Summary R.-D. Heuer, Univ. Hamburg/DESY/CERN CERN, Nov 20, 2008 LCWS 2008 University of Illinois at Chicago Outlook Physics Accelerator and Detector General.

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Presentation transcript:

Summary R.-D. Heuer, Univ. Hamburg/DESY/CERN CERN, Nov 20, 2008 LCWS 2008 University of Illinois at Chicago Outlook Physics Accelerator and Detector General Remarks

R.-D. Heuer, Univ. Hamburg/DESY/CERN CERN, Nov 20, 2008 LCWS 2008 University of Illinois at Chicago Outlook Physics Accelerator and Detector General Remarks

“Discovery” of Standard Model through synergy of hadron - hadron colliders (e.g. Tevatron) lepton - hadron colliders (HERA) lepton - lepton colliders (e.g. LEP / SLC) Past decades until today

knowledge obtained only through combination of results from different accelerator types in particular: Elektron-Positron Collider 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,SLC, Tevatron… indirect direct  top

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 With the turn on of LHC entering an exciting phase of particle physics at the highest collision energies ever  Many years of exciting physics ahead

Jonathan Bagger Two striking examples of LHC-ILC synergy

Dark Matter Astronomers & astrophysicists over the next two decades using powerful new telescopes will tell us how dark matter has shaped the stars and galaxies we see in the night sky. Only particle accelerators can produce dark matter in the laboratory and understand exactly what it is. Composed of a single kind of particle or more rich and varied (as the visible world)? LHC and LC may be perfect machines to study dark matter.

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

LHC and LC results should allow, together with dedicated dark matter searches, first discoveries in the dark universe around 73% of the Universe is in some mysterious “dark energy”. It is evenly spread, as if it were an intrinsic property of space. It exerts negative pressure. Challenge: get first hints about the world of dark energy in the laboratory

The Higgs is Different! All the matter particles are spin-1/2 fermions. All the force carriers are spin-1 bosons. Higgs particles are spin-0 bosons. The Higgs is neither matter nor force; The Higgs is just different. This would be the first fundamental scalar ever discovered. The Higgs field is thought to fill the entire universe. Could give some handle of dark energy (scalar field)? Many modern theories predict other scalar particles like the Higgs. Why, after all, should the Higgs be the only one of its kind? LHC and LC can search for new scalars with precision.

Precision Higgs physics Determination of absolute coupling values with high precision

LHC and LC results will allow to study the Higgs mechanism in detail and to reveal the character of the Higgs boson This would be the first investigation of a scalar field This could be the very first step to understanding dark energy

Past decades saw precision studies of 5 % of our Universe  Discovery of the Standard Model The LHC will soon deliver data Preparations for the ILC as a global project are under way, R&D for CLIC well progressing The next decades look very exciting: We are just at the beginning of exploring 95 % of the Universe

R.-D. Heuer, Univ. Hamburg/DESY/CERN CERN, Nov 20, 2008 LCWS 2008 University of Illinois at Chicago Outlook Physics Accelerator and Detector General Remarks

Marc Ross great advantage not to be missed

Barry Barish

CLIC-ILC Collaboration started November 2007 ILC GDE CLIC Collaboration Board ILC CLIC No additional meetings but reinforced participation of CLIC experts to ILC meetings and ILC experts to CLIC workshop Jean-Pierre Delahaye

CLIC – ILC Collaboration Strategy CLIC08) What can ILC bring to CLIC? –Use the same cost basis. –develop a credible comparison –(ILC will help in the costing of CLIC) And CLIC to ILC: –CERN & CLIC-collaboration experts to work with ILC team on common design issues The credibility of each project within our community will be facilitated through communication

Conclusion of Barry As we look to the future, we anticipate that LHC results will establish the scientific case for a linear collider. If the science warrants a 0.5 to 1.0-TeV ILC, the agreement for joint ILC/CLIC work will be helpful towards our primary GDE goal of being ready to propose a solid project at that time. If the LHC results indicate the need for a higher- energy lepton collider, we will be prepared as a community to aggressively continue to develop the CLIC concept on a longer timescale.

Conclusion CLIC/ILC collaboration on subjects with strong synergy Win –Win for both studies and for HEP Ambitious but realistic and practical approach –starting on limited number of subjects –plan of actions defined by conveners –common work already started Most efficient use of limited resources Provide credibility to Linear Collider Community by: –mutual understanding of status, advantages, issues of both tech. –responsible preparation of the future comparison of the possible options for HEP with agreed pro&cons and well defined criteria Collaborative Competition and / or Competitive Collaboration TILC08 March 2008 the whole after all its physics which counts

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

CLIC-ILC Detector studies W 3 TeV study performance of detector concepts over the entire range of energies together first results encouraging: e.g. particle flow concept works Next step at CERN: Install Project Group at CERN for LC Detector R&D starting January 2009

There was a proposal at this workshop about an ECFA LC Workshop in April 2010 at CERN Please approach us……

R.-D. Heuer, Univ. Hamburg/DESY/CERN CERN, Nov 20, 2008 LCWS 2008 University of Illinois at Chicago Outlook Physics Accelerator and Detector General Remarks

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 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 )

Large Hadron electron Collider Goal: CDR end /12 new physics around 2010/12 ?

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 ) First steps concerning CERN in 2009: Meeting of CERN-DG ILC GDE Executive Committee CLIC Steering Committe Meeting of directorates of FNAL-KEK-CERN

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