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Uppsala University Seminar CERN, 11 February 2010

Physics Opportunities with a Multi-TeV e + e - Collider M Battaglia University of California at Santa Cruz, Santa Cruz, CA Lawrence Berkeley National Laboratory, Berkeley, CA and CERN, Geneva. Uppsala University Seminar CERN, 11 February 2010. Achieving e + e - collisions beyond 1 TeV.

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Uppsala University Seminar CERN, 11 February 2010

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  1. Physics Opportunities with a Multi-TeV e+e- Collider M Battaglia University of California at Santa Cruz, Santa Cruz, CA Lawrence Berkeley National Laboratory, Berkeley, CA and CERN, Geneva Uppsala University Seminar CERN, 11 February 2010

  2. Achieving e+e- collisions beyond 1 TeV Two-beam Acceleration Scheme CLIC Laser Wakefield Acceleration

  3. CLIC Test Facility (CTF3) to demonstrate: • drive beam generation • RF power production • two-beam acceleration and reliability of structures: INJECTOR First module Cleaning Chicane

  4. Physics Motivations for e+e- at and beyond 1 TeV Precision Study of Rare/Suppressed SM Processes: Higgs Sector: gHmm, gHbb for intermediate MH, gHHH, gttH Access New Thresholds at the Tera-scale: Identify nature of New Physics and its connection to Cosmology Probe New Phenomena beyond LHC Reach: Precision study of EW observables

  5. PhysicsandExperimentationatandbeyond1TeV Physics Signatures Independent of Physics Scenarios can we identify Physics Signatures most relevant to e+e- physics at 1 TeV and beyond ? Is the study of these Physics Signatures enabled by the Accelerator Parameters ? Reach and Accuracy Is the Physics Reach complementary and supplemental to the LHC capabilities ? Is the signature e+e- Accuracy preserved at 1 TeV and beyond ? Experimental Issues Is Particle Flow applicable to multi-TeV collisions ? Are the Forward Regions exploitable ? Is accurate Jet Flavour Tagging possible ?

  6. Physics Signatures at Multi-TeV Multi-Jet Final States Missing Energy Final States Resonance Scan Electro-Weak Fits hep-ph/0103338

  7. How is physics changing from 0.2 to 3 TeV ? s(pb) for SM Processes vs. Ecm (TeV) 3.0 TeV 0.1 TeV 0.5 TeV

  8. Observables from 0.2 TeV to 3 TeV (SM Evts) Jet Multiplicity Parton Energy B Hadron Decay Distance MB, hep-ph/0103338

  9. Precision Study of Rare/Suppressed SM Processes

  10. The Higgs Boson and CLIC WW fusion process offers significant cross section and benefits from high energies Flaecher et al. arXiv:0811:0009v2 MB, De Roeck, hep-ph/0211207

  11. TheHiggsSectoratCLIC:LightHiggsProfile Barklow, hep-ph/0312268 Ecm L 0.35 TeV 0.5 ab-1 0.50 TeV 0.5 ab-1 1.0 TeV 1.0 ab-1 3.0 TeV 2.0 ab-1 Pol: e- 80% e+ 50% BR(Hgbb) BR(Hgmm) TESLA-TDR 2001 Kuhl, Desch, LC-PHSM-2007-001 Barklow, hep-ph/0312268 MB, DeRoeck, hep-ph/0211207 MB, J Phys G35 (2008) 095005 gHHH BR(Hggg) BR(Hggg) MB, LCWS08

  12. Fermion Couplings: e+e-gneneH0g bb Large WW fusion cross section yields samples of (0.5-1) x 106 H bosons; Gain in cross section partly offset by increasingly forward production of H, still within there is a 1.7 x gain at 3 TeV compared to 1 TeV. MB, De Roeck, hep-ph/0211207

  13. Fermion couplings: e+e-gneneH gm+m- Full simulation CLIC analysis based on ILC C++ software and SiD detector model: e+e-gneneHgm+m- MB, JPhys G35 (2008)

  14. The Higgs Sector at CLIC: Heavy Higgs Profile CLIC promises to preserve LC signature capabilities for Higgs studies at large boson masses: Decay-independent Higgs observation and mass measurement in e+e-g e+e- H0 Possible sensitivity to triple Higgs coupling for heavy Higgs bosons Recoil Mass in e+e-X for MH=600 GeV s(HHnn) vs. gHHH MB, hep-ph/0103338

  15. Experimental Issues Tag and measure ~250 GeV forward electrons in presence of ggghadrons and pairs Simulation shows that background requires fast time stamping (O(10 ns)) and robust jet clustering (anti-kt algorithm) as adopted at LHC: ggghadrons CLIC 1 BX MB, hep-ph/0103338

  16. Access New Thresholds at the Tera-scale

  17. Which is the scale of New Physics ? Waiting for LHC results, many attempts to define "most likely" region(s) of parameters based on LEP+Tevatron, low energy data and Cosmology (DM and BBN):

  18. How Many Observable Particle ? 0.5 TeV tan b = 10 1.0 TeV Wh2and (g-2)m Constraints on cMSSM 3.0 TeV Ellis et al., PLB565 (2003) MB et al., Eur Phys J C33 (2004)

  19. Which is the scale of New Physics ? 1) cMSSM with constraints and m0 tuned to match WCDMh2 at various tan b values cMSSM tan b = 35 tan b = 50 tan b = 10 Ellis et al., JHEP 0605 (2006)

  20. Which is the scale of New Physics ? 2) cMSSM with 15 constraints (EW, B physics, (g-2)m and WCDMh2) 3) NUHM SUSY with 15 constraints (EW, B physics, (g-2)m and WCDMh2) Most Probable Spectrum Buchmuller et al., JHEP 0809 (2008)

  21. Which is the scale of New Physics ? allowed region largely extends towards high mass solutions 2) cMSSM with 15 constraints (EW, B physics, (g-2)m and WCDMh2) Buchmuller et al., JHEP 0809 (2008)

  22. Which is the scale of New Physics ? These scenarios indicate very large sparticle masses, even too large for detection at LHC but well suited for CLIC: 4) In scenarios with gravitino LSP, long-lived staus may form metastables states with nuclei affecting Big Bang Nucleosynthesis; Cakir et al, hep-ph/0203121

  23. SUSY Heavy Higgs Bosons: MA – tan b CLIC 3 TeV ILC/CLIC 1 TeV cMSSM Allanach et al., PRD 73 (2006)

  24. CLIC 3TeV CLIC 3TeV SUSY Heavy Higgs Bosons: MA 1) cMSSM with constraints and m0 tuned to match WCDMh2 ILC/CLIC 1TeV ILC/CLIC 1TeV Ellis et al., JHEP 0502 (2005)

  25. CLIC 3TeV SUSY Heavy Higgs Bosons: MA 5) String-inspired Large Volume Scenario SUSY with MCMC in Bayesian statistics formalism ILC/CLIC 1TeV Allanach et al., JHEP 0808 (2008)

  26. LHC/ILC/CLIC Reach in MA – tan b DM A0 Funnel Region DM A0 Funnel Region CLIC 3 TeV

  27. SUSY Heavy Higgs Bosons: MA – tan b Lower energy LC Higgs data interpretation requires excellent control of parametric and theoretical uncertainties: Droll and Logan, PRD 76 (2007)

  28. Heavy Higgs Bosons: H at 3 TeV e+e-gH+H-gtbtb at 3 TeV CLIC 3 TeV Coniavitis Ferrari, Pramana 69 (2007) Barrel ECAL Mokka SiD Large jet multiplicity gives particle overlaps in calorimeters. study distance (charged particle to closest cluster) (full G4 simulation) MB

  29. Heavy Higgs Bosons: H at 3 TeV e+e-gH+H-gtbtb at 3 TeV MH=900 GeV Coniavitis, Ferrari, PRD 75 (2007)

  30. Heavy Higgs Bosons: H0, A0 at 1 TeV Analysis of 1 TeV events with ILC Detector Study e+e-g HA g bbbb with LDC WCDMh2 gives tight requirement of ILC 1 TeV MB et al PRD 78 (2008)

  31. Heavy Higgs Bosons: H0, A0 at 3 TeV Analysis of 3 TeV events with CLIC-ILD Detector Study e+e-g HA g bbbb with full G4 sim + reco CLIC 3 TeV Coniavitis, Ferrari, Pramana 69 (2007) MB et al , CLIC09

  32. Establishing the Nature of New Physics Given limited nb. of observable particles determine the nature of new physics: Example: tell UED from SUSY SUSY UED 3 TeV 1 TeV Tait and Servant

  33. Establishing the Nature of New Physics SUSY UED kinematics production angle MB et al, JHEP 0507 (2005)

  34. The LHC SUSY Inverse Problem Given LHC data can we identify the nature of the underlying theory ? Study the inverse map from the LHC signature space to the parameter space of a given theory model: MSSM. 43026 models tested in 15-dim parameter space g283 pairs of models have indistinguishable signatures at LHC. Arkani Hamed et al, JHEP 0608 (2006)

  35. Solving the SUSY Inverse Problem at LC Consider 162 pairs indistinguishable at LHC: only 52% (85 pairs) have charged SUSY particles kinematically accessible at 0.5 TeV, 100 % accessible > 1 TeV; 79% (57 out of 73 pairs) can be distinguished at 5 s level at 0.5 TeV; 1-3 TeV data needed to extend sensitivity and solve the LHC inverse problem over (almost) full parameter space. Berger et al, arXiv:0712.2965

  36. An UED Inverse Problem Mapping UED the parameter space from measurements at 1 TeV and 3 TeV linear collider: Bhattacherjee et al., PRD78 (2008)

  37. Understand SUSY-Cosmology Connection Dark Matter Density LC precision motivated by need to match Wh2 accuracy from CMB data ( ): LCC1 LCC2 8% LCC3 LCC4 Baltz, MB, Peskin, Wiszanski, PRD74 (2006)

  38. Mass Spectrum and e+e- Pair-Production Cross Sections

  39. Implications of the CLIC Accuracies: Neutralino Relic Density Ωh2in MSSM First determine dependence of Ωh2on sparticle masses by varying only parameter under study: MB, CLIC09

  40. e+e-gc+1c-1 , mRmR, t1t1 Threshold Scans Threshold scans with 2 ab-1 at maximum energy and 2 ab-1 at 2.0-2.7 GeV MB, Blaising, CLIC09

  41. Implications of the CLIC Accuracies: Neutralino Relic Density Ωh2in MSSM Perform scan to full MSSM imposing constraints on sparticle masses as obtained from preliminary CLIC analyses; Preliminary MB, Blaising, CLIC09

  42. What if there is no Higgs ? Study strong interaction of W/Z bosons and identify resonance formation in the TeV region; Example 2 TeV resonance with 12 fb production cross section at 3 TeV, ~4 fb after acceptance cuts: including ggghadrons De Roeck, Snowmass 2001

  43. Experimental Issues 50 BX 850 Reco Trks in VTX ggghadrons background MB, CLIC2009 Charged-Neutral Particle Distance in Calorimeters ECal HCal

  44. New Resonances at CLIC Luminosity spectrum effect on mass and width reconstruction at CLIC: 5-point scan of broad resonance (3 TeV SSM Z') with ~ 1 year of data under two assumptions for luminosity spectrum (CLIC.01 and CLIC.02) MB et al., JHEP 0212 (2002)

  45. KK Resonances in ED Scenarios Observe interference between Z and g KK excitations accounting for CLIC luminosity spectrum: MB et al., JHEP 0212 (2002)

  46. Probe New Phenomena beyond LHC Reach

  47. New Physics beyond the LHC Reach Precision electro-weak observables in e+e-g ff at 1- 3 TeV Grefe, CLIC08 CERN-2004-005

  48. New Physics beyond the LHC Reach: ED Reach for ADD model scale Ms vs. integrated luminosity for 3 TeV and 5 TeV data: 5 TeV 3 TeV CERN-2004-005

  49. New Physics beyond the LHC Reach: ED, Z' MB et al, hep-ph/0112270

  50. New Physics beyond the LHC Reach: Contact Interactions MB et al, hep-ph/0112270

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