Concluding Remarks TILC08 Sendai 6-Mar-08 Hitoshi Yamamoto Tohoku University.

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Presentation transcript:

Concluding Remarks TILC08 Sendai 6-Mar-08 Hitoshi Yamamoto Tohoku University

H. Yamamoto, Sendai, 6-Mar-08 Black December ■ UK : 11-Dec-08, STFC Delivery Plan ‘ We will cease investment in the international linear collider ’ ■ US : Appropriations Act, Division C ITER, NOvA → 0 ‘ In the current constrained environment and without CD0 ’, ILC/SCRF → about 1/4 : Already spent!

H. Yamamoto, Sendai, 6-Mar-08 TILC08 ■ More than 200 registered By far the largest of the past Asian regional ILC workshops More than 1/2 from Europe and Americas ■ Strong political support Congressman Kawamura ’ s talk ■ Realistic progress on strategy Accelerator and detectors Scientific value of ILC remains valid

H. Yamamoto, Sendai, 6-Mar-08 LHC ■ 14 TeV CM, p+p ■ Run starts this summer ! ■ Preparation on schedule ■ Possible running scenario 14 GeV CM 2008 end : 1fb -1 /exp 2009 end : 10fb -1 /exp ~2025: 28 TeV CM?

H. Yamamoto, Sendai, 6-Mar-08 LHC SUSY search ■ Colored sparticles copiously created (they tend to be heavy) ■ Typically a long cascade of squark or gluino decay ■ Missing energy at the end (LSP) ■ Leptons (e,  ) ■ 10fb-1 searches up to ~1.5 TeV LSP

H. Yamamoto, Sendai, 6-Mar-08 LHC SUSY search ■ SUSY is detected as a global feature ■ Is this really SUSY?

H. Yamamoto, Sendai, 6-Mar-08 LHC Mass Determination ■ Signal:      j + E Tmiss ■ Endpoints: M  j  M   j  M   j  M   j  M   j ■ Solve for 4 sparticle masses CMS : 40 fb -1 Multiple solutions

H. Yamamoto, Sendai, 6-Mar-08 ILC running scenario ■ 1st stage Energy GeV, scannable e   polarization > 80% 500 fb -1 in first 4 years ■ 2nd stage Energy upgrade to ~1TeV 1000 fb -1 in 3-4 years (

H. Yamamoto, Sendai, 6-Mar-08 ILC options ■ Additional 500 fb -1 at 500 GeV in 2~3 years Depends on results from LHC, ILC phase 1. ■ e + polarization 50% or more 30% polarization is in the baseline ■ ,  e , e  e  colliders  generated by inverse Compton scattering ■ Giga-Z (running on Z-pole) 10 9 Z’s in a few months

H. Yamamoto, Sendai, 6-Mar-08 Supersymmetric Particles at ILC ■ ILC can pair-create SUSY particles etc. ■ Precision measurements of masses and mixings ■ Determination of spin, hypercharge etc. ■ Beam polarization useful. It can also reduce backgrounds

H. Yamamoto, Sendai, 6-Mar-08 Smuon detection ■ Signal :  +   and nothing. Plot acoplanarity of e + e   +  . ■ Polarized e  (R) can reduce W + W  background.

H. Yamamoto, Sendai, 6-Mar-08 Masses of smuon and LSP ■ Known smuon pair 4-momentum ■ Use the endpoints of   for simultaneous determination of and

H. Yamamoto, Sendai, 6-Mar-08 Smuon spin determination ■ Smuon production angle Quadratic solutions Wrong solution ~ flat sin 2   spin0 ■ Similarly for

H. Yamamoto, Sendai, 6-Mar-08 SUSY parameter determination ■ Charginos are mix of Wino and Higgsino with mass terms : ■ Use polarized beam (e - R ) Only Higgsino component of chargino contribute to chargino pair creation Right-handed selectron pair production depends on Bino in S channel only ■ Perform global fit of to

H. Yamamoto, Sendai, 6-Mar-08 SUSY parameters (cont ’ d) ■ E cm = 500 GeV, 50 fb -1 ■ Serves as a test of GUT relation (or other mechanism) ■ Lagrangian reconstruction

H. Yamamoto, Sendai, 6-Mar-08 Dark Matter ■ Key question: can it explain the ‘ 23% ’ ? (relic density) ■ Production + annihilation rate → relic density ■ Need to know all interactions contributing to LSP annihilation Relic density estimation by LHC and ILC (mSUGRA SPS1a)

H. Yamamoto, Sendai, 6-Mar-08 Higgs at ILC ■ Measurement of Higgs mass and production rate - independent of Higgs decay modes ■ Then detect Higgs decays - absolute Brs (including invisible mode) ■ Tagged Higgs Factory! Golden channel : ‘ Higgs-straulung ’

H. Yamamoto, Sendai, 6-Mar-08 Higgs coupling measurements SM Higgs : coupling  mass

H. Yamamoto, Sendai, 6-Mar-08 Deviations from SM (By S. Yamashita) SUSY (2 Higgs Doulet Model) Extra dimension (Higgs-radion mixing)

H. Yamamoto, Sendai, 6-Mar-08 Measurement of Higgs parameters ■ Higgs mass  (m h ) = 40 MeV ■ Higgs spin Threshold scan Higgs decay distribution Zh angular dist. ~ sin 2  if J=0+

H. Yamamoto, Sendai, 6-Mar-08 Strategy ■ Maintain momentum ■ Focus on critical R&Ds ■ Get all the help we can get ■ Prepare for LHC results

H. Yamamoto, Sendai, 6-Mar-08 GDE Timeline ■ TDP I : 2010 Technical risk reduction Cost risk reduction Global design ■ TDP II : 2012 RD unit test (KEK) Complete necessary technical designs (exceptions) Project plan by consensus ■ Detailed engineering will follow before construction

H. Yamamoto, Sendai, 6-Mar-08 Collaborations ■ XFEL, US generic SCRF, Project-X SCRF ■ CLIC Components (Sources, DR, BDS, etc.) Detector CERN expertise → ILC ILC experience (costing) → CLIC Enhances credibility of each (broader community)

H. Yamamoto, Sendai, 6-Mar-08 Detector Timeline ■ Detector Design Phase I : 2010 Focus on critical R&Ds LOI validation by IDAG (March LOI deadline) Update physics performance MDI ■ Detector Design Phase II : 2012 React to LHC results Confirm physics performance Complete necessary R&Ds Complete technical designs Cost (reliable)

H. Yamamoto, Sendai, 6-Mar-08 ILCSC FALC GDE IDAG LoI- representative Common task representative MDI-D R&D panel Software panel Physics Panel Regional Contacts WWS organizers RD Executive Board R&D Collab. PAC Phys.&Exp.Board Engineering Tools Outreach Panel Th’s LoIALoIA LoIBLoIB LoICLoIC IR Integration

H. Yamamoto, Sendai, 6-Mar-08 Responding to LHC ■ Systematic studies needed When are we likely to know what from LHC? Possible LHC discovery scenarios For each scenario What physics modes to study at ILC What kind of machine to build What kind of detector to build Priorities and timescale Cost and political realities to be included

H. Yamamoto, Sendai, 6-Mar-08 Responding to LHC ■ Rethinking of the machine parameter will be needed. Energy (250 GeV, 360 GeV, 500 GeV, 800 GeV … ) Luminosity Upgrade path ■ Accelerator and physics/detector community should have close and intensive discussions Cost and politics GDE + the RD structure (we need name)

H. Yamamoto, Sendai, 6-Mar-08 Coming workshops ■ GDE meeting - ILC conventional facilities and siting workshop Dubna, June 4-6, 2008 ■ ECFA workshop Warsaw, June 6-9, 2008 ■ CLIC08 workshop CERN, Oct 14-17, 2008 ■ LCWS workshop Chicago, Nov 16-20, 2008

H. Yamamoto, Sendai, 6-Mar-08 Summary ■ Black december: No domino effects seen. ■ We need to focus R&Ds in accelerator and detectors ■ Open collaborations with CLIC and other projects ■ Establish organizational mechanism to respond to LHC results, and start systematic preparation. Accelerator + Physics/Detector

H. Yamamoto, Sendai, 6-Mar-08 ■ Administrative support Otsuka, Toyomura, Shirakata, Miura ■ Technical support Takayama, Nakajima, Hanada ■ Students Horii, Ito, Kusano, Sasaki, Itagaki, Okamoto, Sato, Suzuki, Yoshida ■ Faculty/Staff Sanuki, Nagamine, Tamae, Takubo ■ Communicators/public relations Takahashi, Kobayashi, Barbara, Perrine

H. Yamamoto, Sendai, 6-Mar-08 ■ Vishnu Zutsi G.P.Yeh, Marcel Demarteau Please see the registration desk before you leave.