, edits addressing comments from Alan, Kevin, and Tom
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Final version:
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3. Dark Sector Studies at Belle II
Coordinators: Chris Hearty (hearty@physics.ubc.ca), Kevin Flood (kflood@hawaii.edu)
Draft V3: add dark photon search to pi+ pi- final state
Draft V4: add paragraph on long-lived particles
Draft V5: add paragraph on sterile neutrinos in tau decay
B2_LOI_AlanSchwartzTemplate-DarkSector-Final.pdf: uses Alan's Charm LOI as a title page template; has final author list; edits suggested by final reader (Soeren)
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Final version:
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4. Charm Physics at Belle II
Coordinator: Alan Schwartz (alan.j.schwartz@uc.edu)
Draft v2 (added text in red)
Draft v3 (added text in red)
Draft v4 (added text in blue)
Draft v4 (no colors)
Draft v5 (final) (LaTex) (author-usbelle2.tex)
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Final version:
View file name Snowmass_BelleII_charm_LOI.pdf height 250
5. Tau Physics and Precision Electroweak Physics with Polarized beams at SuperKEKB/Belle II
Coordinator: Swagato Banerjee (swagato.banerjee@louisville.edu)Evolving Overleaf draft (
Final version:
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6. Hadron Spectroscopy at Belle II
Coordinator: Bryan Fulsom (bryan.fulsom@pnnl.gov)Evolving Overleaf draft (
Final version:
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7. Belle II/SuperKEKB capabilities for QCD
Coordinator: Anselm Vossen (anselm.vossen@duke.edu)Evolving Overleaf draft (
Final version:
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8. Belle II detector upgrades (plans for the instrumentation frontier)
Coordinator: Sven Vahsen ( Sven Einar Vahsen)
Draft 1.0: Belle2_Snowmass_Instrumentation_LOI_v1.pdf
Draft 2.0: Belle2_Snowmass_Instrumentation_LOI_v2.pdf (text edits, cleaned up VXD part of summary table)
Draft 3.0: Final version:
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Evolving Overleaf draft (view-only link)
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9. Belle II plans for the computing frontier
Coordinator: Jake Bennett (jvbennet@olemiss.edu)
Evolving overleaf draft (Final version:
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