ILC Physics and Detectors
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ILC Physics and Detectors
Akiya MiyamotoKEK
8-March-2005
APPI 2005
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2A.Miyamoto , APPI2005 (8,-March-2005)
Contents
ILC overview Physics - Highlights Detector – Concept studies Summary
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3A.Miyamoto , APPI2005 (8,-March-2005)
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. GDI
GDI: Based on MOU among labs. for accelerator R&D and design Organization under ILCSC. Central team + 3 regional teams.
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4A.Miyamoto , APPI2005 (8,-March-2005)
ILC Schedule
2004.8 Adopted ‘Cold’ at IHEP, Beijing2004.11 1st ILC workshop at KEK2005.2 Decide the director and location of Central GDI
2005. Establish Regional GDIs2005.8 2nd ILC workshop at Snowmass. Decide design outline
( acc. Gradient, 1/2 tunnel, dogbone/small DR, e+ generation, etc.)2005 end Complete CDR2007 end Complete TDR, role of regions, start site selection2008 Decide the site, budget approval2009 Ground breaking2014 Start commisioning
now
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5A.Miyamoto , APPI2005 (8,-March-2005)
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 GeVLuminosity: ~2x1034/cm/s for >500fb-1 in 4 years
After Ecm upgrade, >1ab-1 in 4 years
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6A.Miyamoto , APPI2005 (8,-March-2005)
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.
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7A.Miyamoto , APPI2005 (8,-March-2005)
Physics of EW symmetry breaking
Model independent study of Higgs
4-jet 2-jet+missing 2 lepton+X
Typical Higgs signal
>105 Higgsfor 500fb-1
ILC is a Higgs Factory!
Decay mode independent Higgs search
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8A.Miyamoto , APPI2005 (8,-March-2005)
Studies of Higgs Properties
Energy scan
self coupling
VertexingTo tag b/c/
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9A.Miyamoto , APPI2005 (8,-March-2005)
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 ILC
ILC
LHC
Masses of neutralino and slepton are determined at O(0.1) GeV improves LHC’s SUSY mass meas.
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10A.Miyamoto , APPI2005 (8,-March-2005)
Cosmology and LC
WMAP data suggest dark matter
0, ?
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11A.Miyamoto , APPI2005 (8,-March-2005)
Beyond SM : Extra Dimension
Direct search
n = number of extra dimension
To be determined at ILC
Indirect search
G
f, V, H
f, V, H
e+e- HH
Reflects spin2 nature of KK graviton No SM backgrounds in HH channel ~700 events detected @1TeV, 500fb-1
if Ms=2TeV
N. Delerue, K. Fujii & N. OkadaOdagiri
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12A.Miyamoto , APPI2005 (8,-March-2005)
Masses of top, Wsin2w new physics effect in loop
energy scan near thresholdtt
Precission Physics
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13A.Miyamoto , APPI2005 (8,-March-2005)
Summary of ILC Physics
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14A.Miyamoto , APPI2005 (8,-March-2005)
Detector for ILC experiments
Good jet energy resolution calorimeter inside a coil highly segmented calorimeter
Efficient & High purity b/c tagging 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 design Philosophy
Muon detector
Calorimeter
Tracker Vertexdetector
Coil
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15A.Miyamoto , APPI2005 (8,-March-2005)
“Super” detector Jets are copiously produced at ILC.
Efficient detections of jets are crucial for physics involving W/Z/Top/H..
and e e WW ZZ
/ ~0.6E E 0.3
2 jetM
Study H to VV coupling at H.E.
LEP like ILC target5k events/4y
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16A.Miyamoto , APPI2005 (8,-March-2005)
Particle Flow Analysis
jet2 = ch
2 + 2 + nh
2 + confusion2 + threashold
2
Charged ~ 60% by tracker Gammas ~ 30% by EM cal Neutral Hadron ~10% by HD cal.
Separation of charged particle and /neutral hadron is important Separation : BL2/Rm ( if consider curvature by B)
L=Rin(Barrel) or Zin(End Cap), Rm=Effective Moliere length
B=0
E(Energy stored in Coil)~ B2L3
thereforeseparation E L
2Cal.cost LBut
If same cal. Segmentationis used
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17A.Miyamoto , APPI2005 (8,-March-2005)
Vertex tagging
To achieve high efficient and high purity b/c tagging, good vertex detector is crucial put Vertex detector as close as possible
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18A.Miyamoto , APPI2005 (8,-March-2005)
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 m and 500 m thick beam pipe at R=12 mm still satisfies the requirement of
b=5 10/(psin3/2) m
R (mm)
B (T) Pair Background (hit/mm2/train)
15 4 1.0
15 3 1.7
24 3 0.4
TRC500 beam parameters
# of fired pixels ~ 5.0 pixels/hit
Inner radius should be optimized based on physics performance using ILC parameter
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19A.Miyamoto , APPI2005 (8,-March-2005)
Detector concepts
B 5TREM 1.27m5 layers Si trackerW+Si Cal.EM seg. 0.5x0.5cm2
B 4TREM 1.68mTPCW+Si Cal.
B 3TREM 2.10mTPCW+Scinti. Cal.EM seg. 2x2cm2 or strip
All these parameters are subject to change
SiD LCD “GLD”
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20A.Miyamoto , APPI2005 (8,-March-2005)
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.
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21A.Miyamoto , APPI2005 (8,-March-2005)
Organization chart
IUPAP
ICFA(J.Dorfan)
GDIPhys.&Det. Sub-Com(J.Brau, H.Yamamoto,
D.Miller)
ILCSC(M.Tigner)
3 regional steering com.
( Asia, N.A., Europe)
Wold Wide Study
AsianLCSC
ACFAPhys.&Det. WG
R&D panelCosting panel
MDIpanel
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22A.Miyamoto , APPI2005 (8,-March-2005)
Time line of Experimental program
GDI (Design) (Construction)
TechnologyChoice
Acc.
2004 2005 2006 2007 2008 2009 2010
CDR TDR Start Global Lab.
Det. Detector Outline Documents
CDRs LOIs
R&D PhaseCollaboration Forming Construction
WWSDetector R&D Panel
TevatronSLAC B
LHCHERA
T2K
TDRs
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23A.Miyamoto , APPI2005 (8,-March-2005)
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)
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24A.Miyamoto , APPI2005 (8,-March-2005)
Backup slides
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GDI: First stage of GDO
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26A.Miyamoto , APPI2005 (8,-March-2005)
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/V for constant ΔV
Good two track separation, Larger efficiency for Ks and Λ (any long lived) large BR2 , larger R