People A Caldwell X Project Chen A Frey

People: A. Caldwell, X. Project Chen, A. Frey, A. Raspereza, Review 2005 R. Settles , D. Britzger (summer student) et al. Ariane Frey B. & friends from HLL (L. Andricek, G. Lutz, H. -G. Moser)

The Physics case - Higgs – if there – will have been discovered at the LHC However, the real task is to establish the mechanism of EW symmetry breaking. First measurements of Higgs properties possible: • Mass: 0. 1 – 0. 4% • Production rates: 10 -20% • Ratios of couplings: W/Z, W/t: 10 -20% • model-independent measurements of absolute couplings impossible !!

The Physics case - Higgs-strahlung WW fusion • select di-lepton events consistent with Z ee/μμ • calculate recoil mass: model independent, decay-mode independent measurement!

Higgs at the ILC Higgs mass measurement to sub-permille precision Determination of quantum numbers (spin, CP ) The holy grail: Higgs self coupling SUSY – complement the SUSY spectrum discovered at LHC EW precision measurements Extra dimensions e+e- G

Machine Baseline Configuration Aug 2004: Technology decision: COLD superconducting à la TESLA chosen 2 tunnels, following earth’s curvature

ILC Timeline 2004 2005 2006 2007 2008 GDE (Design) Technology Choice Done! 2009 2010 (Construction) Acc. CDR TDR Start Global Lab. Detector Outline Documents CDRs LOIs Detector R&D Panel Detector R&D Phase Collaboration Forming Construction Tevatron SLAC B HERA LHC T 2 K

Detector Concepts

Performance Goals Z recoil Momentum resolution: (1/p) = 7 x 10 -5/Ge. V (1/10 x. LEP) M(μμ) < 0. 1 Z MH dominated by beamstrahlung WW, ZZ pairs equivalent to some 40% luminosity gain 60%/ E 30%/ E Target region Optimize design for Particle Flow: Resolution vs. granularity

Vertex Detector for ILC High resolution pixel detector, 5 layers, innermost layer at r=1. 5 cm R&D ongoing in various directions: - Flavour tag (b/c) for Higgs BR’s - τ lifetime tag - improve momentum resolution+ pattern recognition for main tracker - CCDs - CMOS pixels - DEPFET - So. I Pixels radial dist. from IP (cm) Driving physics: pair background z distance from IP (cm) Critical issues: - fast (column parallel) readout - beamstrahlung pairs (high B-Field (4 T) helps) - ultra-thin detectors (0. 1%X 0/layer) - power consumption/cooling (material)

DEPFET @ HLL One option for vertex technology § Good signal/noise § Radiation hard § Low power – no active cooling necessary (~ 3 W for full vertex detector) § Low material budget (thinning) r= 15. 5 m m § Design very flexible • Competition: CCD, MAPS, So. I… 8 Modules in Layer 1

Vertex Module

Simulation of Vertex Det (GEANT 4) standard for DEPFET D. Britzger Simple cylinders

Digitization for Vertex Detector ~ normal incidence Shallow angle 25 m × 25 m pixel size A. Raspereza Need to add noise, tune with test beam data !

Time Projection Chamber MPI has built a small TPC prototype that has been successfully operated with wire readout, GEM and Micromegas in testbeams (2005 at KEK) P~140 μm D~60 μm Activity is phasing out at the MPI In general: next step is to build a large prototype Pixel readout under study (MEDIPIX)

EUDET Sixth Framework Program of the EU “Integrated Infrastructure Initiative” not at detector R&D program in the narrow sense but provides for development of e. g. testbeam infrastructure Initiative started in March 05, program approved by EU, start 1. 1. 2006 for 4 years 31 partner institutes, 7 M Euro EU contribution MPI involved in pixel beam telescope with DEPFET 1 position for Ph. D student funded by EU (based at HLL)

Backup Slides

Beam structure 193 ns bunch-to-bunch approx. 1 ms bunch train Target Luminosity: few 1034 cm-2 s-1 s× L = Event rate L N 1 · N 2 / A

Beamstrahlung This is not LEP (nor SLC)! - Beamstrahlung e- e+ hard ’s radiated by intense electric field = Beamstrahlung RMS Energy Loss: Minimize while keeping chosing flat beams (luminosity!) constant by y x

Simulation (GEANT 4) GLD, … Parameter List Si. D, … LCD, … Si. D, … My. SQL+CGA XML Std. Hep Jupiter root Mokka LCDG 4 CGD LCDD SLIC sio LCIO: Sim. Tracker. Hits/Sim. Caloimeter. Hits

Two strong partners LHC High energy ILC High precision