General news… Monthly meeting, CLIC physics and detector study, 24/9/2012 Lucie Linssen L. Linssen, CLIC physics and detector, Monthly 24/9/2012 1

Outline L. Linssen, CLIC physics and detector, Monthly 24/9/ Links to our recent documents CLIC energy staging in CDR Volume 3 CLIC strategy and objectives (from CDR Volume 3) Re-baselining of CLIC energy stages New activities in CLIC physics and detector study Status of LCD Notes Status future LC and CLIC physics/detector organisation

Links to our recent documents… CLIC CDR (#3), The CLIC Programme: towards a staged e + e - Linear Collider exploring the Terascale, ANL-HEP-TR-12-51, CERN , KEK Report , MPP (the order for printed copies was placed on 13/9; be patient) CLIC e + e - Linear Collider Studies, CLIC input to the update process of the European Strategy for Particle Physics: arXiv: arXiv: The Physics Case for an e + e - Linear Collider, LC input to the update process of the European Strategy for Particle Physics, ILC ESD-2012/4, CLIC-Note- 949 L. Linssen, CLIC physics and detector, Monthly 24/9/2012 3

CLIC energy staging L. Linssen, CLIC physics and detector, Monthly 24/9/ Advice: The motivation and implementation of energy staging (construction/operation) is quite new for CLIC => => read CDR #3, or CLIC input to the European strategy Making optimal use of the capacities (luminosity) of CLIC, this is best studied with a collider built in a few successive energy stages. At each energy stage, the centre-of-mass energy can be tuned down by a factor ~3 with limited luminosity loss (e.g. for threshold scans). The optimal choice of the actual energy stages will depend on the physics scenario, will be driven by 8 TeV + 14 TeV LHC results. The scenarios in CDR #3 are therefore “just examples”, worked out illustrations.

CLIC layout at 3 TeV L. Linssen, CLIC physics and detector, Monthly 24/9/2012 5

CLIC layout at 500 GeV L. Linssen, CLIC physics and detector, Monthly 24/9/ (scenario A)

Staged approach, scenario A+B L. Linssen, CLIC physics and detector, Monthly 24/9/ A B 500 GeV 1.4 TeV 3 TeV 500 GeV 1.5 TeV 3 TeV

Parameters, scenario A L. Linssen, CLIC physics and detector, Monthly 24/9/2012 8

Parameters, scenario B L. Linssen, CLIC physics and detector, Monthly 24/9/2012 9

Integrated luminosity L. Linssen, CLIC physics and detector, Monthly 24/9/ Based on 200 days/year at 50% efficiency (accelerator + data taking combined) Target figures: >600 fb -1 at first stage, 1.5 ab -1 at second stage, 2 ab -1 at third stage

Power L. Linssen, CLIC physics and detector, Monthly 24/9/ Various options for improvement have been identified

CLIC strategy and objectives L. Linssen, CLIC physics and detector, Monthly 24/9/

more remarks on energy staging… L. Linssen, CLIC physics and detector, Monthly 24/9/ For the CDR, the CLIC study always focused on the 3 TeV machine Design was optimised for 3 TeV The ultimate 3 TeV machine imposes constraints on the lower energy stages Once the desired energy stages are known => design can be optimised (with impact on e.g. cost) Re-baselining CLIC in the next project phase ( ): First stage likely to be 375 GeV (Higgs/top) With drive beam Klystron-based Later stages => needs more physics input from LHC Note: a klystron-based initial stage ~375 GeV could be more cost-effective. Technology readiness of klystron option => to be checked An initial stage at with klystrons at ~375 GeV could bring the CLIC cm energy with 1 drive beam to 1875 GeV.

“new” activities L. Linssen, CLIC physics and detector, Monthly 24/9/ While the CDR Vol.3 benchmark studies are coming to an end: A new round of benchmark studies being initiated through the analysis WG. First ideas were posted here: “Potential volunteers”: JJ,. Blaising C. Grefe T. Lastovicka J. Marshall, A. Munnich (complement Higgs  ττ), Aidan Robson (Glasgow), P. Roloff, Eva Sicking, F. Simon + MPI team, J. Strube, Nigel Watson (Birmingham) Please contact the conveners: If your name is on the list, while it shouldn’t be there If you you want to be added to the list Cost-effective ECAL study Simulation + hardware study … thinking of: Reducing number of ECAL layers Understand the need for granularity in 1 st / 2 nd part of ECAL Understand scintillator-tile option for 2 nd part of ECAL Interest for this study from: Cambridge, CERN, (DESY), MPI

2012 LCD notes, released L. Linssen, CLIC physics and detector, Monthly 24/9/ LCD-Note TitlesAuthors Mechanical design of a pre-isolator for the CLIC final focusing magnets A. Gaddi, H. Gerwig, F. Duarte Ramos, N. Siegrist Beam tests with the CALICE tungsten analog hadronic calorimeter prototype D. Dannheim, W. Klempt, E. van der Kraaij 003The physics benchmark processes for the detector performance studies of the CLIC CDR Volume 3 B. Allanach et al. (A. Munnich) 004Measurement of stau pair production at CLICA. Munnich 007Shower development of particles with momenta from 1 to 10 GeV in the CALICE Scintillator-Tungsten HCAL A. Lucaci-Timoce et al. 009Physics performances for Z’ searches at sqrt(s)=3 TeV and 1.4 TeV at CLIC JJ. Blaising, J. Wells 011Hidden-Sector Higgs Bosons at a High-Energy Electron- Positron Collider J. Collins, J. Wells 016Analysis of the behaviour of the CLIC_SiD iron return yoke during a seismic event F. Duarte Ramos

2012 LCD notes, pending L. Linssen, CLIC physics and detector, Monthly 24/9/ LCD-Note TitlesAuthors 005CLIC Detector CostingM. Breidenbach et al. (K. Elsener) 006 Measurement of chargino and neutralino pair production at a 1.4 TeV CLIC collider P. Roloff 008Correction of systematic uncertainties due to beam-beam effects in luminosity measurement in LumiCal at CLIC S. Lukic 010Measurement of higgs to tau tau at CLIC 1.4 TeVA. Munnich 012Physics performances for Scalar Electron, Scalar Muon and Scalar Neutrino searches at √s=3 TeV and 1.4 TeV at CLIC M. Battaglia et al. (JJ. Blaising) 013Prospects for the Measurement of the Top Mass in a Threshold Scan at CLIC K.Seidel, F. Simon, M. Tesar 014Measurement of the trilinear Higgs self-coupling at a 1.4 TeV and a 3 TeV CLIC No draft yet 015Higgs Mass and Cross-Section Measurements at a 500 GeV CLIC Machine J. Marshall Help with reviewing is always welcome !

2011 LCD notes, pending L. Linssen, CLIC physics and detector, Monthly 24/9/ LCD-Note TitlesAuthors 023Optimization studies of the front-end electronics of a Hybrid Pixel detector for CLIC No draft yet 032 OverlayDriver - an Event Mixing Tool for org.lcsim C. Grefe (July 2011) 033Event Reconstruction in CLIC SiD for for the CLIC CDR Monte Carlo Mass Production C. Grefe (August 2011) 034Tracking Performance of the CLIC SiD CDR DetectorNo draft yet 040Differential Luminosity Measurement using Bhabha EventsS. Poss, A. Sailer 041Measurement of the Beam Polarisation(s) Using Single- Boson Processes with Missing Energy at e−e+ Linear Colliders G. Wilson in PhD thesis

Future LC organisation L. Linssen, CLIC physics and detector, Monthly 24/9/ From the minutes of the ILCSC meeting in Melbourne: “… The Associate Director for Physics and Detectors would look after the detector collaborations, and proposals for this position could come from the community, although the final choice would be by management. ILCSC felt that Evans should work with the detector community to achieve a consensus on the Associate Director candidate and on his/her exact role… “ Feedback we received from Lyn Evans: Lyn will consult with the community to nominate a consensus candidate to the RD position (by the time of LCWS12?). The appointed RD with then initiate the process to define a suitable organisational structure.

L. Linssen, CLIC physics and detector, Monthly 24/9/ As the CDR studies are now finished… It’s a good time to give seminars about CLIC For this, we need YOU !

L. Linssen, CLIC physics and detector, Monthly 24/9/ SPARE SLIDES

physics/detector objectives: L. Linssen, CLIC physics and detector, Monthly 24/9/ Implementation study and technical demonstration phase Physics studies, following up on 8 TeV and 14 TeV LHC results Exploration of SM physics (incl. Higgs, top) and reach for new physics Adaptation of strategy for CLIC energy staging and luminosity levels Detector optimisation General detector optimisation + simulation studies in close relation with detector R&D R&D: Implementation examples demonstrating the required functionality Vertex detector Demonstration module, meeting requirements of high precision, 10 ns time stamp and ultra- low mass Main tracker Demonstration modules, including manageable occupancies in the event reconstruction Calorimeters Demonstration modules, technological prototypes + addressing control of cost Electronics Demonstrators, in particular in view of power pulsing Magnet systems Demonstrators of conductor technology, safety systems and moveable service lines Engineering and detector integration Engineering design and detector integration harmonized with hardware R&D demonstrators Challenging detector technologies, considered feasible in a 5-year R&D program Lots of work in common with ILC !

Motivation for energy staging (2) L. Linssen, CLIC physics and detector, Monthly 24/9/ Higgs physics Available luminosity increases with √s !

Motivation for energy staging (3) L. Linssen, CLIC physics and detector, Monthly 24/9/ Stage 1: ~500 (350) GeV => Higgs and top physics Stage 2: ~1.5 TeV => ttH, ννHH + New Physics (lower mass scale) Stage 3: ~3 TeV => New Physics (higher mass scale) SUSY models (I, II, III) used to illustrate physics (precision) capabilities

CLIC accelerator cost L. Linssen, CLIC physics and detector, Monthly 24/9/ GeV, unit CHF, excl. labour Labour derived from LHC example (~1.9 FTE.year/MCHF) => FTE.years (scen. B) Incremental cost (scenario B, 500 GeV => 1.5 TeV): 4 MCHF/GeV Room for improvement (~10%) with current design, + additional possibilities from optimisation of energy staging

Results of Higgs benchmark studies L. Linssen, CLIC physics and detector, Monthly 24/9/ ‘12 <= study still ongoing Details will be presented at LCWS12 !

Results of top benchmark studies L. Linssen, CLIC physics and detector, Monthly 24/9/ left right plot ‘12

Results of SUSY benchmarks, 1.4 TeV L. Linssen, CLIC physics and detector, Monthly 24/9/ CLIC CDR Vol. 3 all results with L => 1.5 ab -1 ‘12

Results of SUSY benchmarks, 3 TeV L. Linssen, CLIC physics and detector, Monthly 24/9/ all results with L => 2 ab -1 CLIC CDR Vol. 2