SnowmassCERN kickoff meeting Gabriella Sciolla Brandeis UniversityATLAS Keti

Snowmass@CERN kick-off meeting Gabriella Sciolla (Brandeis University-ATLAS) Keti Kaadze (Fermilab-CMS)

History of the Snowmass Meetings • Opportunity for US particle physicists to discuss the future of the field, come up with new ideas, new projects, … • A pretty old US tradition… • Original version: every few years (~5), 2 weeks in the summer at Snowmass, CO. Bring a pencil, an envelope, and a notebook. No politics: just dream big about Physics • Current version: Colorado Minnesota, back-of-anenvelope detailed MC, notebook laptop, but the main ingredient remains: dream big about the future of particle physics – your future!

Important caveat • Particle physics Frontier) Collider Physics (Energy • Particle Physics = LHC + Neutrinos + flavor physics + e+e- + precision experiments (EDM, …) + Dark Matter direct and indirect detection + Cosmic Frontier (Dark Energy, etc) + Theory of all of the above + Instrumentation (R&D)

The output of Snowmass • Single analysis groups submit white papers on particular studies to a working group. These contributions will be published in the Snowmass 2013 Electronic Proceedings. • WG conveners distill white papers into a chapter of the report • The report is submitted to APS/DPF • Narrative should communicate opportunities for discovery in high-energy physics to the our particle physics colleagues, to the broader scientific community, to the funding agencies/government, to the general public.

This Snowmass is particularly important for the accelerator-based community • US particle physics is at a cross-road • Less funds for research (not only for us) • Plans for the future of the field are in the making and the landscape MAY be changing • Energy frontier faces significant challenges • Funding: Onshore vs. Offshore based projects • Physics: Higgs was found: now what? • Particular problem of collider physicists • Traditionally a bit isolated from the rest of the community • Labs are far from Universities (CERN in particular) • What we do is “hard to sell” • We are so busy doing what we do that we do not even bother… A very dangerous approach in an uncertain budget reality

Staying here or going there? • Compared to other fields of particle physics, LHC experimentalists are far less likely to participate in this year Snowmass activities • Culture: senior professors worry about long term future, students and postdocs “do real work” • We are VERY BUSY publishing final Run I papers • Many of us are stationed at CERN: expensive! • Our lack of participation can be misinterpreted as lack of interest for the future of our field, especially from the young generation who will be leading the field in 10 -20 years • It’s hard for DOE/NSF to argue to keep funding collider physics if we do not show interest…

Danger for funding Let’s make sure that funding decisions are based on the merits of the Physics and not on other factors

How can you help shape your own future? • Build the strongest possible physics case • Unless Physics justifies it, no Phase II upgrade, no high luminosity run, no future machine … • It takes decades to plan for collider physics not too early! • Three different ways to contribute • “Standard Snowmass contribution”: pick an analysis you would like to do at high energy/high lumi and run with it. Present your work in one of the Snowmass Working Groups. Submit a 3 -4 pages white paper about the results. No ATLAS/CMS approval required. Cooperation with other experiments/theorists encouraged. • “ATLAS/CMS Snowmass White Paper contribution”: use experiment-specific simulation, pile-up conditions, etc. ATLAS/CMS approval required. Interested? Contact: Gabriella, Ashutosh or Beate for ATLAS and … for CMS • “ATLAS/CMS Upgrade working groups” activity: in ATLAS coordinate by Pippa Wells; for CMS … Longer term activity. My personal hope: start with 1) or 2) and evolve into 3) • No time to do “real work”? Just show up for the meetings • Come to the plenary sessions of the Snowmass meetings to let the community and the funding agencies know that you do care about the future of our field! • Plus knowing where your field is going is never a bad thing…

Why Snowmass@CERN? • To help CERN-based people to get involved in Snowmass in the most efficient way possible • Create local community who can work together across the experiments boundaries: share know-how, tools, etc • Connect people who want to contribute, with analyses that need help • Create the critical mass to be able to be heard (and seen) at the Snowmass meetings (video connection with Seattle and Minnesota) • Goals of weekly lunchtime meetings • Latest news about Snowmass • General news, new MC samples, what are the analysis going on, … • Advertise physics opportunities looking for manpower • Or advertise ideas looking for analyzers, show example of analyses, … • Get people familiar with the Snowmass tools

General information • Snowmass Energy Frontier page • http: //www. snowmass 2013. org/tiki-index. php? page=Energy%20 Frontier • Work organized in 6 working groups • HE 1: The Higgs Boson • Sally Dawson, Andrei Gritsan, H. Logan, Jianming Qian, C. Tully, R. Van Kooten • HE 2: Precision Study of Electroweak Interactions • Ashutosh Kotwal, Michael Schmitt, Doreen Wackeroth • HE 3: Fully Understanding the Top Quark • Kaustubh Agashe, Robin Erbacher, Cecilia Gerber, Kirill Melnikov, Reinhard Schwienhors • HE 4: Beyond the Standard Model - New Particles, Forces, Dimensions • Yuri Gershtein, Markus Luty, Meenakshi Narain, Liantao Wang, Daniel Whiteson • HE 5: Quantum Chromodynamics and the Strong Force • John Campbell, Kenichi Hatakeyama, Joey Huston, Frank Petriello • HE 6: Flavor Mixing and CP Violation at High Energy • Marina Artuso, Michele Papucci, Soeren Prell

The long road to Snowmass • Several Workshops were organized in preparation to Snowmass • Working group meetings, topical meetings, … • Example: Electroweak working group: Feb. 18 -20, at Duke University, QCD group: Jan. 31 at Fermilab, New Particles group: Jan. 14 -16 at U C Irvine, … • See agenda for LOTS of useful info Major Snowmass preparatory meetings • All-Hands Energy Frontier meeting: April 3 -6, at Brookhaven National Lab http: //www. bnl. gov/snowmass 2013/ • All-Hands Energy Frontier meeting: University of Washington, Seattle, June 30 - July 3. https: //sharepoint. washington. edu/phys/research/snowmass 2013/Pages/ Next big deadline: preliminary results presented here • The Snowmass meeting • All-Frontiers Snowmass 2013 Community Summer Study meeting: at the University of Minnesota, July 29 - August 7 http: //www. snowmass 2013. org/ The real thing!

Scenarios under investigations • LHC 14 Te. V, 300/fb , spacing: 25 ns, pileup: 50 events/crossing • LHC 14 Te. V, 3000/fb (HL-LHC) , spacing: 25 ns, pileup: 140 events/crossing • LHC 33 Te. V, 3000/fb (HE-LHC) , spacing: 50 ns, pileup: 225 events/crossing • VHE-LHC 100 Te. V, 3000/fb, spacing: 50 ns, pileup: 263 events/crossing • VLHC at 100 Te. V, 1000/fb , spacing: 19 ns, pileup: 40 events/crossing

Very important: the tools • Fast simulation tools available • DELPHES-3 fast simulation package • See Sanjay Padhi’s talk at BNL meeting https: //indico. bnl. gov/get. File. py/access? contrib. Id=51&session. Id=2&res. Id=0&material. Id=slides&conf. Id=571

Sanjay will give a talk at our next meeting (TBC)

Delphes MC samples are/will soon be available • Available at 13 Te. V, 14 Te. V will be available soon • See detailed info at http: //www. snowmass 2013. org/tikiindex. php? page=NPBackground. Samples. Twiki • For info about how to download samples,

How to stay in touch • Please subscribe to the following mailing list: cern@cern. ch • You will also get info about MC samples etc snowmass-ef- • Interested in more technical information? • LPC-CERN meetings on Wed @ 8 pm CERN time about production of samples, etc • Also announced in the mailing list above • Hopefully: weekly reports about Wed meetings at this lunchtime meetings • Suggestions? Requests? Questions? • sciolla@brandeis. edu and Ketino. Kaadze@cern. ch

Agenda • Today • G. Sciolla – Snowmass@CERN • T. Golling – Snowmass, a personal perspective • Everybody: disucssion + let’s get to know each other • Next week • Shih-Chieh Hsu -- multi-gauge-boson production studies (EWK group) • Introduction to DELPHES (TBC)

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