Introduction European Roadmap process results implementation Outlook  a personal selection CERN and the Future of Particle Physics R.-D. Heuer, Univ.

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Introduction European Roadmap process results implementation Outlook  a personal selection CERN and the Future of Particle Physics R.-D. Heuer, Univ. Hamburg/DESY/CERN DISCRETE‘08, Dec 16, 2008

Interplay and Synergy of different tools (accelerators – cosmic rays – reactors...) of different facilities different initial states lepton collider (electron-positron) hadron collider (proton-proton) lepton-hadron collider at the energy frontier: high collision energy and intensity frontier: high reaction rate Features of Particle Physics

possible due to precision measurements known higher order electroweak corrections LEP Test of the SM at the Level of Quantum Fluctuations indirect determination of the top mass prediction of the range for theHiggs mass

knowledge obtained only through combination of results from different accelerator types in particular: Lepton and Hadron Collider together with highly developed theoretical calculations Time evolution of experimental limits on the Higgs boson mass Synergy of colliders M H between 114 and ~200 GeV LEP,SLD, Tevatron… indirect direct  top

origin of mass/matter or origin of electroweak symmetry breaking unification of forces fundamental symmetry of forces and matter unification of quantum physics and general relativity number of space/time dimensions what is dark matter what is dark energy Key Questions of Particle Physics

Duration of large particle physics projects: decade(s) from science case via concept, R&D, and design to realisation and exploitation Excellent training grounds in particle physics, accelerator and detector technologies, computing Features of Particle Physics

1983 Duration of Projects First LHC physics workshop 1984 LEP experiments: LoI 1982 driving technology long term stability and strategy

The European Strategy for particle physics

CERN Council Strategy Group established Open Symposium (Orsay, Jan 31/Feb 1, 2006) Final Workshop (Zeuthen, May 2006) Strategy Document approved unanimously by Council July 14, 2006 The process:

The European Strategy for particle physics Unanimously approved by CERN Council July 14, 2006 LHC L~10 34

First beam around the ring September 10, 2008 Incident Sector 3-4 on September 19, 2008 Inauguration October 21, 2008 First physics run summer 2009 Nominal luminosity needs continued effort (LHC and injector chain)

Detectors have staged components  The initial phase (approved program) of LHC experiments is not yet fully established Experiments need manpower for commissioning  The initial phase of LHC still needs sustained international collaboration

Lyn Evans – EDMS Document Capture with optimum injection phasing, correct reference 13 Courtesy E. Ciapala September 10, 2008 Great success for Collider and for Experiments: working well

Lyn Evans – EDMS Document Interconnects September 19, 2008

Lyn Evans – EDMS Document Busbar splice Specification: resistance below nΩ

Lyn Evans – EDMS Document Busbar splice

1.Is there a Higgs? 2.What is the Higgs mass? 3.Is the Higgs a SM-like weak doublet? 4.Is the Higgs elementary or composite? 5.Is the stability of M W / M P explained by a symmetry or dynamical principle? 6.Is supersymmetry effective at the weak scale? 7.Will we discover DM at the LHC? 8.Are there extra dimensions? Are there new strong forces? 9.Are there totally unexpected phenomena? 10.What is the mechanism of EW breaking? Standard Nearly Standard Not at all Standard Initial phase of LHC will tell which way nature wants us to go

Initial phase of LHC will tell which way nature wants us to go Possible ways beyond initial LHC: Luminosity upgrade (sLHC) Doubling the energy (DLHC) new machine, R&D on high field magnets ongoing Electron-Positron Collider ILC CLIC Electron-Proton Collider LHeC „Tomorrow“ „Beyond“

The European Strategy for particle physics sLHCL~10 35 one possible way : luminosity upgrade

will partly be used to gradually increase performance of LHC, i.e. towards luminosity upgrade (L~10 35 ) sLHC : - New inner triplet -> towards L~2* New Linac (Linac4) -> towards L~4*10 34 construction can/will start now  earliest implementation~ New PS (PS2 with double circumference) - Superconducting Proton Linac (SPL) start design now, ready for decision ~ 2011 aimed for L~10 35 around (earliest) 2016/17 if physics requires - Detector R&D (seed money) Important: international collaboration CERN 2008 – 2011: 240 MSFr additional funding

sLHC Detector R&D for sLHC mandatory Concerted efforts are starting now

Initial phase of LHC will tell which way nature wants us to go Possible ways beyond initial LHC: Luminosity upgrade (sLHC) Doubling the energy (DLHC) new machine, R&D on high field magnets ongoing Electron-Positron Collider ILC CLIC Electron-Proton Collider LHeC „Tomorrow“ „Beyond“

The European Strategy for particle physics

High Energy Colliders: CLIC (E cm up to ~ 3TeV) –“Compact” collider – total length < 50 km at 3 TeV –Normal conducting acceleration structures at high frequency Novel Two-Beam Acceleration Scheme –Cost effective, reliable, efficient –Simple tunnel, no active elements –Modular, easy energy upgrade in stages CLIC TUNNEL CROSS-SECTION 4.5 m diameter QUAD POWER EXTRACTION STRUCTURE BPM ACCELERATING STRUCTURES Drive beam - 95 A, 300 ns from 2.4 GeV to 240 MeV Main beam – 1 A, 200 ns from 9 GeV to 1.5 TeV 12 GHz – 140 MW High acceleration gradient: ~ 100 MV/m Aim: Demonstrate all key feasibility issues and document in a Conceptual Design Report by 2010 and possibly Technical Design Report by ?

High Energy Colliders: ILC (E cm up to ~ 1TeV) 2-stage process Technical Design Phase I/II (2010/2012)

X-FEL at DESY a 10% ILC and 800 MEuros Test Facility! 3.4km Technically ready, start construction soon for operation from 2013 Major contribution from Europe and from DESY to the ILC-GDE efforts

GDE Strategy to address LC key issues Recent progress: much closer collaboration first meeting: February 08 CLIC collaboration CLIC issues ILC issues detector/physics issues RD

Strategy to address LC key issues Key issues common to all Linear Collider studies independently of the chosen technology in close collaboration between ILC and CLIC –The Accelerator Test Facility –European Laboratories in the frame of the Coordinated Accelerator Research in Europe (CARE) and of a “Design Study” (EUROTeV) funded by EU Framework Programme (FP6) –New proposal approved within the EU Framework Programme (FP7) comprising LC and LHC and more –HiGrade approved within FP7

ILC Detector challenges: calorimeter ZHH  qqbbbb red: track based green: calorimeter based High precision measurements demand new approach to the reconstruction: particle flow (i.e. reconstruction of ALL individual particles) this requires unprecedented granularity in three dimensions R&D needed now for key components Detector R&D mandatory and well under way

Dijet masses in WWνν, ZZνν events (no kinematic fit possible): Challenge: separate W and Z in their hadronic decay mode Jet energy resolution LEP-like detector LC design goal

Precision Higgs physics Determination of absolute coupling values with high precision

Dark Matter and SUSY Is dark matter linked to the Lightest Supersymmetric Particle? LC and satellite data (WMAP and Planck): complementary views of dark matter. LC: identify DM particle, measures its mass; WMAP/Planck: sensitive to total density of dark matter. Together with LHC they establish the nature of dark matter. Neutralinos is not the full story

Recent development: ECFA endorsed a series of workshop for the study of ep collisions in LHC Large Hadron electron Collider Goal: CDR in /12 new physics around ?

ring-ring solution: L ≤ linac-ring solution: L few Large Hadron electron Collider: possible layouts Would be the successor of HERA at higher cms GeV on TeV

neutrino sector The European Strategy for particle physics

J-PARC and T2K Neutrinosex: Θ first indications of Θ 13 should be available from either T2K or Double-Chooz

Neutrino Factory Proton driver –Primary beam on production target Target, capture channel –Create , decay to µ Cooling –Reduce transverse emittance Muon acceleration –~130 MeV to GeV Decay ring(s) Store for ~500 turns Long production straights International Scoping Study (ISS): aim: have RDR by 2012 when first indications of Θ 13 should be available from either T2K or Double-Chooz

Great opportunities ahead Window of opportunity for decision on the way forward (?)

So…any changes needed for the future? facilities for HEP (and other sciences) becoming larger and expensive funding not increasing fewer facilities realisable time scales becoming longer laboratories are changing missions  more coordination and more collaboration required

from CERN Council Strategy Document Key message Outlook: Enhancing World Collaboration

We need - to maintain expertise in all regions - long term stability and support in all three regions - to engage all countries with particle physics communities - to integrate particle physics developing countries (regions) - global view from funding agencies - a closer linkage of (at least) particle physics and astroparticle physics

We need - to maintain expertise in all regions national – regional – global projects - long term stability and support in all three regions  example: CERN Council - to engage all countries with particle physics communities  CERN Council Working Group set up and CERN Coordinator for External Relations established - to integrate particle physics developing countries (regions) CERN Council Working Group / ICFA CERN Coordinator for External Relations - global view from funding agencies FALC (modified) as a first step ? - a closer linkage of (at least) particle physics and astroparticle physics Europe: CERN, CERN Council, ASPERA ICFA ?....

We are NOW entering a new exciting era of particle physics Turn on of LHC allows particle physics experiments at the highest collision energies ever Expect - revolutionary advances in understanding the microcosm - changes to our view of the early Universe CERN unique position as host for the LHC

Results from LHC will guide the way Expect - period for decision taking on next steps in 2010 to 2012 (at least) concerning energy frontier -(similar situation concerning neutrino sector Θ 13 ) We are NOW in a new exciting era of accelerator planning-design-construction-running and need - intensified efforts on R&D and technical design work to enable these decisions - global collaboration and stability on long time scales (reminder: first workshop on LHC was 1984)

We need to define the most appropriate organisational form NOW and need to be open and inventive (scientists, funding agencies, politicians...) Mandatory to have accelerator laboratories in all regions as partners in accelerator development / construction / commissiong / exploitation Planning and execution of HEP projects today need global partnership for global, regional and national projects in other words: for the whole program Use the exciting times ahead to establish such a partnership

Particle Physics can and should play its role as spearhead in innovations as in the past now and in future