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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


Snowmass

Snowmass


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.)


Snowmass2005 report

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


Snowmass2005 report

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


Snowmass2005 report

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


Snowmass2005 report

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


Snowmass2005 report

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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