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Common Benchmarks for FCC P hysics

Common Benchmarks for FCC P hysics. John Ellis King’s College London & CERN @ FCC- ee /TLEP7 Workshop. Phenomenological Working Groups. Overall coordination: JE, Christophe Grojean Match theory predictions to FCC- ee experimental precisions

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Common Benchmarks for FCC P hysics

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  1. Common Benchmarks forFCC Physics John Ellis King’s College London & CERN @ FCC-ee/TLEP7 Workshop

  2. Phenomenological Working Groups Overall coordination: JE, Christophe Grojean • Match theory predictions to FCC-ee experimental precisions • How to discover new physics in precision measurements, in rare decays (Z, W, t, H, b, c, t, …), in rare or invisible processes • Set up the framework for global fits and understand the complementarity with other colliders (LHC, FCC-hh, in particular) Precision EW calculations SvenHeinemeyer QCD and gg Physics (Joint exp/th) Peter Skands Flavour Physics (Joint exp/th) JernejKamenik Model Building and New Physics Andreas Weiler Synergy with FCC-hh physics Linear collider physics, LEP physics HF physics Global Analysis, Combination, Complementarity JE

  3. Towards Benchmarks for FCC Studies Proposed physics topics to be used in the study of synergy/complementarity among experiments at FCC-hh/ee/eh • Higgs physics: • precision studies • higher-dimensional operators, composite Higgs • rare and exotic decays • multiple Higgs production • extra Higgs bosons •  EW/SM precision issues • parameter measurements (mt, mW) • higher-order EW corrections • 3 and 4 gauge boson (anomalous) couplings • top (anomalous) couplings • New physics related to EWSB: • WW scattering • supersymmetry • extra dimensions • composite models • Rare flavour-changing processes: • Rare H decays • Rare Z decays • Rare top decays • charm/bottom flavor studies • lepton-flavour violation • Extensions of the SM: • extra vector-like fermions • SU(2)R models • leptoquarks • Interface with cosmology: • dark matter • baryogenesis • right-handed/(almost) sterile neutrinos • QCD: • Perturbation theory • Modelling final states LHC  HL-LHC  FCC-ee  FCC-hh (eh) Alain, Patrick, Michelamneglo, John + …?

  4. The Twin Frontiers of FCC-eePhysics Precision Measurements Rare Decays Direct searches for new physics Many opportunities Z: 1012 b, c, τ: 1011 W: 108 H: 106 t: 106 • Springboard for sensitivity to new physics • Precision H studies • Precision Z studies • Theoretical issues: • Higher-order QCD • Higher-order EW • Mixed QCD + EW

  5. Precision FCC-eeMeasurements Precision Higgs Precision Electroweak

  6. Possible FCC-eePrecision Measurements

  7. What else is there? Supersymmetry • Successful prediction for Higgs mass • Should be < 130 GeV in simple models • Successful predictions for couplings • Should be within few % of SM values • Naturalness, GUTs, string, … (???)

  8. 2012 20/fb Scan of CMSSM Buchmueller, JE et al: arXiv:1312.5250 p-value of simple models ~ 5% (also SM)

  9. LHC Reach for CMSSM Susy Confronted with likelihood analysis of CMSSM O. Buchmueller, JE, K. de Vrieset al.

  10. Impact of LHC Precision Hon CMSSM H to WW H to WW constraint on (m0, m1/2) plane in CMSSM: All points within one current σof low-mass best-fit value O. Buchmueller, JE, K. de Vrieset al.

  11. Impact of FCC-eePrecision H on CMSSM H to WW H to WW constraint on (m0, m1/2) plane in CMSSM: Points within one, two, three TLEP σof low-mass best-fit value O. Buchmueller, JE, K. de Vrieset al.

  12. Impact of FCC-eePrecision H on CMSSM Estimate of (m0, m1/2) in CMSSM on basis of precision Hmeasurements with low-mass best-fit central values O. Buchmueller, JE, K. de Vrieset al.

  13. Impact of LEP Precision Z on CMSSM ΓZ ΓZ constraint on (m0, m1/2) plane in CMSSM: All points within one current σof low-mass best-fit value O. Buchmueller, JE, K. de Vrieset al.

  14. Impact of FCC-eePrecision Z on CMSSM ΓZ ΓZ constraint on (m0, m1/2) plane in CMSSM: Points within one, two, three TLEP σof low-mass best-fit value O. Buchmueller, JE, K. de Vrieset al.

  15. Impact of FCC-eePrecision Z on CMSSM Estimate of (m0, m1/2) in CMSSM on basis of precision Zmeasurements with low-mass best-fit central values O. Buchmueller, JE, K. de Vrieset al.

  16. Impact of FCC-eePrecision on CMSSM One-dimensional likelihood functions in CMSSM if precision measurements with low-mass best-fit central values: compare masses with LHC measurements, Test SUSY at the loop level O. Buchmueller, JE, K. de Vrieset al.

  17. Comparison with LHC Measurement • Consider squark and gluino pair production at low-mass best-fit point • Simulate with PYTHIA + DELPHES • Estimate 5 to 15% jet energy resolution • Assume 300/fb @ LHC @ 13 TeV • Fit data with template: estimated mass resolution ~ 10 to 15% • Overall mass uncertainty ~ 20% • Test SUSY at the loop level O. Buchmueller, JE, J. Marroucheet al.

  18. Impact of HL-LHC on CMSSM Assume no SUSY @ HL-LHC: current precision measurements with high-mass best-fit values O. Buchmueller, JE, K. de Vrieset al.

  19. Impact of FCC-eePrecision on CMSSM One-dimensional likelihood functions in CMSSM if precision measurements with high-mass best-fit central values: Predict masses for FCC-pp measurements O. Buchmueller, JE, K. de Vrieset al.

  20. Towards a ‘no-lose’ theorem for FCC-hh What Parts of High-Mass CMSSM Parameter Space are Allowed? • Imposing dark matter density constraint • Focus-point strip: • A0 ~ 0, large m0/m1/2 • Extends to m1/2 ~ 4 TeV • Neutralino has Higgsino mixture • Truncated by mh HE-LHC LHC 3000 LHC 300 LHC 8 TeV O. Buchmueller, JE, K. Olive et al.

  21. Towards a ‘no-lose’ theorem for FCC-hh What Parts of High-Mass CMSSM Parameter Space are Allowed? • Imposing dark matter density constraint • Stop coannihilationstrip • A0 ~ 3 m0, large m0/m1/2 • Extends to m1/2 ~ 13 TeV • Very small mass difference: mstop – mχ • mhvery uncertain HE-LHC LHC 3000 LHC 300 LHC 8 TeV O. Buchmueller, JE, K. Olive et al.

  22. Exploring the Focus-Point Strip • Limited range compatible with mh • Current precision EWPO measurements insensitive O. Buchmueller, JE, K. Olive et al.

  23. Exploring the Stop Coannihilation Strip • Compatible with LHC measurement of mh • May extend to mχ = mstop ~ 6500 GeV Current limits (monojets), MET LHC 300 (monojets), MET LHC 3000 (monojets), MET HE-LHC (monojets), MET 100 TeV (monojets), MET

  24. Towards Benchmarks for FCC Studies Proposed physics topics to be used in the study of synergy/complementarity among experiments at FCC-hh/ee/eh • Higgs physics: • precision studies • higher-dimensional operators, composite Higgs • rare and exotic decays • multiple Higgs production • extra Higgs bosons •  EW/SM precision issues • parameter measurements (mt, mW) • higher-order EW corrections • 3 and 4 gauge boson (anomalous) couplings • top (anomalous) couplings • New physics related to EWSB: • WW scattering • supersymmetry • extra dimensions • composite models • Rare flavour-changing processes: • Rare H decays • Rare Z decays • Rare top decays • charm/bottom flavor studies • lepton-flavour violation • Extensions of the SM: • extra vector-like fermions • SU(2)R models • leptoquarks • Interface with cosmology: • dark matter • baryogenesis • right-handed/(almost) sterile neutrinos • QCD: • Perturbation theory • Modelling final states Alain, Patrick, Michelamneglo, John + …?

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