Dear Snowmass Colleagues, The 2021 Snowmass Community Planning Exercise has now concluded with the sharing of our final report with the community. It has also been made available to the Particle Physics Project Prioritization Panel, also known as P5 and the National Academy Study, Elementary Particle Physics: Progress and Promise, a.k.a. EPP-2024

You can access the final report, topical group reports, whitepapers, and other material at Snowmass Proceedings

Overall timeline of reports including Topical Group reports, Frontier Reports, and Full Reports

• See HERE.

1. Snowmass Summary for the Public (2 pages) [audience: everyone]

• With help of Kathryn Jepsen, Editor-in-Chief, Symmetry magazine

2. Snowmass Summary Report (~50 pages) [audience: Snowmass community, science community, funding agencies]

1. Executive Summary: ~10 pages
2. Introduction
3. 10 Frontier Executive Summaries (a few pages per Frontier)
4. Executive Summaries of Multi-Frontier Topics
5. Conclusion

3. Snowmass Book (~500 pages) [audience: Snowmass community + P5 Committee] (see Snowmass 2013 Report)

1. Snowmass Summary Report (~50 pages)
2. Frontier Summaries (< 50 pages per Frontier)
3. Multi-Frontier Topic Summaries (~10 pages per Topic)

4. Reports of Ten Frontiers [audience: Frontiers & Topical Groups] - web based (see Snowmass 2013 webpage)

• Each Frontier Summary: < 50 pages
• Topical Group Reports (some groups could be combined): < a few tens of pages per report

5. Reports of Multi-Frontier Topics [audience: Frontiers & Topical Groups]

• Each Multi-Frontier Topic Summary: ~10 page
• Multi-Frontier Topics are topics spanning multiple Frontiers such as Dark Matter and Quantum Science.

6. Contributed Papers

• Contribute papers (or known as “white papers”) are contributions by the community and will be used as input to the frontier and topical group reports. See the submission procedure here.
• Because the submission deadline is after the deadline of preliminary subgroup and frontier reports, authors should communicate with relevant TG conveners about key elements of their paper some months before the submission deadline. Each Frontier will provide guidelines to their community about the communication process.