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Snowmass2005 report

Snowmass2005 report. 2005/09/26 H. Matsunaga GLDCAL meeting. Snowmass05. A joint workshop Second ILC workshop (Accelerator) ALCPG workshop (Physics and Detector) American regional -> World-wide http://alcpg2005.colorado.edu/ Snowmass, Colorado Altitude ~2500 m Two weeks: 8/14 ~8/27

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Snowmass2005 report

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  1. Snowmass2005 report 2005/09/26 H. Matsunaga GLDCAL meeting

  2. Snowmass05 • A joint workshop • Second ILC workshop (Accelerator) • ALCPG workshop (Physics and Detector) • American regional -> World-wide • http://alcpg2005.colorado.edu/ • Snowmass, Colorado • Altitude ~2500 m • Two weeks: 8/14 ~8/27 • Sort of “real” workshop • ~600 participants • 60 persons from Japan

  3. Snowmass

  4. Sessions • Many plenary and parallel sessions • Accelerator • Detector • Physics • Education & Outreach • (Private communication/discussion) • Detector sessions • Detector components • CAL, SIM, MDI, MUON/PID, PFA, Test beams, TRK, VTX • Concept studies • GLD, LDC, SID

  5. Special sessions etc. • Accelerator Seminars/Tutorials • Physics Benchmarks • Industrial Forum • Special Evening Forum : “Challenges for Realizing the ILC : Funding, Regionalism, and the International Collaboration” • Views from ICFA, HEPAP, DOE, NSF, Asia, FALC, Europe,… • Public Lectures (Y-K. Kim, H. Murayama) • Concepts Groups meet with WWS R&D panel • Case for 2 Detectors • Cosmology and ILC • LHC-ILC

  6. Accelerator part • Working Groups (WG 1, 2, 3a, 3b, 4, 5, 6) • Formed Global Groups (GG 1, 2, 3, 4, 5, 6) • BCD (Baseline Configuration Document) by the end of 2005 • Good summary by Yokoya-san at the recent JPS

  7. Fourth Concept • Fourth concept was proposed • John Hauptman, Richard Wigmans et al. • Compensating CAL; not PFA-directed • 20%/√E for e, hadron and even jets • Dual fiber readout : Scintillation & Cherenkov • Correct EM fraction event-by-event • How to construct 4p detector ?

  8. Detector session • Main focus on PFA (Particle Flow Algorithms) • PFA plenary session • No group has achieved the goal of 30%/√E for jets • Still need a lot of work to obtain definite answer • Next four pages are taken from Jean-Claude Brient’s talk • May need more detailed study (tracking etc.)

  9. the energy resolution EJ=a√EJ ⊕bEJ+c Essentially already given by A.Raspereza on LDC the Angular Dependence !! ALEPH , a=0.8 in end-cap ATLAS , a=1.2 in end-cap etc… Why the value of b is so important !! (and why a calorimetric approach is not the solution) * NIM A360 (1994),480

  10. JCB Real data H1 ATLAS ALEPH Ejet ( GeV) ? Depends on Granularity and Physics process (jet mul., √s…) Goal for PFA-ILC confusion threshold Ejet ( GeV) * NIM A360 (1994),480

  11. 1.5 x the pad size Fraction of the photon(s) energy per event , closer to a charged track than some distance 1.5 x pad size is needed for photon reconstruction Fraction Distance in cm

  12. Measurement Directly related To the TOTAL WIDTH Of the Higgs !!! 8 to 10% of the energy !! Region for LDC, SiD

  13. Pad size is more important than Moliere radius • 1x1 mm2 pad size • 21 and 17 GeV at 1.2cm apart • For tau decays, granularity may be most important than quark/gluon jets By H. Videau (and J-C. Brient)

  14. Granularity Study By T. Yoshioka • Different granularity • is tested. • - So far, no gain with • finer segmentation. • (under study) Default segmentation This results are due to production on Z-pole ?

  15. CAL session • Three concepts + fourth (“DREAM”) by R. Wigmans • Still many proposals • Comparison session • Silicon-based ECAL • Sci.-based ECAL • RPC-based HCAL • GEM-based HCAL • Sci.-based HCAL

  16. CALICE Tile-HCAL • Talk by Felix Sefkow • Scintillator Tile + SiPM • Already used in their Minical • Construct HCAL module for testbeam • Using thousand SiPM • Established mass production and quality control scheme • Frontend electronics

  17. Misc. • Need to validate the feasibility of orthogonal strip readout • Discussed with Patrick le Du for Front-end electronics • Detector outline document due end of February 2006 • Detector CDR due end of 2006 • Testbeam around 2007? • http://www.linearcollider.org/cms/ • Upcoming meeting etc. • ECFA ILC workshop, Vienna, Austria, 14-17 November 2005 • LCWS 2006, Bangalore, India, 9-15 March 2006

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