ESPPU Drafting Day

Thursday 9 Jan 2025, 10:00 → 17:00 Europe/London

Jim Clarke (STFC Daresbury Laboratory), Matthew Wing, Ruben Saakyan (UCL), Sarah Williams (University of Cambridge)

The second drafting day for the UK's national input to the ESPP will take place at UCL, and a zoom connection will be available to faciliate hybrid participation. In order to finalise catering we request that those attending in person register by noon on 18th December.

This follows the first drafting day which took place at Daresbury laboratory on 4th November: https://conference.ippp.dur.ac.uk/event/1391/ 

The following google doc:

https://docs.google.com/document/d/1qByRWtqo2PL7P5Q3VCMgGj_5jNfmga5eyJWVk78WgSI/edit?usp=sharing

is now open for the community to provide comments/input ahead of the drafting day)

The meeting will be held in the Darwin LT room B40 in the Darwin building.  This can be reached through UCL's southern entrance, the large iron gates opposite Waterstones on Torrington Place.  Upon entering the gates, walk about 40 m and take a left; the Darwin building is straight ahead.  Go down the stairs to the Darwin LT. See map below.

For those connecting remotely via zoom, connection details can be found below:

https://cern.zoom.us/j/66031895926?pwd=6r4AYtZiViC3hSYODUJVCQQJ0AVEVT.1

 

Meeting ID: 660 3189 5926

Passcode: 051771

 

 

10:00 → 10:30 Coffee

10:30 → 12:30 Session 1

AdvertPHYSTAT25.pdf

Google doc

Slido-NovemberStatements

10:30 Introduction: agreeing/discussing the physics priorities for the future

This discussion aims to agree/discuss a set of (non-prioritised) physics goals for the future, with the view that these goals can be used to frame subsequent discussions on the future roadmap, including (but not limited to):

• Full characterisation of the properties of the Higgs
• Complementary coverage of possible dark matter candidates
• Push energy frontier exploration to highest achievable value
• Address unanswered questions in quark flavour physics
• Understand origin and nature of neutrino masses
• Precision in muon/kaon/EDM physics as a tool for indirect discoveries
• Others (to be proposed/discussed within the community)

ESPPU-UK-drafting-plans-UCLIntro090125-3.pdf

10:45 Introduction- additional priorities for the future

Opportunity to make specific statements on the list of non-physics considerations for the future. These will not be prioritised (we hope we can agree they are all important) but there are specific statements we may want to make on each of these areas:
- Long-term perspective
- Financial and human resources: requirements and effect on other projects
- Timing
- Careers and training
- Sustainability

11:00 Metrics and timescales for answering q3a “Which is the preferred next major/flagship collider project for CERN?”

We would like community input on what the metrics should be for converging on an answer to q3a, and what timescale we should be aiming to provide an answer (i.e. before March 31st or after all community inputs have been submitted).
[15’] Framing discussion- summary of the additional information we expect to be available after 31st March i.e. updated HL-LHC projections, updated LEP3 proposal, linear collider visions update, ECFA e+e- study report, FCC feasibility study report (feel free to add others).
[30’] Preliminary discussion on FCC as CERN’s preferred project- we would like to have an open discussion about the community’s thoughts about:
-The risks of not committing to building the FCC tunnel now.
-The risks of committing to building the FCC tunnel now

11:45 Scenario planning for the future: possible “plan A” options for CERN and scenarios for risk mitigation.

It was agreed in November that we should aim to discuss the future roadmap in terms of optimisation/risk mitigation for different scenarios. For the January drafting day, we have prepared two lists of scenarios for the community to provide input on (both before the meeting and during the meeting). The first considers alternative “plan A” roadmaps for CERN, and the second focuses on risk-mitigation assuming (as a starting point) CERN’s default plan of HL-LHC through to 2041 followed by FCC-ee in ~ 2047. The first set of scenarios will be discussed before lunch and the second afterwards; however, it is anticipated that some of the considerations may be linked.

Framing discussion (<15’) on the key (collider-related) recommendations from the last ESPPU, i.e. that
-The successful completion of the high-luminosity upgrade of the machine and detectors should remain the focal point of European particle physics, together with continued innovation in experimental techniques. The full physics potential of the LHC and the HL-LHC, including the study of flavour physics and the quark-gluon plasma, should be exploited.
- An electron-positron Higgs factory is the highest-priority next collider. For the longer term, the European particle physics community has the ambition to operate a proton-proton collider at the highest achievable energy.

Scenarios for discussion:
Discussion of possible “plan As” - what are the risks and opportunities? (Note that 1b, 3,4 and 5 are in tension with the recommendations of the last ESPPU so this discussion should also be steered by the input above).
1) FCC tunnel- part of discussion above but also additional options:
a) FCC-ee followed by FCC-hh (baseline integrated programme)
b) Intermediate energy FCC-hh as the first step (aggressive energy frontier programme)
c) FCC-ee, FCC-hh, FCC-eh (extended integrated programme)
2) Linear e+e- Higgs factory @ CERN
3) Expand LHC infrastructure (LHeC, FPF and other auxiliary experiments)
4) Delay next big collider experiment and focus on R&D
5) Muon collider @ CERN
6) LEP3 in LHC tunnel
Example risk mitigation exercise: assume CERN’s default plan is HL-LHC to 2041 followed by FCC(ee) in ~ 2047.
1) HL-LHC delayed/technical problems requiring >~5 years additional data-taking to reach 3000 /fb.
2) Updated HL-LHC projections place Higgs coupling sensitivities closer to e+e- projections.
3) Another Higgs factory begins construction prior to approval of FCC.
4) A significant (5sigma) deviation from the SM observed within the field (either at the 5) HL-LHC/LHC or at another experiment).
6) Technology (i.e. RF) required to deliver e+e- programme delayed by >~5 years.
7) FCC integrated programme deemed technologically, environmentally or financially unfeasible

12:30 → 13:15 Lunch

13:15 → 14:45 Session 2

Industry and the next generation of collider 090125.pptx

13:15 Wrap-up summaries from session 1

qrcode-question.png

13:25 Scenario planning

Aim to continue and conclude discussion of possible future collider scenarios.

13:45 Accelerator R+D topics for the future

• Blue skies R+D topics- do we want to prioritise any (subset) of technologies?
• Do we want to make a statement on the importance of ringfencing funding for disruptive technologies?

14:15 Additional considerations for the future collider roadmap

• Industrial input/return
• Communication/public engagement
• Training and retention of talent (including theory, software, instrumentation, accelerator science).

14:45 → 15:15 Coffee

15:15 → 17:00 Session 3

15:15 Framing discussion for non-collider topics

• Aim to present information on which non-collider projects/ experiments exceed the resource threshold (in terms of costs) for possible direct consideration/mention in our ESPPU input.
• Will also attempt to summarise points raised in November and submitted through the community inputs.

15:30 Summary of comments/considerations for non-collider questions

• Future of neutrino physics- statements on neutrino platform? Beyond accelerators?
• Dark matter and complementarity
  a) Do we want a statement on Boulby ambitions?
  b) Similar for FPF/Ship
• Importance of smaller (complementary) experiments
• Quantum technologies
• Others (based on community inputs)

16:00 Discussion of input related to astroparticle/ nuclear physics

16:30 Wrap-up + next steps

(1) 15' for discussion of wrap-up summaries from session 2
(2) 15' to discuss wrap-up/next steps for non-collider questions (session 3)

poll-results-Novemberdraftstatements-ESPPU-090125-1600.pdf