Screen shot at 17:00 on Thursday

Concluding remarks

Alain Blondel 4th physics workshop concluding remarks

From the round table

Why do we need a new accelerator after the LHC? Challenge brought about by J. Mnich, and repeated several timeVarious wordings around the fact that the discovery of the Higgs is a big jump into the unknown because many open questions remain it would be great to organize a short argument that summarizes the point.

Within our field and nearby science (astro-particles, cosmologists etc..) For more general scientific community For the public

Important to be very clear on the cost vs time profile (10+1+17)BCHF over 40-50 years is not the same as “30BCHF”!

How do we attract the young generation of experimenters for FCC-ee studies? understanding of how to collaborate with the big LHC experiments to somehow find a way that youngsters can do e.g. R&D on FCC and operations+analysis on CMS or ATLAS is important. Probably difficult until HL-LHC upgrade is done but it is important to think about it for the experimentalists.

Guenther: need to discuss with LHC experiments .. -- chat room: Future accelerator studies are a great opportunity to explore uncharted territory, discover/invent new thingsand to publish ‘few authors’ original material.

Also an opportunity to broaden one’s vision of the physics, contact theorists and acc. physicists, etc...

please send around your take-aways from the round table! beate.heinemann@desy.de milstead@fysik.su.se

Alain Blondel 4th physics workshop concluding remarks

mailto:beate.heinemann@desy.demailto:milstead@fysik.su.se

From the workshop

502 registered participants to the physics workshop ( 910 for the whole November workshop)

Tremendous talks across the board in all sessions Congratulations to all conveners and speakers!

First results from the Physics Performance effort Congratulations to Emmanuel and Patrizia and contributors!

many new faces!

si-VTX module is not necessarily square or flatLaci Andricek DEPFET (Belle II and Beyond)

towards a first layer of 11mm radius?

Alain Blondel 4th physics workshop concluding remarks

Julie Hadre

Alain Blondel 4th hysis workshop concluding remarks

Here are four detectors....

Yifang Wang Status of CEPC

“While maintaining scientific collaboration , we should continue to proceed in parallel until one is approved: •Competition can enhance the chance for both •Higgs factory is too important to miss”

Comments about Physics Workshop

Can we avoid so much/many parallel sessions?-- with so much material/people 1 meeting/year, its difficult to avoid -- solution might be to have

-- regular, frequent, working group meetings -- as appropriate: mini-workshops on dedicated topics

(possibly involving TH & EXP) -- and pick out highlights or summaries for plenary FCC-all and Physics meetings

Can we have Pizza together in the evening?

We miss being able to see/shake-hands/hug our friends, chat etc....

Alain Blondel 4th physics workshop concluding remarks

NEXT STEPS

Caveat: we are awaiting a new mandate from the CERN management -- continuing now on the basis of the 2013 mandate

Within FCC-IS some milestones are well established

Alain Blondel 4th physics workshop concluding remarks

Alain Blondel 4th physics workshop concluding remarks

IMPORTANT MILESTONES AND EVENTS

-- reach out to all ‘European and International Partners’-- complete organization of physics conveners within the next two months

-- nominations and volunteers welcome (contact AB and PJ) -- completion of first case study(es) in spring 2021 detector requirements-- decide on FCC Layout (compatible with 4 IRs or not) by summer 2021-- FCC week in Mai-June 2021 (hopefully in person!) then annual event. -- FCC-IS Physics Workshop in Winter 2022 in Liverpool-- FCC-IS Physics Workshop in Winter 2023 in Poland-- FCC-IS Physics Workshop in Winter 2024 in France

-- delivery of Physics and Experiments CDR ++ END 2024

-- to serve as support for experimental proto-collaborations EOI/LOIs for next ESPP

THANK YOUOrganization of November FCC Workshop (FCC-IS Kick-off meeting)Frank Zimmermann, Johannes Gutleber, Michael Benedikt

The first day speakers Jorgen D’Hondt, Ursula Baessler, Fabiola Gianotti, Joachim Mnichfor clarifying the ESPP and the future vision for us(esp. the relation between a possible ILC decision and the FCC-ee project)

The organization of the 4th Physics workshopMichelangelo Mangano, AB, Mogens Dam and Patrick Janot

The round table panelists --Michael Benedikt- Daniela Bortoletto- Themis Bowcock- Guenther Dissertori- Caterina Dogloni- Aida X El-Khadra- Christophe Grojean- Matthew McCullough- Sarah Williamsand chairs/organizers: Beate Heinemann and David Milstead

Alain Blondel 4th physics workshop concluding remarks

Alain Blondel 4th physics workshop concluding remarks

Alain Blondel 4th physics workshop concluding remarks

Vertex detector Auguste Besson (Strasbourg)Paula Collins (CERN)Andreas Jung (Fermilab)

Tracker Dominik Dannheim (CERN)Bernhard Ketzer (Bonn)Franco Grancagnolo (Lecce)

MDI Nicola Bacchetta (CERN)Manuela Boscolo (Frascati)Angeles Faus-Golfe (Paris-Saclay) Jorg Wenninger (CERN)

Panos Charitos

Julie Hadre

Alain Blondel 4th physics workshop concluding remarks

Thank you!

Alain Blondel 4th physics workshop concluding remarks

How do you deal with a sceptic who says the SM is complete and there is no need to go further with the FCC ? What is the most compelling reason to do the FCC (in particular to also convince the funding agency)?

What are the biggest technical challenges about the FCC-ee to achieve the measurement precision required?Should the FCC-ee analysis and detector aspects be discussed in close collaboration with ILC, maybe jointly discussing explicitly what aspects are different and which are the same to leverage the manpower best?

Is it a good idea for early career experimentalists to spend significant time on FCC? What sort of fractions is useful? Should the organisational model follow those of the LHC experiments, e.g. regarding how tasks are shared and how authorship is granted?Should students and postdocs try to spend some time on the FCC now, and how can they prioritise this w.r.t. LHC operation and data analysis?

How can we engage the theoretical community sufficiently to achieve the extraordinary precision required to fully capitalize on the FCC data?

List of questions for the round table discussion B. Heinemann, D. Milstead

Alain Blondel 4th physics workshop concluding remarks

Can early career researchers or scientists at universities help with the R&D on superconducting magnets? Or, are there other very important technical areas led by CERN where universities could contribute?

In view of the detector developments required, how can we make sure this receives the attention and funding required to ensure the technology is ready when we need it? What are the key technology advancements required for FCC-ee / FCC-hh? Are there any revolutions needed?

Will analysis in the 2050s actually be done by humans or will it all be automated by AI?

How many experiments and access points there will be at the FCC? Will there be specialised experiments like lhcb and ALICE or general purpose like atlas and CMS?

The LHC ring will provide protons to the FCC. But since filling doesn't happen at all times, what will the LHC ring be used for in the meantime? Will there be an equivalent or the current North Area with more experiments?

The LHC was never used for ep collisions. How will the FCC handle the complexities of this installation and how is it different from the LHC in that sense?

Alain Blondel 4th physics workshop concluding remarks