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10 March 2013 Aspen Winter School Higgs Quo Vadis

The Rising Sun of the Linear Collider. 10 March 2013 Aspen Winter School Higgs Quo Vadis Department of Physics, School of Science, and International Center for Elementary Particle Physics, The University of Tokyo Chair: High Energy Physics Committee of Japan Sachio Komamiya.

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10 March 2013 Aspen Winter School Higgs Quo Vadis

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  1. The Rising Sun of the Linear Collider 10 March 2013 Aspen Winter School Higgs Quo Vadis Department of Physics, School of Science, and International Center for Elementary Particle Physics, The University of Tokyo Chair: High Energy Physics Committee of Japan Sachio Komamiya

  2. There was a revolution in particle physics！ The 1974 November RevolutionDiscovery of J/ψ （charm quark） Gauge Bosons Quarks Higgs Boson Leptons J/ψ＝ｃｃ　bound state It becomes evident even for experimental physicists that quarks and leptonsare the elementary particles of the same level. ⇒ base of The Standard Model e+e-→ψ SLAC Richter et al. J→ e+e-BNLTing（丁）et al.

  3. Eve of the Revolution ICHEP 1974 Summer Fermilab J.Ellis B.Richter

  4. Until 4th July 2012, for more than 20 years, we keepagitatingthat a Revolution in the field of particle physics is inevitable. ⇒ Discovery of “Higgs Boson” = The July revolution has started ⇒ This is just a start of an enormous revolutionary era overwhelming the Standard Model = the Ancien Regime.

  5. Higgs Boson mass is responsible for a big branching in the particle physics history ～125 GeV Higgs Boson is categorized as a light Higgs Boson Light Higgs Boson Elementary Higgs Boson Supersymmetry ? Composite Higgs Boson Technicolor etc. ??? Heavy Higgs Boson

  6. Supersymmetry (SUSY) solves miltiple problems FermionsBosons Supersymmetric partner of electron selectron spin = 0 electron spin =1/2 Wave function of spin1/2 Fermion ・　Stabilization of Higgs Boson Mass due to a cancellation ⇒Numbers of Fermion and Boson fields are identical ~ + f f _ h h h h ・ The lightest SUSY particle is a good candidate of the Dark Matter ⇒ We gain the understanding of the structure of the universe ・　SUSY is a space-time symmetry It plays a crucial role for the unification of 3 forces with gravity Number of extra-dimensions in the string theory is determined

  7. From Higgs to the Universe Investigation of Higgs boson (scalar particle has the same quantum numbers as for the vacuum) can be the zeroth step to understand inflation of the universe and dark energy.

  8. pp-collision　ｖｓ　e+e− collision Electron-positron collider Ex. Higgs Boson μ＋μ- Ｚ Electron and positrons are pont-like elementary particles ⇒Clean environment Process is simple Prediction： O(0.1%) - e Z - e + H bb Proton-Proton Collider Proton is acomposite particle ⇒ Complicated process NNLOO(10%) High radiation High event rate ⇒need a high tech detector hadrons p g t H - g bb p hadrons

  9. Propaganda plot of LHC for MEXT LHC overlooks new phenomena including Higgs Boson and SUSY

  10. Actual situation would be …….. LHC overlooks new phenomena including Higgs Boson and SUSY

  11. Since LHC physicists are excellent LHC overlooks new phenomena including Higgs Boson and SUSY

  12. Story of Top Quark and Higgs Boson Importance of interplay between hadron and e+e- colliders Higgs mass is restricted into a narrow mass range using precise top mass and LEP/SLC electro-weak data 114 GeV <MH< 160 GeV From precise electro-weak measurements at LEP, top mass was predicted Discovery to Top Precise Measurement of Top mass at the TEVATRON ~ Discovery of “Higgs” at LHC Higgs Z Z Z Z Precise measurements of Higgs properties at ILC top

  13. Limit of High Energy Circular e+e- Colliders Reaction is simple, experiment is cleanbut… Electronand positrons loose energy due to synchrotron radiation Energy loss per trun ΔE is given by ΔE ∝ （E/m）４/Ｒ E：particle energy ｍ：particle massＲ：radius Like a bankruptcy by loan interest E,m ２Ｒ Recover the energy loss and obtain higher collision energy （１）Use heavier particle (proton mass/electron mass＝1800）⇒LHC （２） Larger radius⇒　ＬＥＰ（２７ｋｍ）　⇒large radius

  14. Electron Positron Linear Collider is inevitable Large radius R⇒Ultimate radius R=∞　！　 Straight beam line ⇒　No synchrotron radiation 　（Linear Collider） e- e+ Electrons are accelerated from one side positon from the other side. Collide the beams at the center Reduce construction cost ⇒　High acceleration gradient Reduce running cost (electric power) ⇒　Squeeze the beam size as small as possible at the interaction point 　　　⇒ round beam is unstable ⇒　very flat beam

  15. International Linear Collider ：Ｆ１-machine Technical Design Report has been issued end ２０１２ Detector ~ 1km Damping Ring ~３0 km SC Accelerator e- e+ ～30 km

  16. TDR design of ILC for Ecm = 500 GeV Tunnel design for Mountain Range site

  17. Cross Sections ILC σ (fb) e+e− cross sections LHC Tevatron LEP # events for L=500 fb-1 √s (GeV)

  18. Precise measurement of Higgs Boson ⇒Deduce Principal Low in the Nature Higgs Boson 5 ILC in the first phase is the Higgs Boson Factory O(10 ) such events will be collected and studied. Origin of mass Structure of the ‘vacuum`. - - - + + e e Z + H e e + b b

  19. Recoil Mass Measurement ILC TDR, √s=250 GeV, L=250 fb−1 Reconstruct Zl+l− independent of Higgs decay sensitive to invisible Higgs decays Model-independent, absolute measurements (Ze+e−,μ+μ− combined): ΔmH ≤ 32 MeV σZH ≤ 2.5% gHZZ ≤ 1.2% gHZZ

  20. Higgs Measurements at ILC (1) 350 GeV~ WW fusion 250 GeV~ Higgs-strahlung ILC TDR, mH=125 GeV, BRs from LHC HXSWG assumed.

  21. Higgs Measurements at ILC (2) t H 500 GeV~ Higgs Self-Coupling 500 GeV~ Top Yukawa Coupling t H H H H ILC TDR, mH=125 GeV, BRs from LHC HXSWG assumed. Higgs is reconstructed in the hbb mode only.

  22. Higgs Couplings at ILC 250 GeV~ Higgs BR via Higgs-strahlung t 350 GeV~ Higgs BR via WW fusion H t M. Peskin 500 GeV~ Top Yukawa Coupling LHC 14 TeV 300 fb-1 ILC 250 GeV 250 fb-1 500 GeV 500 fb-1 1TeV 1000fb-1 Measurement of σ×BR  Input to global fit  Extract Higgs couplings Exploit LHC / ILC synergy. M. Peskin hep-ph 1207.2516 Deviations from SM prediction is expected to be small O(%) level

  23. Impact of Precise Measurement A. Wagner COBE 1990 Angular resolution = 10° Temperature fluctuation 10-5K WMAP 2003 Angular resolution=10’ Age of the Universe =13.69±0.13 Gyr Polarization measurement

  24. ILC Detector R&D Tanabe, ICEPP • Vertex Detector: pixel detectors & low material budget • Time Projection Chamber: high resolution & low material budget,MPGD readout • Calorimeters: high granularity sensors, 5x5mm2 (ECAL)、3x3cm2 (HCAL) Return Yoke HCAL Coil ECAL TPC Forward components ETD Beam line SET VTX SIT FTD • Particle Flow Algorithm • Charged particles  Tracker, • Photons  ECAL, Neutral Hadrons  HCAL • Separate calorimeter clusters at particle level • use best energy measurement for each particle. • offers unprecedented jet energy resolution ~15 m State-of-the-art detectors can be designedfor ILC

  25. Possibility of Japan to be a host of ILC Some facts to believe Japan to host ILC, if we work very hard for the next few years. 1)Discovery of “Higgs Boson” at LHC 2)TDR of ILC project will be issuedNOW. 3)CERNis expected to work on LHCupgrade Support from international community 4) Supports of Political and Industrial sectors ・Advanced Accelerator Association of Japan 5) Started site studies with dedicated funding 6)Agreement in the HEP community ・Report from subcommittee of future HEP projects of Japan (March 2012) 　 ・Phased Excecution of ILC（October 2012) 北上 Kitakami 背振 Sefuri

  26. A Proposal for a Phased Execution of the International Linear Collider Project The Japan Association of High Energy Physicists (JAHEP) endorsed the document on 18 October 2012 ILC shall be constructed in Japanas a global project based on agreement and participation by the internationalcommunity. Physics : Precision study of “Higgs Boson” , top quark, “dark matter” particles, and Higgs self-couplings, Scenario : Start with a Higgs Boson Factory ~250 GeV. Upgraded in stages up to a center-of-mass energyof~500 GeV, which is the baseline energy of the overall project. Technical extendability to a 1 TeV region shall be secured. Japan covers 50% of theexpenses (construction) of the overall project of a 500 GeV machine. The actualcontributions, however, should be left to negotiations among thegovernments.

  27. Union of Diet members to promote a construction of international laboratory for LC 31st July 2008established a suprapartisan ILC supporters Akihito Ohhata、Koji Omi、Ikuo Kamei, Takeo Kawamura, Tetsuo Saito, Yoshiaki Takagi, Norihiko Tamura, Masamitsu Naito, Yoshihiko Noda, Yukio Hatoyama、 Fumuhiro Himori, Kosuke Hori, Eisuke Mori, Kaoru Yosano、Hidekatsu Yoshii Renewed on 1st Feb 2013 proposers New Officers (October 2011〜) Supreme advisorKaoru Yosano PresidentYukio Hatoyama Acting president Takeo Kawamura Secretary-generalTatsuo Kawabata Deputy Tatsu Shionoya Dupty PresidentTetsuo Saito President of bureau Norihisa Tamura Director of bureauKeisuke Tsumura Deputy Takeshi Kai (July 2008〜) President Kaoru Yosano Deputy Yukio Hatoyama Secretary-GeneralTake Kawamura 、 Yoshihiko Noda Director Norihisa Tamura Masamitsu Naito June 2008established an industry-academy collaboration Advanced Accelerator Association of Japan (AAA) AAA homepagehttp://aaa-sentan.org Supreme advisorKaoru Yosano President EmeritusMasatoshi Koshiba President Takashi Nishioka (Mitsubishi HI） Trustee Atsuto Suzuki （KEK) 〃Akira Maru （Hitachi）、 〃 Yoshiaki Nakaya （Mitsubishi Electric） 〃Yasuji Igarashi （Toshiba）、 〃 Akira Noda （Kyoto University） 〃Keijiro Minami （Kyoto ceramic） Auditor Sachio Komamiya (University of Tokyo） Industry: 85companies （Mitsubishi HI、Toshiba、Hitachi、Mitsubishi Electric、Kyoto Ceramic et al.） Academy: ３８ institutes （KEK，Tokyo、Kyoto、Tohoku, Kyushu, RIKEN, JAEA et al.) as of December 2011 December 2011at AAA symposium

  28. History of International LC Community 1980s LC accelerator R&D starts at DESY, KEK, SLAC , CERN, … 1990s 5 different designs: TESLA , S-band, C-band, X-band, CLIC 1998 World-wide-studies of physics and detector for LCs was established 2003 ILC Steering Committee (ILCSC) formed 2004 Selected superconducting RF for the main linac 2005 Global Design Effort (GDE) formed (Barry Barish) 2007 Reference Design Report 2009 LOI process validated two detector concepts (ILD and SiD) 2012 Technical Design Report 2013 Feb. LCC formed (Lyn Evans) 2013 June TDR review will be completed The Jump-Start Scenario (Very optimistic but not impossible) 2013 July Site evaluation by scientists will complete in Japan 2013 fall New organization within Japanese government is expected to be formed and in preparation to bid to host the ILC 2014-15 Intergovernmental negotiation Linear Collider Collaboration (Lyn Evans and ILC sector) continue to refine the design and organization of the global lab for ILC 2015 International Review of the ILC project (LHC physics @13-14 TeV) 2015-16 Construction starts 2026-27 Commissioning of the ILC machine

  29. Energy frontier Colliders Europe Asia Americas ISABELLE ⇒ RHIC PETRA PEP TRISTAN SLC HERA DORIS SPEAR ISR TEVATRON SppS SSC LEP/LHC

  30. Energy Frontier Colliders Future Colliders must be planned and constructed by global efforts Europe Asia Americas ISABELLE PETRA PEP TRISTAN SLC HERA DORIS SPEAR ILC ISR SppS TEVATRON SSC LEP/LHC

  31. Quest for Birth-Evolution of Universe Quest for Unifying Matter and Force International Linear Collider（ILC） Lepton KEK DG is keep showing this ugly slide Quark Lepton CPAsymmetry Scientific Activities Technology Innovation Encouraging Human Resources Beyond Standard Physics Power-Upgrade Super-KEKB J-PARC LHC KEK-B Quark CP Asymmetry nt [Origin of Matter] nm Quest for Neutrinos ne Quest for 6 Quarks [Origin of Force] Higgs Particle[Origin of Mass]

  32. Quest for Birth-Evolution of Universe Quest for Unifying Matter and Force International Linear Collider（ILC） Lepton Quark Lepton CPAsymmetry Scientific Activities Technology Innovation Encouraging Human Resources Beyond Standard Physics Power-Upgrade Super-KEKB J-PARC LHC KEK-B All roads lead to ILC Quark CP Asymmetry nt [Origin of Matter] nm Quest for Neutrinos ne Quest for 6 Quarks [Origin of Force] Higgs Particle[Origin of Mass]

  33. Higgs Branching Ratios

  34. Ordinary particles SUSY partners Gauginos Ordinary particles Gauge bosons Gauge bosons Scalar Fermions Dark Matter Candidates Leptons and Quarks Leptons and Quarks Higgs bosons Higgs boson Higgsinos Higgs and SUSY are undiscovered Supersymmetry (SUSY) ・ Every Elementary Particle has SUSY partner, their masses 　＜ TeV ⇒ The value of the SUSY discovery is that for the Anti-particles ～

  35. Polarized (90% e-R) Power of electron polarization at ILC Scalar muon production μ beam μ θacop μ ~ μR Background signal Unpolarized

  36. ILC budget (German version)（for a host country/region） Euro/Yen/Dollar per person per year Bier vom Fass Eine Wurst mit Sauerkraut ~10 years Since cost review of TDR is not completed I cannot tell you the price now.

  37. Fingerprinting BSM MSSM / Type II 2HDM Singlet Mixing t Γh c τ b W Z H +15% t Γh c τ b W Z H +15% +10% +10% +5% +5% Higgs Coupling Deviation 0% Higgs Coupling Deviation 0% -5% -5% -10% -10% -15% -15% Composite Higgs Electroweak Baryogenesis t t Γh c τ b W Z H Γh c τ b W Z H +15% +15% +10% +10% +5% +5% Higgs Coupling Deviation Higgs Coupling Deviation 0% 0% -5% -5% -10% -10% -15% -15% If you want to know more on Higgs at ILC, please read TDR volume 1

  38. Coupling measurements at ILC Self-coupling Top Yukawa coupling Gauge Coupling SUSY Yukawa coupling

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