Searches for Higgs bosons and New Physics at the Tevatron

Transcription

1 Searches for Higgs bosons and New Physics at the Tevatron Volker Büscher Universität Bonn DESY Seminar, March 8/9, 008 Indirect constraints from precision measurements The SM Higgs boson MSSM Higgs bosons Supersymmetry: Squarks, Gluinos, Charginos Heavy Resonances Full set of Tevatron results available at:

2 The Tevatron Collider Proton Antiproton Collider Centre-of-mass energy:.96 TeV Integrated Luminosity: 3.8 fb so far Peak luminosity:.8 3 cm s Expecting to accumulate 6-9 fb by 009/ p ABORT MAIN INJECTOR (MI) _ p p (50 GeV) & RECYCLER (8 GeV) _ p SOURCE: DEBUNCHER (8 GeV) & ACCUMULATOR (8 GeV) 8 GeV INJ P8 A P P P3 F0 0 GeV p RF 50 GeV _ INJ 50 GeV p INJ LINAC (400 MeV) PRE-ACC BOOSTER (8 GeV) A0 TeV EXTRACTION COLLIDER ABORTS S TEVATRON EXTRACTION for FIXED TARGET EXPERIMENTS CDF DETECTOR & LOW BETA W E SWITCHYARD B0 N TEVATRON E0 p ( TeV) _ p ( TeV) C0 DO DETECTOR & LOW BETA _ p ABORT D0 Electron Cooling in operation

3 The Tevatron Collider Proton Antiproton Collider Centre-of-mass energy:.96 TeV Integrated Luminosity: 3.8 fb so far Peak luminosity:.8 3 cm s Expecting to accumulate 6-9 fb by 009/ p ABORT MAIN INJECTOR (MI) _ p p (50 GeV) & RECYCLER (8 GeV) TEVATRON _ p SOURCE: DEBUNCHER (8 GeV) & ACCUMULATOR (8 GeV) 8 GeV INJ P8 A P P P3 F0 0 GeV p RF 50 GeV _ INJ 50 GeV p INJ E0 LINAC (400 MeV) PRE-ACC BOOSTER (8 GeV) A0 TeV EXTRACTION COLLIDER ABORTS p ( TeV) _ p ( TeV) S TEVATRON EXTRACTION for FIXED TARGET EXPERIMENTS CDF DETECTOR & LOW BETA C0 W E SWITCHYARD B0 N DO DETECTOR & LOW BETA _ p ABORT D0 Electron Cooling in operation

4 Physics at Hadron Colliders Tevatron: Proton-Antiproton Collider at s=.96 TeV, collisions every 396 ns Advantage: High centre-of-mass energy production of massive particles (LEP: m < 0 GeV) Disadvantage: Strong Interaction huge event rates for jet production multiple interactions per crossing complicated final states: particles from fragmentation of p/ p remnants gluon radiation jets Spectators/ULE p p f (x ) i f (x ) j p x p x σ^ ij (x x ) Hadronisation incoming hadrons hard interaction parton shower

5 The Tevatron Experiments µ PDTs µ Scintillation Counters Two General-Purpose Detectors: CDF DØ Electron acceptance η <.0 η < 3.0 Muon acceptance η <.5 η <.0 Silicon Precision tracking η <.0 η < 3.0 Hermetic Calorimeter η < 3.6 η < 4. Powerful trigger systems (.5 MHz 0 Hz) Dilepton triggers starting at p T > 4 GeV Jets+ E T triggers with E T > 5 GeV µ MDTs Calorimeter Tracking Superconducting Detectors Coil Toroid CFT Shielding CPS FPS Si Barrels F Disks H Disks

6 The Tevatron Experiments Dataset fb recorded by DØ + CDF Most results presented here based on fb

7 Pinning down EWSB at the Tevatron Standard Model relates m H, m t, m W via radiative corrections: m W [GeV] March % CL H W/Z W/Z LEP and Tevatron (prel.) LEP and SLD 80.3 α m H [GeV] m t [GeV] Indirect constraints on Higgs boson mass: t W W m top b H March 008 W/Z W/Z ln m H m W χ m H = GeV and m H < 60 GeV at 95% C.L Theory uncertainty α had = α (5) ± ±0.000 incl. low Q data Excluded Preliminary m H [GeV] m Limit = 60 GeV

8 Pinning down EWSB at the Tevatron Combined top mass measurement from CDF+DØ: m t = 7.6±0.8(stat)±.(syst) GeV New CDF W mass measurement (00 pb ): m W = 80.43±0.048 GeV new world average: m W = ±0.05 GeV m W [GeV] LEP and SLD LEP and Tevatron (prel.) 68% CL ? Projected uncertainties for 8 fb : m t : ±. GeV m W : ±5-0 MeV 80.3 α m H [GeV] m t [GeV]

9 Search for Higgs Bosons Production and Decay Production Cross-Sections Branching Ratios bb WW ZZ gg > H τ + τ Hqq bbh WH ZH BR(H) cc gg tt Light Higgs bosons (m H < 35 GeV): q V q H V Heavy Higgs bosons (m H > 35 GeV): g g t t t H tth 3 Dominant decay mode: H b b Production: in association with W,Z γγ Zγ M H [GeV] leptonic W,Z-decays provide best signature b-tagging to suppress background from W/Z+jets Dominant decay mode: H WW Production: Gluon-Gluon Fusion relatively high cross-section clean -lepton+ E T signature via H WW lνlν

10 Search for low-mass Higgs Boson For best sensitivity, need to combine many channels: WH lνb b, ZH ν νb b, ZH l + l b b (with l=e,µ) Challenge: very low signal rates, massive backgrounds from V+jets First step: select events consistent with W/Z+ jets Events L =.7 fb DØ Preliminary W + jets Data W + jets 000 QCD SM bkgd W Transverse Mass (GeV)

11 Search for low-mass Higgs Boson Second step: b-tagging Exploiting B-meson lifetime, mass and decay modes to separate b- from light-quark jets: impact parameter secondary vertices vertex mass vertex track multiplicity soft leptons Similar strategies in both experiments: use neural networks for optimal combination of tagging information use several NN operating points to define channels with high/low s/b: tight b-tag (low s/b, single tag ), loose b-tags (high s/b, double tag )

12 Search for low-mass Higgs Boson Backgrounds dominated by W/Z+bb, t t Main handle: invariant mass of two b-jets Events 3 - L =.7 fb DØ Preliminary W + jets / b-tag Data W + jets QCD tt Wbb other WH 5 GeV (x) Events 3 - L =.7 fb DØ Preliminary W + jets / b-tags Data W + jets QCD tt Wbb other WH 5 GeV (x) Dijet Mass (GeV) Dijet Mass (GeV)

13 Search for low-mass Higgs Boson For optimal separation power, use neural networks: Events 3 - L =.7 fb DØ Preliminary W + jets / b-tags Data W + jets QCD tt Wbb other WH 5 GeV (x) Number of events CDF Run II Preliminary (.9 fb ) 8 Data W+HF Mistag tt (6.7pb),Single top Diboson NonW Higgs (0 GeV) Background error NN output - tags NNop6Higgs0 Note: signal-to-background ratios are at most -0% need full combination of all channels to reach sensitivity need to control systematics at a level %! Main concern: modeling of V+jets backgrounds shapes: from MC (alpgen, MCFM, CKKW) normalisation: combination of (N)NLO cross-sections and sideband-fitting

14 New channels added for Winter 008 DØ: H γγ γ CDF: H+jj with H ττ q q H t t t γ W/Z W/Z q q H - DØ,.7 fb preliminary τ τ + lep had jet CDF Run II Preliminary Events/5 GeV 3 data QCD γγ γj jj Z/γ*->ee signal(m=30gev) N of Events SM Higgs: WH+ZH+VBF+ggH - Data (L =.0 fb ) Total Background Z ττ+jets SM Higgs(0) M γ γ (GeV) Expected Limit: 40 x σ SM (m H =0 GeV) Full ττ Mass [GeV/c Expected Limit: 5 x σ SM (m H =0 GeV) ]

15 Search for high-mass Higgs Boson: H WW Main irreducible background: WW lνlν Additional information: angular correlations exploiting spin of Higgs boson Charged leptons from Higgs decay tend to have small opening angle Φ Events / CDF Run II Preliminary m H (60) data WW WZ ZZ - L dt =. fb tt Wγ W+jets DY R leptons For best sensitivity, use multivariate techniques

16 Search for high-mass Higgs Boson: H WW For each event, use full kinematic information x obs to calculate probabilities that event comes from signal (P H ) and background (P B ): P H/B (x obs ) = dy n true σ σtheory H/B (y true) ǫ(y true ) G(x obs, y true ) H/B Then calculate likelihood ratio P H P H +P B for optimal separation of signal and background: Events / m H (60) data WW WZ ZZ tt Wγ W+jets DY 0 80 CDF Run II Preliminary Events / L dt =.9 fb LR (H WW, high S/B) LR (H WW, high S/B)

17 Search for high-mass Higgs Boson: H WW For each event, use full kinematic information x obs to calculate probabilities that event comes from signal (P H ) and background (P B ): P H/B (x obs ) = dy n true σ σtheory H/B (y true) ǫ(y true ) G(x obs, y true ) H/B Then calculate likelihood ratio P H P H +P B for optimal separation of signal and background Finally, combine with other kinematic variables in a neural network: CDF Run II Preliminary HWW ME+NN M H = 60 [GeV/c ] - L =.4 fb High S/B HWW Wj Wγ tt WZ ZZ DY WW Data events DØ Run IIb Preliminary e mu L=./fb data H 60 WW Z + jets Diboson W + jets/γ - - QCD - ttbarincl NN Output NN

18 Tevatron Full Combination Massive exercise in advanced statistics currently combining 8 different channels full distributions of final variables are analyzed 8 NN/LR/Mass distributions Events / CDF Run II Preliminary L dt =.9 fb m H (60) 40 data tt WW Wγ Events / WZ ZZ W+jets DY LR (H WW, high S/B) Events 3 - L =.7 fb DØ Preliminary W + jets / b-tags Data W + jets QCD tt Wbb other WH 5 GeV (x) Number of events CDF Run II Preliminary (.7 fb ) Data W+HF Mistag tt (6.7pb),Single top Diboson NonW Higgs (0 GeV) Background error Number of Events / DØ Preliminary Data QCD Z+jets Z+bb(cc) tt WZ ZZ ZH 5 Number of Events CDF II Preliminary Ldt = fb Data - Double Tag Standard Model Backgrounds ZH llbb X (M H = 0 GeV/c ) LR (H WW, high S/B) NN output - tags NNopHiggs Neural Network output NN Projected Slice (Z+jets vs ZH) > 50 different sources of systematic uncertainties are considered taking into account correlations bin-to-bin and channel-to-channel >50 300x300 covariance matrices... Systematic uncertainties need to be constrained in sidebands very complicated procedure... used several techniques (Bayesian, mod. frequentist) and 4 independent programs to cross-check calculations results agree within %

19 Tevatron Full Combination 95% CL Limit/SM LEP Limit Tevatron Run II Preliminary, L=.0-.4 fb - Tevatron Expected Tevatron Observed ±σ CDF Exp ±σ D Exp SM March, m H (GeV/c ) Sensitivity improvement still scaling faster than luminosity Exciting times are ahead!

20 Tevatron Full Combination Sensitivity improvement still scaling faster than luminosity Exciting times are ahead!

21 Beyond the Standard Model Strong hint for new physics: The hierarchy problem fermion loop corrections to Higgs mass are divergent Higgs mass should be of the order of the cutoff scale Λ (e.g. M Planck ) f H H MH = N λ [ f f 8π Λ + 6m f log Λ m m f f] + O(/Λ ) f in contradiction to indirect evidence for a light SM Higgs boson there must be something beyond the SM that modifies these corrections Two main options:. New physics at O( TeV) loop corrections stay reasonably small. New symmetry that suppresses loop corrections Most straightforward way: cancel fermion loops with boson loops f H H + f Cancellation exact for equal couplings and mass Ås H H =0

22 Supersymmetry The idea: particle physics is symmetric under transformation fermion boson implies one supersymmetric partner for each SM particle Superpartners are heavy SUSY must be broken Details of SUSY breaking mechanism unknown need to consider several models: gravity-, gauge-, anomaly-mediated breaking Predictions: Many new SUSY particles: Charginos/Neutralinos/Gluinos, Squarks, Sleptons Extended Higgs sector: 5 physical Higgs bosons h,h,a,h ± Mass (ev) h Z W τ µ t b c s d Mass (ev) ± H H,A h χ ± χ ± g ~, χ 0 χ 0 3 4, χ 0 χ 0 ~ l L ~ l R τ τ q ~, q ~ L R ~ t b ~ b ~ ~ t ν L 6 u e Particle Spectrum Particle Spectrum

23 M W vs. m t for SM vs. MSSM experimental errors 68% CL: LEP/Tevatron (today) light SUSY M W [GeV] M H = 4 GeV SM M H = 400 GeV SM MSSM both models MSSM heavy SUSY Heinemeyer, Hollik, Stockinger, Weber, Weiglein m t [GeV] Supersymmetric theories predict additional particles that modify loop corrections Lightest MSSM Higgs boson: m h < 35 GeV

24 Blue Band Plot for SM vs. MSSM 4 O. Buchmueller et al., arxiv: LEP excluded Adding constraints from CDM, b sγ etc. allows prediction of m h in MSSM: m h = + 8 (exp) ±3 (theo) GeV

25 Search for SUSY Higgs g b Important: Higgs-b b-coupling depends on tanβ Φ large cross-sections for Higgs production at high tanβ «g g Additional search channels at high tanβ: associated production with bb: bbφ with Φ bb,ττ b b Φ b τ enhanced gluon fusion cross-section: gg Φ ττ b g τ 3 σ [fb] SM Higgs production cross sections gg h qq Wh qq qqh bb h gg,qq tth TeV4LHC Higgs working group TeV II qq Zh m h [GeV] Φ production cross section [fb] MSSM Higgs Production cross sections Tevatron, s =.96 TeV m h max, tanβ = 40 W/ZΦ qqφ ggφ ttφ M Φ [GeV] h H A (bb)φ

26 Search for SUSY Higgs: Φ ττ Selections: A) two isolated taus with one leptonic tau decay B) isolated electron and muon Irreducible background from Z τ + τ Reconstruction of effective mass from visible tau decay products and E T Summer 006 Events / GeV 3 - DØ 35 pb τ e/µ τ had Selection Data Φ ττ (50 GeV) Z τ τ QCD W, Z ee, µµ Di-boson Events / GeV DØ 35 pb τ e τ µ Selection - Data Φ ττ (50 GeV) Z τ τ QCD W, Z ee, µµ Di-boson M vis [GeV] M vis [GeV]

27 Search for SUSY Higgs: Φ ττ January 007: new CDF results with fb m vis (GeV) - σ(pp φx) x BR(φ ττ) (pb) 0 0. Expected σ band σ band 95% CL upper limits CDF Run II fb - MSSM Higgs ττ Search Preliminary Observed mφ (GeV) σ excess at m A 50 GeV would correspond to tanβ 50 confirmed by DØ?

28 Search for SUSY Higgs: Φ ττ February 007: new DØ results with fb * Br(φ ττ) (pb) 95% limit σ D - Preliminary,.0 fb Observed Limit Expected Limit Expected Limit, ±σ (a) Higgs Mass (GeV) unfortunately no confirmation of signal

29 Search for SUSY Higgs: Φ ττ October 007: new CDF results with.8 fb 00 τ e τ had + τ µ τ had channels m φ (GeV/c ) 00 0 CDF Run II.8 fb - MSSM φ ττ Search Preliminary m A = 40 GeV - ττ) (pb) BR(φ +X) σ(p p φ MSSM Higgs 0 0. ττsearch, 95% CL Upper Limit CDF Run II Preliminary,.8 fb - Observed Expected σ band σ band m A (GeV/c ) Excess is gone m φ (GeV/c )

30 Search for SUSY Higgs: Φ ττ Interpretation within MSSM: limits on tanβ as a function of m A based on DØ fb µτ h, CDF.8 fb µτ h, eτ h, eµ limits from bbh channels currently not competitive no Tevatron combination yet benchmark scenarios: no-mixing and mhmax tanβ µ<0 no mixing LEP m h max DØ m A (GeV/c ) no mixing CDF Tevatron Preliminary MSSM Higgs ττ 95% CL Exclusion DØ (.0 fb - ) CDF (.8 fb - ) Expect to reach sensitivity to tanβ 0 with full Run II dataset In addition: expect to probe large m A with WH/ZH channels

31 Search for Supersymmetry Squarks/Gluinos q q q g g g g q q Æg q g q q q Squarks/Gluinos produced via strong interaction large cross sections at hadron colliders q q qq + E T Decays: jets + LSP LSP assumed to be stable (R p conserved) Signature: jets + E T Data collected with dedicated triggers: acoplanar jets + E T LSP LSP MET Mass region Main Channel Signature m q < m g q q j + E T m q > m g g g 4j + E T m q m g q q, q g 3j + E T Dijet Background MET 3-jet Background

32 Search for Supersymmetry Squarks/Gluinos j+ E T analysis 3j+ E T analysis Events / 0 GeV (a) - DØ, L=. fb Data SM Background Fitted QCD SUSY Events / 0 GeV 3 (b) - DØ, L=. fb Data SM Background Fitted QCD SUSY Main backgrounds: E T (GeV) q ν Main selection cuts: E T (GeV) Multijets with fake E T W+jets with W eν, µν, τν Z+jets with Z ν ν q Z ν /3/4 jets and large E T angular separation E T, jets isolated lepton veto Mass region Main Channel Signature E T H T = p jet T Exp. Bckgd. Data m q < m g q q j + E T >5 GeV >35 GeV ±3 m q > m g g g 4j + E T >0 GeV >400 GeV 8±5 0 m q m g q q, q g 3j + E T >75 GeV >375 GeV ±3 9

33 Search for Supersymmetry Squarks/Gluinos ( E T =368 GeV, p j T q q candidate event =8 GeV, pj T =74 GeV) Gluino Squark Mass (GeV) No evidence for squark/gluino production at the Tevatron UA UA DØ IA CDF IB DØ II DØ IB Mass (GeV) - DØ, L=. fb tanβ=3, A =0, µ <0 0 New limits in squark/gluino mass plane (msugra: tanβ=3, A 0 = 0, µ < 0) Sensitivity beyond indirect limits from LEP LEP LEP ± χ LEP ~ ± l no msugra solution

34 What other particles does SUSY predict? Mass (ev) ± H H,A χ ± g ~, χ 0 χ q ~, q ~ L R ~ t b ~ b ~ ~ t χ ±, χ 0 ~ l L τ ν L h χ 0 ~ l R τ Particle Spectrum

35 Search for Charginos and Neutralinos Production cross section (electroweak) relatively small need clean leptonic signature to suppress backgrounds q χ 0 l ± Golden channel: χ ± χ 0 3l + E T Experimental Challenge: low-p T leptons need multilepton triggers with low thresholds need efficient lepton identification at low p T W q χ ± χ 0 W Z ν l + l χ rd lepton M(slepton) = 6 GeV M(neutralino) = GeV M(chargino) = 6 GeV next-to-leading lepton leading lepton PT lepton (generator level) (GeV)

36 Search for Charginos and Neutralinos Analysis Strategy: two identified leptons plus isolated track isolation criteria designed to be efficient for electrons, muons and hadronic τ-decays Transverse momentum thresholds (DØ): p l T p l3 T Selection p l T eel > GeV >8 GeV >4 GeV eµl > GeV >8 GeV >5 GeV µµl > GeV >8 GeV >4 GeV ls-µµ > GeV >5 GeV Hollow Isolation Cone Events / GeV DØ, 30 pb eel selection Data * Z/γ QCD W + jet / γ WW,WZ,ZZ tt SUSY l3 (GeV) p T Electron Muon Tau Jet

37 Search for Charginos and Neutralinos DØ Results (0.9.7 fb ): CDF Results ( fb ): Selection Expected Background Observed Signal (m χ ±= GeV) eel.8± ±0.4 eµl 0.9± ±0. µµl 0.3±0.8.5±0. ls-µµ.±0.4 4.±0.7 Combined 4.± ±0.8 (t=tight,l=loose) 3t t,l t,l t+trk t,l+trk Expected Background 0.5±0. 0.5± ± ±0.7.3±0.6 Observed Signal (m χ ±=0 GeV).3±0.3.6±0. 0.7±0. 4.4±0.7.4±0.4 No evidence for chargino/neutralino production Limits on product of cross section and leptonic branching fraction

38 Search for Charginos and Neutralinos ) BR(3l) (pb) 0 χ ± σ(χ LEP 0. heavy-squarks 3l-max - DØ Run II Preliminary, fb ~ M(χ ± ) M(χ 0 ) M(χ 0 ); M( l)>m(χ 0 ) tanβ=3, µ>0, no slepton mixing Observed Limit Expected Limit 0. large-m Chargino Mass (GeV) Limits constrain SUSY beyond LEP chargino limits: 3l-max scenario: m χ ± > 45 GeV Updates with 3 fb datasets currently in progress

39 Search for Charginos and Neutralinos ) BR(3l) (pb) χ 0 σ(χ ± - LEP 3l-max large-m fb Search for -.0 fb ± 0 χ χ 0 3l+X ± ~ l)>m(χ 0 ) M(χ 0 M( χ ) M( χ ); M( tanβ=3, µ>0, no slepton mixing fb ) fb Chargino Mass (GeV) Run II projections (combining CDF and DØ): 3l-max scenario: will probe m χ ± > 00 GeV large-m 0 scenario: sensitive up to m χ ± 50 GeV Updates with 3 fb datasets currently in progress

40 Beyond msugra Many other SUSY models on the market large variety of SUSY searches at the Tevatron Gauge-Mediated SUSY Breaking Inclusive γγ + E T : charginos excluded up to 9 GeV (DØ) σ (fb) - D. fb NLO cross-section observed limit expected limit expected limit ± σ expected limit ± σ Long-lived neutralinos: limits up to GeV (CDF) Anomaly-Mediated SUSY Breaking Stable charginos: excluded up to 74 GeV (DØ) [GeV] m χ m χ + [GeV] Λ (TeV) Split Supersymmetry Long-lived Gluinos g g χ 0 : limits up to 30 GeV for lifetimes up to 0 hours (DØ) R-Parity Violation LLE couplings: limits on charginos up to 34 GeV (DØ)

41 Beyond msugra Many other SUSY models on the market large variety of SUSY searches at the Tevatron Gauge-Mediated SUSY Breaking Inclusive γγ + E T : charginos excluded up to 9 GeV (DØ) Long-lived neutralinos: limits up to GeV (CDF) Anomaly-Mediated SUSY Breaking Stable charginos: excluded up to 74 GeV (DØ) Split Supersymmetry Long-lived Gluinos g g χ 0 : limits up to 30 GeV for lifetimes up to 0 hours (DØ) M χ ± [GeV] 60 0 DØ, 360 pb - R-Parity Violation LLE couplings: limits on charginos up to 34 GeV (DØ) Exclusion domains LEP excluded obs. λ obs. λ obs. λ 33 χ ± is LSP exp. λ exp. λ exp. λ M χ [GeV]

42 Beyond Supersymmetry Heavy Resonances Searches for heavy charged or neutral difermion resonance X: Channels considered for X 0 f f: ee, µµ, ττ, q q, t t (plus eµ, γγ) Channels considered for X ± ff : eν, q q, tb Events / 6 GeV DØ, fb data W e ν QCD (from data) other m W m W (a) = 500 GeV = 0 GeV ( 00) CDF Run II Preliminary ) Events/( GeV/c ) Events/( GeV/c L =.5 fb data Drell-Yan 40 - QCD Other SM M(ee) (GeV/c ) m T [GeV] DØ: M W >.0 TeV CDF: M Z >966 GeV M(ee) (GeV/c )

43 Beyond Supersymmetry Heavy Resonances Searches for Leptoquarks LQ lq: Final states considered: eeqq, eνqq, µµqq, µνqq, ννqq, ττbb, ννbb High LQ mass decay products with high transverse momenta check for excess at high S T =p T + p T + p3 T + p4 T st Generation (eeqq) 3rd Generation (ττbb) data Number of events/5 GeV - DØ 5pb Data Total Background LQ (40 GeV/c ) Entries Single- & Double-tags D0 preliminary - L=.05 fb QCD tt wbb lν bb wcc lν cc w+ljets lν ljets zbb ll bb zcc ll cc z+ljets ll ljets wz+zz incl. Signal(0 GeV)* Signal(80 GeV)* S T (GeV) (GeV) S T Mass limits for BR(LQ lq)=: st Generation: M>56 GeV nd Generation: M>5 GeV 3rd Generation: M>80 GeV

44 Conclusions Tevatron is running very well: 3 fb on tape, good prospects for 8 fb by 0 Precision measurements of Top and W mass pinpoint SM Higgs boson mass SM Higgs search finally reaching sensitivity SUSY Higgs: limits on tanβ at low m A (consistent with B s µµ) Direct searches for Supersymmetry: Squarks, Gluinos: excluded below about 380 GeV, 3 GeV Charginos: excluded below 45 GeV (in favourable scenarios) numerous signatures and models beyond msugra have been investigated Searches for heavy resonances probing masses up to TeV

45 Conclusions M / (GeV) 400 L dt = fb - tan(β) =, µ > 0, A 0 = 0 00 g(500) 00 g(000) l E T miss q(500) 800 l OS 0l 600 g(500) 3l l SS q(000) Still plenty of room for SUSY discovery at LHC! q(500) 400 Tevatron Reach g(00) q(00) 00 g(500) q(500) M 0 (GeV)

46 BACKUP