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ILC Physics and Detectors

ILC Physics and Detectors. Akiya Miyamoto KEK 8-March-2005. APPI 2005. Contents. ILC overview Physics - Highlights Detector – Concept studies Summary. International Linear Collider. ICFA Decision

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ILC Physics and Detectors

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  1. ILC Physics and Detectors Akiya Miyamoto KEK 8-March-2005 APPI 2005

  2. Contents • ILC overview • Physics - Highlights • Detector – Concept studies • Summary

  3. International Linear Collider • ICFA Decision • ICFA chose Superconducting Technology at ICHEP04, Beijing following the recommendation of ITRP • ITRP recommended a technology, but not a design. The final design is expected to be developed by a team drawn from the combined warm and cold linear collider communities. gGDI GDI: Based on MOU among labs. for accelerator R&D and design Organization under ILCSC. Central team + 3 regional teams.

  4. ILC Schedule 2004.8 Adopted ‘Cold’ at IHEP, Beijing 2004.11 1st ILC workshop at KEK 2005.2 Decide the director and location of Central GDI 2005. Establish Regional GDIs 2005.8 2nd ILC workshop at Snowmass. Decide design outline ( acc. Gradient, 1/2 tunnel, dogbone/small DR, e+ generation, etc.) 2005 end Complete CDR 2007 end Complete TDR, role of regions, start site selection 2008 Decide the site, budget approval 2009 Ground breaking 2014 Start commisioning now

  5. ILC Parameter • TESLA is the baseline design, but many alternatives under discussion • Accelerating gradient : 35MeV/m or higher • Number of tunnels: 1, 2 or 3 • Damping ring: dog bone or single • Positron production: undulator or conventional • Crossing angle: 0 ~ 30mrad • Number of Interaction Points : 1 or 2 Ecm: 1st phase 200 ~ 500 GeV, 2nd phase 1000 GeV Luminosity: ~2x1034/cm/s for >500fb-1 in 4 years After Ecm upgrade, >1ab-1 in 4 years

  6. Physics Opportunities at ILC • Electron/positron collision (elementary process) • High Energy and High Luminosity • Energy scan (controllable) • Controllable beam polarization • Very sensitive detectors • Trigger free • Precise theoretical calculation (<1%) Precise physics information & long energy reach LHC gives us new single global mixed picture. ILC gives us new dynamic multi-dimensional total views.

  7. 4-jet 2 lepton+X 2-jet+missing Physics of EW symmetry breaking Typical Higgs signal • Model independent study of Higgs >105 Higgs for 500fb-1 ILC is a Higgs Factory! Decay mode independent Higgs search

  8. Studies of Higgs Properties Vertexing To tag b/c/t Energy scan self coupling

  9. Beyond SM : SUSY • LHC would discover SUSY phenomena quickly, however • Complicated cascade chain • Large SM and other SUSY backgrounds • Model dependence of new physics analyses • Non-colored SUSY particles is usually lighterthan colored SUSY particles g ILC LHC ILC Masses of neutralino and slepton are determined at O(0.1) GeV g improves LHC’s SUSY mass meas.

  10. Cosmology and LC • WMAP data suggest dark matter

  11. f, V, H G f, V, H Beyond SM : Extra Dimension • Indirect search • Direct search e+e-g HH N. Delerue, K. Fujii & N. Okada Odagiri • Reflects spin2 nature of KK graviton • No SM backgrounds in HH channel • ~700 events detected @1TeV, 500fb-1if Ms=2TeV n = number of extra dimension To be determined at ILC

  12. Precission Physics Masses of top, W sin2qwgnew physics effect in loop

  13. Summary of ILC Physics

  14. Good jet energy resolution g calorimeter inside a coil highly segmented calorimeter Efficient & High purity b/c tagging g Thin VTX, put close to the IP Strong solenoid field Pixel type High momentum resolution Hermetic down to O(10)mrad Shiled enough against beam-related background Detector for ILC experiments Detector design Philosophy Muon detector Calorimeter Coil Vertex detector Tracker

  15. Jets are copiously produced at ILC. Efficient detections of jets are crucial for physics involving W/Z/Top/H.. Study H to VV coupling at H.E. “Super” detector 5k events/4y LEP like ILC target

  16. B=0 Particle Flow Analysis • sjet2 = sch2 + sg2 + snh2 + sconfusion2+ sthreashold2 • Charged ~ 60% by tracker • Gammas ~ 30% by EM cal • Neutral Hadron ~10% by HD cal. • Separation of charged particle and g/neutral hadron is important • Separation : BL2/Rm ( if consider curvature by B) • L=Rin(Barrel) or Zin(End Cap), • Rm=Effective Moliere length E(Energy stored in Coil) ~ B2L3 therefore But If same cal. Segmentation is used

  17. Vertex tagging • To achieve high efficient and high purity b/c tagging, good vertex detector is crucial g put Vertex detector as close as possible

  18. Vertex detector issues • Compared to 4T case, pair background hit at R= 15mm becomes x1.7 larger in 3T • At larger R, the background hit would decrease significantly • The configuration of R=20 mm with Si thickness < 70 mm and 500 mm thick beam pipe at R=12 mm still satisfies the requirement of sb=5  10/(pbsin3/2q) mm # of fired pixels ~ 5.0 pixels/hit TRC500 beam parameters Inner radius should be optimized based on physics performance using ILC parameter

  19. Detector concepts “GLD” SiD LCD B 3T REM 2.10m TPC W+Scinti. Cal. EM seg. 2x2cm2 or strip B 4T REM 1.68m TPC W+Si Cal. B 5T REM 1.27m 5 layers Si tracker W+Si Cal. EM seg. 0.5x0.5cm2 All these parameters are subject to change

  20. WWS • WWS(World Wide Study for Linear Collider Physics and Detector) • A committee for LC physics and Detectors under ILCSC. ( note : GDI/GDO is only for accelerator issues. ) • 3 Co-chairs from each region + 5~6 members from each region • Tasks • Organize LCWS seriese. 2005 at SLAC, 2006 at India • Promote experimental program until Global Lab. takes over its role. • Feb. 2004, ILCSC asked the Worldwide Study to develop a plan for organizing the experimental program in parallel with the GDI for the machine. • WWS will organize: R&D panel, MDI panel, detector costing panel • WWS will request each concept teams to write “Detector Outlines”, which will be inputs for R&D panel.

  21. Organization chart IUPAP ICFA (J.Dorfan) Asian LCSC 3 regional steering com. ( Asia, N.A., Europe) ILCSC (M.Tigner) Wold Wide Study GDI Phys.&Det. Sub-Com (J.Brau, H.Yamamoto, D.Miller) ACFA Phys.&Det. WG Costing panel R&D panel MDI panel

  22. Time line of Experimental program 2004 2005 2006 2007 2008 2009 2010 (Construction) GDI (Design) Technology Choice Acc. CDR TDR Start Global Lab. TDRs Detector Outline Documents CDRs LOIs Det. WWS Detector R&D Panel Collaboration Forming R&D Phase Construction Tevatron SLAC B HERA LHC T2K

  23. Summary • Aims of the energy frontier experiment at ILC are • To unveil physics of EW symmetry breaking and to understand the structure of vacuum which is filled by Higgs • To unveil new physics and establish new principle • SUSY, … • Extra dimension …. • After ITRP decision last year, • Accelerator activity is united and moving very fast towards CDR, TDR, … • A program to set up experimental program has been set up and LC community is moving along that direction. • Many events/decisions concerning ILC is expected this year. • LCWS2005(3/18-23, SLAC), 8th ACFA(7/11-14), Snowmass(mid. Aug), LCWS2006(Feb/Mar, 2006)

  24. Backup slides

  25. GDI: First stage of GDO

  26. Merit of Huge Detector • Good Jet Energy (Particle) Flow Measurement Good charged track separation in a jet at the inner surface of the calorimeter large BR2 • Pattern recognition is easier large n with thin material, small number of low momentum curling tracks • Good momentum resolution for charged particles large BR2 √n • Good dE/dx measurement for charged particles large n • Smaller relative volume of the dead space small ΔV/Vfor constant ΔV • Good two track separation, Larger efficiency for Ks and Λ (any long lived) large BR2 , larger R

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