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Extra Dimensions and Compositeness in μ + μ -

Extra Dimensions and Compositeness in μ + μ -. Dimitri Bourilkov University of Florida Florida Contribution to Physics TDR SUSY/BSM Review, CMS Week, September 2004, CERN, Geneva. Contact Interactions, ED etc. general framework for new int.: scale   s (virtual effects)

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Extra Dimensions and Compositeness in μ + μ -

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  1. Extra Dimensions and Compositeness in μ+μ- Dimitri Bourilkov University of Florida Florida Contribution to Physics TDR SUSY/BSM Review, CMS Week, September 2004, CERN, Geneva

  2. Contact Interactions, ED etc. general framework for new int.: • scale   s (virtual effects) or resonances if   s • coupling g (convention g2 = 4) • we constrain g / • operators with canonical dimension N > 4  coupling 1/MN-4 • |ij| < 1 helicity amplitudes ED & Compositeness in μ+μ-

  3. Extra dimensions from e+e- and γγ LEPcombined (DB):MHewett > 1.4 (1.2) TeV (=1); D0 2004 ~ 1.5(1.4) TeV Contact interactions LEP: scales up to 19 TeV (leptons) or 13 TeV (hadrons – bb) Z’ LEP: m > 0.434 – 1.787 TeV (diff. models) TEVATRON: m >~ 800 GeV Size of the electron: re < 1.4  10-19 m LEP quark: r < ~10-18 m HERA, r < 5.6  10-19 m CDF 1997 From the LHC/LC workshop: LHC – contact interactions (LL) up to 30 – 50 TeV LHC / LC workshop hep-ph/0305125 Scales for New Physics ED & Compositeness in μ+μ-

  4. High-mass Muon Pairs • PYTHIA, HERWIG; use of C++ generators for ED under study • TeV muons: • Simulate with GEANT4/OSCAR: • Bremsstrahlung, e+e-pair production, muon-nucleus interactions (showering), punch-through etc. • FAMOS for TeV muons? • Will need it to cover the large parameter space of scales, masses, couplings etc. (full simulation for the background and selected scales for the signals) • ORCA Reconstruction (collaborate with UCLA, Dubna, Warsaw …) • Main background: Drell-Yan μ+μ- and +- (collaborate with SM group); other: WW, cc, bb, tt, fakes, cosmics … ED & Compositeness in μ+μ-

  5. LHC is a Di-lepton Factory “SM (and more) at the LHC” hep-ph/0003275 and CMS-IN-2000/035; M.Dittmar hep-ex/9606002 ED & Compositeness in μ+μ-

  6. Drell-Yan at High Mass ED & Compositeness in μ+μ-

  7. PDF Uncertainties • LHAGLUE v3 integrated in LHAPDF v3 (D.Bourilkov, C.Group, M.Whalley; hep-ph/0305126 ) • Free download from: durpdg.dur.ac.uk/lhapdf/ • PYTHIA, HERWIG or stand-alone mode • Rich in new: CTEQ6, MRST, Fermi, Alekhin, Botje, ZEUS2002, H12000 and legacy: CTEQ4, CTEQ5, MRST98, GRV98 PDF sets; successor of PDFLIB • Typical PDF uncertainties on xsec < 5 % • Included in CMKIN_3_2_0 (DB, Veikko Karimaki, Sergey Slabospitsky) ED & Compositeness in μ+μ-

  8. High-mass Di-lepton Background • To control the DY background we need both N(N)LO and EW radiative corrections • Plan to investigate MC @ NLO • TEV4LHC workshop: no generator today able to do decently both QCD and EW (follow the developments) • Side remark: maybe we need a LEP4LHC workshop to collect the accumulated knowledge about MC tuning, hadronization, CR etc. ! • DY common for many searches in e+e-μ+μ-+- ED & Compositeness in μ+μ-

  9. Estimates for DC04 +-/qq background from 70-120 GeV TO mass 70-120 GeV 20-70 GeV +- 0.8 % 8.1 % qq (no isol) 0.3 % 1.5 % ED & Compositeness in μ+μ-

  10. Expected Results for Physics TDR • Mass and  efficiency plots for signal/bg • Mass resolution for signal/bg • Angular distributions, AFB and spin determination for signal/bg • Discovery reach as function of luminosity for compositeness and ED (ADD, RS) • Systematic effects @ LHC start-up (inclusion and priority after PRS discussions) : most important / difficult part • Detector: alignment, calibration, staging, trigger configuration • Theory: PDF uncertainties, NLO effects, EW corrections • Background from data? Z peak, M < 300-400 GeV ED & Compositeness in μ+μ-

  11. People from Florida • Dimitri Bourilkov, Bockjoo Kim • Muon consultants: Darin Acosta et al. • PDF uncertainties: Dimitri Bourilkov, Craig Group • Theory consultants: Konstantin Matchev, Rick Field ED & Compositeness in μ+μ-

  12. Outlook • High-mass di-leptons are a rich search field for new physics • Many things in common for e+e-μ+μ-+-: • Drell-Yan background (collaborate with SM group, TEV4LHC, LHAPDF) • Simulation/Reconstruction of TeV muons (several searches will use them) • Understanding the most important systematic effects affecting the discovery reach at LHC start-up and how to control them ED & Compositeness in μ+μ-

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