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BEYOND THE STANDARD MODEL with LEP

Strong. WEAK. SM  ???. EM. GUT. {. 1 Family  16 SO(10). BEYOND THE STANDARD MODEL with LEP. G.G.Ross, LEP FEST 2000. Parameters : g, M W,Z , M H , M q i , M l i , Θ i , δ. Structures : SU(3)  SU(2)  U(1) N f = 3 Multiplet Structure. SM  ???. Gravity.

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BEYOND THE STANDARD MODEL with LEP

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  1. Strong WEAK SM??? EM GUT { 1 Family 16SO(10) BEYOND THE STANDARD MODEL with LEP G.G.Ross, LEP FEST 2000 Parameters : g, MW,Z , MH , Mqi , Mli, Θi, δ Structures : SU(3)SU(2)  U(1) Nf = 3 Multiplet Structure

  2. SM??? Gravity BEYOND THE STANDARD MODEL with LEP G.G.Ross, LEP FEST 2000 Parameters: g, MW,Z , MH , Mqi , Mli, Θi, δ Structures : SU(3) SU(2) U(1) Nf = 3 Multiplet Structure Strong WEAK { EM TOE Superstring

  3. SMT.O.E. ? V SU(3)  U(1)EM BEYOND THE STANDARD MODEL with LEP G.G.Ross, LEP FEST 2000 Numerical : g, MW,Z , MH , Mqi , Mli, Θi, δ Structural : SU(3)SU(2)  U(1) Nf=3 Multiplet Structure V/MPlanck10-17… hierarchy problem

  4. q q H H - - H H q q k Composite Higgs (New strong interactions) - -k2/2Composite e H = QTCQTC  2Composite1TeV Technipions, additional Higgs… <H>=V SU(3)  U(1)EM, SU(3) SU(2)  U(1) V/MPlanck 10-17… Hierarchy problem

  5. q H - H q q Supersymmetry H H • New SUSY states : • g , W , Z , γ , q , l , H1, H2 M2HH(m2q-m2q) ~ ~ ~ ~ ~ ~ mq TeV <H>=V SU(3)  U(1)EM, SU(3)SU(2)  U(1) V/MPlanck10-17… Hierarchy problem Composite Higgs

  6. q  H - H q V/M*1, M* TeV 3,2,1 1/r2+n Gravitational coupling Large new dimensions 1/r2 -60 10 E M* - MPlanck mm <H>=V SU(3)  U(1)EM, SU(3)  SU(2)  U(1) V/MPlanck  10-17… Hierarchy problem Composite Higgs Supersymmetry Kaluza Klein tower of gravitons … m  10-3eV, 20keV, 7MeV, 100Mev n = 2, 4, 6, 8 1 Arkani-Hamed, Dimopoulos, Dvali

  7. q  H - H q V/M*1, M* TeV Large new dimensions <H>=V SU(3)  U(1)EM, SU(3)  SU(2)  U(1) V/MPlanck10-17… Hierarchy problem Composite Higgs Supersymmetry Strings at a Tev Kaluza Klein tower of gravitons … m  10-3eV, 20keV, 7MeV, 100Mev n = 2, 4, 6, 8 Antoniadis, Lykken

  8. BSM in the light of LEP Technicolour Additional scalars T,  'T, T, T L3, Delphi .. e+e-+T-T, 0T, WLT, WLWL, f f Limit for ND Technicolour quark doublets - Direct Searches

  9. Spectrum determined by soft SUSY breaking …many possibilities Sleptons ~ ~ ~ ~ e+e-l+l- (l+0)(l- 0) Bulk Gaugino SUGRA 3-2-1 gauge Anomaly For a mass difference M(slepton)-M(LSP) > 15 GeV, the exclusion limits from 189-202 GeV data are: Me < 95GeV ~ M< 95GeV ~ Supersymmetry ADLO mass limits in the MSSM : Hall, Peskin reviews ~ LEPSUSYWG

  10. e+e-+1-1, +101W(*)+ e+e-0201, +101Z(*)0 Charginos, Neutralinos

  11. qqe+Re-Re+e-e+e-GG Light gravitino (GMSB) -

  12. Large new dimensions LEP searches for e+e-GKK M*(TeV) P.Kreiger, SUSY2000

  13. TeV Strings String Reggecontribution may dominate over KK contribution

  14. TeV Strings TeV Strings String model MS=410 GeV KK exchange MH=830 GEV Cullen, Perelstein, Peskin Bhabha scattering L3 (MH>1.2 TeV)

  15. Mhiggs light Indirect searches – precision tests BSM in the light of LEP New families (ZN=2.9840.008), Z', bs, … Technicolour SUSY 

  16. Precision measurements severely constrain possibilities 3S : Weak Isospin conserving 1 T : Weak Isospin violating Decoupling : S, T ~ MZ2/4πM2 , M>>MZ  e.g. SUSY Non-decoupling: Technicolour, 4th generation, q,l composite …difficult ? Swartz, Altarelli,Barbieri, Peskin, Takaheuchi

  17. Krieger SUSY2000 Large new dimensions : KK exchange modifies SM processes M*4 Kreiger, SUSY2000

  18. Amaldi, de Boer, Furstenau See also : Ellis, Kelley, Nanopoulos; Langacker, Luo MSSM Large New Dimensions Unification at a TEV??? Dimopoulos, Raby, Wilczek Ibanez, GGR Dienes, Dudas, Ghergetta, Unification Hints

  19. 3,2,1 1/r2 -60 D.Ghilencea 10 E - MP Unification Hints  Unification at a TEV? I

  20. Technicolour Large Extra Dimensions SUSY Gauge Unification ?   Light Higgs  ?  Indirect : Decoupling  ?  V/M    SU(2)  U(1)U(1)EM  ?  Direct searches ? ? ? LEPilogue

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