OUTLOOK to the FUTURE Options for Future...
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OUTLOOK to the FUTURE! Options for Future Facilities ! !Prof. Albert De Roeck CERN, Geneva, Switzerland Antwerp University Belgium UC-Davis California USA IPPP, Durham UK NTU, Singapore
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Observation of a Higgs Particle at the LHC, after about 40 years of experimental searches to find it
The Higgs particle was the last missing particle in the Standard Model and possibly our portal to physics Beyond the Standard Model
proton proton
2012: A Milestone in Particle Physics
2013
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SM-like behaviour for most properties, but continue to look for anomalies, i.e. unexpected decay modes or couplings, multi-Higgs production, other Higgses…
We know already a lot on this Brand New Higgs Particle!!
Mass = CMS+ATLAS 125.09 ±0.21(stat) ±0.11(syst) GeV
Width = A: < 24 MeV C: < 22 MeV (95%CL)
Couplings are within 20% of the SM values
Spin = 0+(+) preferred over 0-,1,2
Brief Higgs Summary
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A Higgs…
Stockholm Nobel Symposium May 2013
We do not understand why the mass of the Higgs is 125 GeV It most likely tells us something on what is Beyond the Standard Model
Guido Altarelli
125.0 +/- 0.3 GeV
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The Future: Studying the Higgs…
Many questions are still unanswered: �What explain a Higgs mass ~ 125 GeV? �What explains the particle mass pattern? �Connection with Dark Matter? �Where is the antimatter in the Universe? �…
Higher Energy in 2015! LHC lumi upgrade ! Experiment upgrades!! (Other/new machines?)
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Consequences for our Universe? Precise measurements of the top quark and the Higgs mass:
New Physics inevitable? But at which scale/energy?
arXiv:1403.6535
We also know that:
N. Arkani-Hamed
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• « Empty » space is unstable • Dark matter • Origin of matter • Masses of neutrinos • Hierarchy problem • Inflation • Quantum gravity • …
The Standard Model
Run 2 Run 2 Run 2
Run 2
SUSY SUSY SUSY
SUSY SUSY SUSY
John Ellis BUSSTEPP August 2015
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Will concentrate here on the Energy Frontier
Evaluated in all regions: Europe Asia, the Americas
�European strategy group �Snowmass study and IP5 �Japan strategy group
The Three Frontiers
2012-2014
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Europe Strategy Group
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The LHC Upgrade
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Long Term LHC Schedule
F. Bodry EPS Vienna, July 2015
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HL-LHC – LHC modifications
Booster energy upgrade 1.4 → 2 GeV, ~2014
Linac4, ~2014
SPS enhancements (anA e-‐cloud coaAng,RF,
impedance), 2012-‐2022
IR upgrade(detectors, low-‐β quad’s,crab caviAes, etc)
~2022
F. Zimmerman
Does not come for free: ~1,000 MCHF (F Zimmerman Sendai, June 2013)
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Beyond the LHC
�Proton-proton machines at higher energy… �Electron-positron machines for high precision… �Both? And allowing for electron-proton collisions..? New projects will take 10-20 years before they turn into operation, hence need a vision & studies now!
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From the European Strategy Group
Similar recommendation from the Snowmass studies in the US
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The CERN Roadmap F. Bodry , March 2015
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The FCC Project Future Circular Colliders: The return of studies for circular machines!
A world-wide study…
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A High Energy Proton-Proton Collider “Machine Options”
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Circular e+e- collider with √s energy in the range of 90-350 GeV Can serve 4 experiments simultaneously! Challenging but no showstoppers!! (2 rings) Energy loss/turn ~ 8 GeV
FCC-ee: The Electron-Positron Option
Tera-Z, Oku-W, Mega-H, Mega-top
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FCC Timeline
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The FCC-hh Project
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The FCC-hh Project
See I. Hinchliffe et al. arXiv:1504.06108
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The FCC-ee Project
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FCC-ee Luminosity Targets
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Developing Proposal in China… China expressed has interest in the construction of a new large accelerator, first as an e+e- Higgs factory and then as a high energy pp machine. Aim: design completed in 2020 Contribute to the world effort
Possible site: Qinhuangdao (1 hr by train from Beijing)
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Idea Proposed to the US P5 Panel Could the tunnels we drilled for a collider in Texas house a Higgs factory? And add a bigger ring to it? 300 TeV collider???
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Linear e+e- Colliders Electron-positron machines for high precision and possibly high energy (few TeV) … Avoid synchrotron radiation from a circular machine Studies and R&D work on linear colliders started in the ‘90’s and they have achieved a very high level of maturity now…
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ILC Layout Japan has expressed a strong interest to host this collider! Under discussion…
Comparison of different e+e- colliders Note: in 2013 ILC produced a
plan to double the luminosity (not included in the figure)
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CLIC: Two Beam Acceleration CLIC parameters
Parameters for √s �500 GeV �1.4 TeV �3 TeV
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Tunnel implementations (laser straight)
Central MDI & Interaction Region
CLIC Layout @ CERN
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The CLIC Collaboration
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The Physics at the Future Colliders
�Studies for linear colliders documented in TDRs since ~ 15 years, regularly updated �HL-LHC studies started in 2012, ongoing �FCC-ee studies started in 2012, ongoing �FCC-hh and FCC-he studies started end of last year Apart from LC studies, most of the future collider studies are just at the beginning. (-> volunteers welcome!!)
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• Properties of the new Higgs boson, precise determination of its characteristics
• High mass reach for new particles and interactions • Precision measurements • Rare process -> However, no “no-loose theorem” known, as yet.
Physics Program: Key Topics
Mass Reach: 100 TeV/3 ab-1 vs. 14 TeV/300 fb-1
Studies in progress
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High Luminosity LHC Precision
Determine the Higgs couplings to a few % precision…
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FCC-hh: Higgs M. Klute, March 2105 Relative cross section
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FCC-hh: Searches for New Particles Searches for pair produced SUSY particles
Upper limit for higher Higgs mass in 2HDM models?
FCC-hh -Reach sparticle masses search up to about 16 TeV for squarks of light quarks and 7 TeV for stops -Excited quarks probe the structure of quarks down to 4x10-21 m -Discovery of resonances up to masses of 40-50 TeV
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Physics at e+e- Colliders Higgs Boson Couplings
Fit to all EWK precision measurements
Higgs Boson decays
ILC luminosity upgrade not included
Higgs couplings vs particle mass
arXiv1308.6176
FCC-ee delivers very precise measurements
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The Higgs Self Coupling! A key measurement for our understanding of the Higgs field potential!
in pp
Difficult measurements!!: Evaluation till ongoing for HL-LHC sensitivity e+e- machines with sufficient energy and FCC-hh can measure this process precisely
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• In 2012 we found a Higgs Boson at the LHC. The next LHC run @ 13/14 TeV will hopefully reveal more.
• Study the Higgs in detail. (HE-)LHC will be able to do a lot but not everything we want…
• High energy pp colliders, at 100 TeV, will substantially extend the reach for new particles and interactions
• e+e- options for precision measurements (ILC, CppC, CLIC, FCC…): Higgs Factories
• Lots of physics studies to be done, new ideas to be explored (TH+EXP). More contributors highly welcome
• The path towards new machines is long, and benefits for society (technology) will play an important role.
Summary