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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

Snowmass2005 report

2005/09/26

H. Matsunaga

GLDCAL meeting

snowmass05
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
sessions
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
special sessions etc
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
accelerator part
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
fourth concept
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 ?
detector session
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.)
slide9

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

slide10

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

slide11

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

slide12

Measurement

Directly related

To the TOTAL WIDTH

Of the Higgs !!!

8 to 10%

of the energy !!

Region for

LDC, SiD

pad size is more important than moliere radius
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)

granularity study
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 ?

cal session
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
calice tile hcal
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
slide17
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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