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

The Snowmass Steering Group thanks all the Frontier Conveners, Topical Group Conveners, Advisory Group members, and members of the DPF Executive Committee for their efforts to make Snowmass 2021 a success and especially the many members of the HEP and associated communities, US and international, for the many incisive studies that contributed to the Snowmass vision.

On behalf of the Snowmass Steering Group: Joel Butler, Sekhar Chivukula, Andre de Gouvea, Tao Han, Young-Kee Kim, Priscilla Cushman, Glennys Farrar, Yury Kolomensky, Sergei Nagaitsev, Nicolas Yunes.

The Snowmass Community Planning Exercise, which was delayed in January 2021 due to the COVID-19 pandemic, resumed full activity in September 2021. It will culminate in July with the Community Summer Study Workshop. For details and updates, please see the announcement at https://atlaswww.hep.anl.gov/snowmass21/doku.php?id=announcements. The ongoing activities and updates from the individual frontiers can be found on their frontier Wiki pages. We encourage you to participate in the activity by signing up to the research frontiers at their Wiki pages, accessible from the side menu if you haven’t already done so.

The Particle Physics Community Planning Exercise (a.k.a. “Snowmass”) is organized by the Division of Particles and Fields (DPF) of the American Physical Society. Snowmass is a scientific study. It provides an opportunity for the entire particle physics community to come together to identify and document a scientific vision for the future of particle physics in the U.S. and its international partners. Snowmass will define the most important questions for the field of particle physics and identify promising opportunities to address them. (Learn more about the history and spirit of Snowmass here "How to Snowmass" written by Chris Quigg). The P5, Particle Physics Project Prioritization Panel, will take the scientific input from Snowmass and develop a strategic plan for U.S. particle physics that can be executed over a 10 year timescale, in the context of a 20-year global vision for the field.

We aim for everyone's voice to be heard. Your contributions and participation are critical for the success of Snowmass and they will naturally occur as part of one or more working groups directed by the conveners. There will be various Town Hall meetings for us to communicate with you and to receive your feedback. You are also welcome to provide input and suggestions on the Slack channel (https://snowmass2021.slack.com/). This Snowmass wiki provides news and announcements and has pages dedicated to each frontier. Agendas and presentations of all Snowmass-related meetings are available via this Snowmass Indico link.

We are now approaching the final stages of this process. More than 500 white papers have been produced describing the many investigations that have been performed as part of the Snowmass study. These are being summarized in the reports of our approximately 80 topical subgroups. Our community is now preparing to come together in a Community Summer Study (CSS) hosted by a 10-day-long workshop hosted by the University of Washington in Seattle from July 16-27. Details of the CSS, which is a hybrid meeting that we urge you to attend in person if you can do so safely, can be found on the "Seattle Workshop Home Page.

Sincerely,

Joel Butler (DPF Chair), Sekhar Chivukula (DPF Chair-Elect), Andre de Gouvea (DPF Vice-Chair), Tao Han (DPF Past Chair), Young-Kee Kim (DPF recent Past Chair), Priscilla Cushman (DPF recent Past Chair)

Glennys Farrar (DAP Rep), Nicolas Yunes (DGRAV Rep), Yury Kolomensky (DNP Rep), Sergei Nagaitsev (DPB Rep)

see Announcements tab on the sidebar for a complete list

To get all of the frontiers and participants back together on a new starting point, regain our momentum and refocus our attention to the Snowmass activities, we hosted a half-day zoom meeting: the “Snowmass Day”, on September 24, 2021, for all frontiers to lay out their plans going forward. The meeting agenda consisted of:

Plenary: 2 hours, 12:00pm - 2:00pm EDT. Short presentations from all frontiers (plus Snowmass Early Career and Steering Group), that laid out the frontier’s plans for the upcoming activities.

Breakout sessions: 2:30pm EDT. This provided the opportunity for each frontier to discuss its status and future plans in detail and to conduct cross-talk and interconnections with other frontiers. The sessions were especially intended to help those who were reconnecting to the Snowmass process after the long pause. The length of the breakout sessions was tailored to each frontier’s needs.

The dates for the Snowmass Community Summer Study (CSS) to be held the University of Washington-Seattle have been fixed at July 17-27, 2022.

Community-wide meetings and workshops include

• Snowmass Kick-off Town-Hall meeting (virtual): April 18, 2020 (during the 2020 APS April Meeting)
• Snowmass Community Planning Meeting (virtual): October 5-8, 2020 - Goals, Program, Presentations, and Recordings. (wiki page for CPM Program Committee)
• Snowmass Summer Study: July 2022 at UW Seattle

Various Frontier-level and Topical-group-level workshops have been organized by Conveners since April 2020 and these will continue through Spring 2022. Originally scheduled frontier-level Spring 2021 workshops will be moved to later times.

Workshop locations will be chosen to maximize “inclusiveness” based on accessibility and economic consideration. For all the meetings and workshops, we will make sure that we are inclusive to those who participate remotely and we will have a special session to discuss APS efforts for openness and the importance of open international collaboration.

The ten Frontiers are led by Frontier Conveners who have been nominated by the community and selected by the DPF Executive Committee plus members of the chair lines of the Division of Astrophysics (DAP), Division of Physics of Beams (DPB), Division of Nuclear Physics (DNP) and Division of Gravitational Physics (DGRAV). Each of the Frontier conveners has chosen topical group conveners, drawing heavily from the original nomination list. This process was developed in order to provide a diverse and representative leadership including junior and senior researchers, theorists, and experimentalists, and balance regarding gender, geographical distribution, and background.

The Steering Group oversees the process and meets regularly with the Frontier Conveners. The Steering Group consists of the DPF Chair line and one representative of each of the related units DAP, DPB, DNP, and DGRAV ([email protected]). The 2022 Steering Group members are Joel Butler (Chair, DPF), Sekhar Chivukula (DPF), Priscilla Cushman (DPF), Andre de Gouvea (DPF), Glennys Farrar (DAP), Tao Han (DPF), Young-Kee Kim (DPF), Yury Kolomensky (DNP), Sergei Nagaitsev (DPB), Nicolas Yunes (DGRAV).

An inclusive Advisory Group is consulted on major decisions and consists of the Steering Group plus the rest of the DPF Executive Committee (members at large, secretary/treasurer, and councilor), an editor, a communication liaison, and a set of International Advisors.

As an APS-sponsored process, we will abide by the APS code of conduct for all meetings. This wiki is also part of the process, so in our conversations here we pledge to conduct ourselves in a professional manner that is welcoming to all participants and free from any form of discrimination, harassment, or retaliation. Participants will treat each other with respect and consideration.

In addition, DPF has drafted a set of Core Principles and Community Guidelines to which members pledge to adhere. Please see the wiki page for more information.

Questions about the Snowmass process should be directed to: snowmass-communication[AT]fnal.gov. The Technical Liaison addresses questions on technical support and advice, content and format of this wiki. Questions should be directed to: snowmass-admin[AT]fnal.gov with subject line: “snowmass technical help” so we don't lose it!

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To: listservATfnal.gov

From: rhbobATfnal.gov

Subject:

—-whatever delineates the body field—-

SUBSCRIBE SNOWMASS ROBERT BERNSTEIN

——and (without this line) just send it!

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