Highlights from Higgs Physics at CMS

Transcription

1 ighlights from iggs Physics at Chayanit Asawatangtrakuldee (DESY) on behalf of the Collaboration DPG8 9-3 March 8, Würzburg (Germany)

2 Introduction The Standard model (SM) of particle physics explains a wide variety of microscopic phenomena in a unified framework (Quantum Field Theory) matters consist of quarks and leptons interaction between particles governed by gauge bosons The iggs mechanism is responsible for assigning mass to particles iggs boson is an evidence of the iggs field A main goal of the LC is the in-depth investigation of electroweak symmetry breaking symmetry breaking A SM-like iggs boson = (5) was discovered by ATLAS and experiments of the LC in

3 Introduction 6 years after the discovery, the story continues precise measurements of properties mass, couplings/cross-section discover other iggs decay channels and production modes ττ, bb, tt production rare processes : μμ, invisible search for iggs bosons beyond the SM This talk will focus on the latest results available with the full 6 data (L ~ 36 fb ) properties of (5) BSM iggs searches Events / 3 GeV 35 Data 3 m = 6 GeV Zγ*, ZZ Z+X PRD 89 (4) 97 s = 7 TeV, L = 5. fb ; s = 8 TeV, L = 9.7 fb 6 m 4l 8 (GeV) 3

4 Compact Muon Solenoid () One of two large general purpose detectors of the LC Smaller in dimension than ATLAS, but heavier : 5m diameter, m length, 5 tons ATLAS : m diameter, 46m length, 7 tons,ntegrated LumLnosLty, SS 5 years of data taking and being analyzed at 7 TeV, L ~ 5 fb at 8 TeV, L ~ fb 5 at 3 TeV, L ~ 3 fb 6 at 3 TeV, L ~ 36 fb 7 at 3 TeV, L ~ 4 fb Run > fb Run 7otDO,nteJUDted LumLnoVLty (fb ) ASU DDtD included fuom -3-3 : to 7-4:9 U7C, 7 7e9, 45. pb, 7 7e9, 6. fb, 8 7e9, 3.3 fb 5, 3 7e9, 4. fb 6, 3 7e9, 4.8 fb 7, 3 7e9, 5. fb Dy Jun JuO AuJ 6eS DDte (87C) ct ov 5 Dec

5 iggs Production at LC Run Run g gluon fusion (gg) 48.3 pb g q q W/Z fusion (VBF) 3.77 pb q q q W.36 pb Z.88 pb q W, Z g t, b tt.5 pb g t, b q t tq.74 pb q b 5

6 iggs Decay Most of the (5) decays accessible at the LC Branching ratios bb WW ττ LC IGGS XS WG 3 Bosonic decay : ZZ (3%), γγ (.%) as the discovery channels with clean final states, including WW (%) for precise measurements - ZZ -3-4 γγ Zγ μμ M [GeV] 5 main production processes x 6 decay modes =3 exclusive final states contributed to (5) Fermionic decay : bb (58%) dominant channel, ττ (6%) and μμ (.%) as rare decay not discovered yet in Run ighlights of Run! 6

7 -- ZZ & γγ JEP (7) 47 PAS IG6-4 PAS IG75 Measurement of mass of (5) decaying to 4 leptons and diphoton channels sensitivity enhanced by event categorizations Events / GeV Data (5) 35.9 fb (3 TeV) qq ZZ, Zγ* gg ZZ, Zγ* Z+X (GeV) m 4l S/(S+B) Weighted Events / GeV γγ Preliminary m =5.4 GeV, = fb (3 All categories S/(S+B) weighted Data S+B fit B component ± σ ± σ TeV) 6 B component subtracted m γγ (GeV) mass ( ZZ) : m = 5.6 ±. stat. ±.8 syst. GeV % more precise compared to Run ATLAS+ combination 7

8 ττ PLB 779 (8) 83 Second largest branching ratio (~6.3%) among fermionic decay channel lower background compare to bb 4 most sensitive channels (eμ, eτh, μτh, τhτh) x 3 event categories (-,-,-jets) Events/bin (Obs. - bkg.) Bkg. unc. 5 targeting gg and VBF processes Clear excess at m =5 GeV First observation of ττ from single experiment < m < 3 GeV 3 < m < 5 GeV 5 < m < 8 GeV > 8 GeV jj jj, VBF τ h τ h jj m jj 35.9 fb (3 TeV) Observed ττ ( =.9) Z ττ Z /ee tt+jets W+jets QCD multijet Others Total unc. ττ ( =.9) Obs. - bkg. Bkg. unc. ττ Bkg. unc. Bkg. unc. 4.9σ (4.7σ expected) 5.9σ combined with Run Signal strength μ (the ratio of the measured iggs boson rate to its SM prediction) is compatible with SM μ =.98 ±.8 (Run+Run) m ττ (GeV) 8

9 V bb arxiv: Dominant decay mode (~58%) in SM, but not yet discovered due to large background recoiling against W/Z boson is advantageous 3 channels (-, -, - leptons) from W/Z ll,lν,νν Multivariate regression to improve mass resolution Signal extraction using multivariate analysis technique Events /.5 GeV Simulation (3 TeV) M = 5 GeV Before regression RMS/peak = 5.6% After regression RMS/peak = 3.% Z(bb) =.9 ±.5 W(bb) =.7 ±.7 pp V; bb Combined =. ± fb (3 TeV) [GeV] Evidence of bb which can lead to the discovery! M bb lept. =. ±.5 lept. =.9 ±.6 lept. =.8 ±.6 Data used Significance Significance Signal strength expected observed observed Run Run Combined Best fit 9

10 Boosted bb PRL (8) 78 Studying bb in inclusive production (without W/Z boson) was usually considered impossible due to overwhelming QCD background New idea introduced in boosted topology boosted bb candidate recoiling against ISR jet dedicated jet substructure techniques to tag large-radius jets containing two b quarks Events / 7 GeV < p < GeV T double-b tagger passing region 35.9 fb (3 TeV) W Z tt Multijet Total background (bb) Data A respectable sensitivity for bb in a brand new regime of gg with p T > 45 GeV using promising method Clear observation of resonant Z bb signal 3 significance 5.σ (5.8σ expected) Data multijet tt σ Data 5 W Z (GeV) m SD no p T corr. Z Observed signal strength Expected UL signal strength < 3.3 < 4. Observed UL signal strength < 5.8 < 7. Expected significance.7s.5s 5.8s Observed significance.5s.6s 5.s

11 tt bb (leptonic) PAS IG7-6 Direct probe of the top-iggs Yukawa couplings cross section increased by a factor of 3.9 in Run g t W + b e +, + v e, v gain from largest BR( bb) At least one lepton from top decay higher purity g t W b b q' q Complex final states require more sophisticated methods 3 different multivariate analysis techniques semileptonic tt diagram b 35.9 fb (3 TeV) Limited by tt+f and b-tagging uncertainties Preliminary tot stat syst Dilepton Best-fit μ =.7 ±.45 significance.6σ (.σ expected) Single-lepton huge improvement in sensitivity than Run Combined Best fit = σ/σ SM at m = 5 GeV

12 tt bb (hadronic) PAS IG7- adronic top decay higher rate (46%) but more challenging 7 jets in an event requires dedicated all-jet triggers fully reconstructed final state to the iggs candidate Enhanced quark-jet final states by quark-gluon jet discriminant reduce QCD multijet background g g t t W + W b q q b b q fully hadronic tt diagram q b Two levels of multivariate methods to separate signal and background Provided supplementary sensitivity to the overall search for tt production Best-fit μ =.9 ±.5, upper observed limit μ < 3.8 at 95% CL 7j, 3b j, 3b j, 3b 3.5 7j, 4b j, 4b. 9j, 4b.4 3b cats.7 4b cats Combined fb (3 TeV) tot ( stat syst ) ( ) ( ) ( ) +.3. ( ) ( ) ( ) ( ) ( ) ( ) Best fit = σ/σ SM at m = 5 GeV

13 tt Summary PAS IG6-4 PAS IG78 PAS IG7- PAS IG7-6 A variety of final states, studied with different experimental techniques: tt + b-jets: large branching ratio, but complex multijet final state tt + leptons ( WW, ZZ, ττ): lower rate, low SM backgrounds tt + γγ, 4l: small branching ratio, but very clean final state decay mode best fit μ significance γγ. (+.9/-.8) 3.3σ (.6σ exp.) WW, ZZ, ττ.3 (+.45/-.43) 3.σ (.8σ exp.) bb, l.9 (+.5/.5).6σ (.7σ exp.) bb, l + l.7 (+.45/-.45).6σ (.σ exp.) The tt combination is not yet available but all above channels enter the combination of couplings measurement (slide 56) 3

14 Rare μμ Modified Breit Wigner (mbw):b(x) = Probe of (5) couplings to nd generation of leptons (x z ) a +( s z In some categories, very low BR a(~.%) variation on the modified Breit Wigner distribution (Eq. 4) is used, m tiplying itbeneficial by a Bernstein from excellent polynomial dimuon ofmass up toresolution degree 4. Due to No differences significant inexcess muonis mass observed resolution and background composition, we select the ba ground functional 95% CL upper formlimit separately on the signal for each strength category. Figure 3 shows the dimuon mass sp trum for the two most sensitive categories, category 4 (right) and (left). The choice of background Run+Run function: is best-fit basedμ on= minimizing.9 ±. significance the possible of.98σ bias in (.9σ the fitted expected) signal yields. Events /.5 GeV S/(S+B) Weighted Events /.5 GeV Preliminary m^ =5. GeV, =.7 5 =.7 for m=5 GeV All categories S/(S+B) weighted Data S+B fit B component ± σ ± σ B component subtracted 35.9 fb 35.9 fb (3 (3 TeV) [GeV] Preliminary =.7 for m =5 GeV cat B component subtracted Breit Wigner:B(x) = Data S+B fit B component ± σ ± σ m TeV) % CL Limit on σ/σ SM Events /.5 GeV i= 6 Preliminary Supplementary =.7 for m =5 GeV e ax s z PAS IG79 (x z ) +( s z e a x+a 3 x Preliminary 5. fb ) ) a (7 TeV) fb (8 TeV) fb Observed [GeV] m (3 TeV) Expected background only ± Expected σ (SM m =5 GeV) ± σ cat 4 Expected ± σ (SM m = 5 GeV) μ <.64 obs. (.89 exp.) 4 B component subtracted 35.9 fb (3 TeV Data S+B fit B component ± σ ± σ

15 (5) Combination PAS IG7-3 Cover a wide range of (5) measurements using the full 6 data combined analysis sensitive to out of 5 possible production x decay channels Signal strengths for the production and decay are compatible with SM expectations gg Preliminary 35.9 fb (3 TeV) Observed ±σ (stat. sys.) ±σ (sys.) ±σ ~33% more precise than Run ATLAS+ comb. γ γ Preliminary 35.9 fb (3 TeV) Observed ±σ (stat. sys.) ±σ (sys.) ±σ VBF W improves up to % for VBF and V ZZ ~3% more precise than Run ATLAS+ comb. Z WW tt ~5% reduced uncertainty than Run ATLAS+ comb. ττ bb already reach the same level as Run ATLAS+ comb Parameter value Parameter value 5

16 Couplings of (5) PAS IG7-3 In κ-framework, κ represents the deviations from SM predictions of the iggs boson couplings to SM bosons and fermions By allowing BR( BSM) to vary in the fit, indirect constraints on iggs couplings to invisible and undetected particles can be obtained (5) still looks SM-like up to now κ Z κ W κ t κ τ κ b κ g κ γ B inv B undet. Preliminary 35.9 fb (3 TeV) Observed σ interval σ interval BR inv 95% CL BR undet. 95% CL Parameter value v V m κ V or v F m κ F Ratio to SM Preliminary.5 τ b 35.9 fb (3 TeV) W Z SM iggs boson [M, ε] fit ± σ ± σ Particle mass [GeV] t 6

17 invisible PAS IG7-3 Direct searches performed in channels where (5) recoils against visible system monojet (gg), -jets (VBF and V), -leptons (Z) The SM expectation ( ZZ 4ν) is essentially zero a sign of new physics No significant deviations from the SM expectations are observed 95% CL upper limits on σxbr relative to SM production is estimated Interpretation in the context of iggs-dark matter model (backup) 35.9 fb (3 TeV) g g t t t t g q q W/Z BR( invisible) <.4 (.8) obs (exp) for m = 5 GeV at 95% CL W/Z q q W ±,Z W,Z q q SM 95% CL upper limit on σ x B( inv.)/σ Preliminary Observed Median expected 68% expected 95% expected Combined VBF-tag Z(ll)-tag V(qq')-tag gg-tag 7

18 Extended iggs Sectors PAS IG7- Search for additional neutral iggs bosons in the ditau final state focus on Minimal Supersymmetric Standard Model (MSSM) 4 most sensitive channels : eμ, eτh, μτh, τhτh (τh = hadronic tau) categories for two production modes No excess is observed g gluon fusion t, t h,, A b, b g g g b h,, A b b association 95% CL limit on σ(bbφ) B(φ ττ)(pb) Preliminary 8pb 35.9 fb (3 TeV) Observed Expected ±σ Expected ±σ Expected.35pb tanβ Preliminary mod+ m h scenario, = GeV excluded region 35.9 fb (3 TeV) 95% CL Excluded: Observed ± σ Expected Expected ± σ Expected MSSM m h 5 ± 3 GeV 3 3 m φ (GeV) 5 5 m A (GeV) 8

19 PAS IG68 Extended iggs Sectors Search for additional neutral iggs bosons in the bottom quarks final state only possible with dedicated triggers requiring b-jets Sensitivity enhanced with b-associated production analysis is unique at the LC so far Events / 5 GeV 35.7 fb (3 TeV) Preliminary Data 4 Background ± std. deviation ± std. deviation 3 ma/ = 3 GeV, σ = 5 pb ma/ = 6 GeV, σ = pb ma/ = 3 GeV, σ = 9 pb Data-Bkg. No evidence for a signal is found Interpretation in the context of MSSM and DM Bkg. dijet invariant mass M 6 [GeV] M 6 [GeV] Expected 68% expected 95% expected 35.7 fb (3 TeV) Preliminary p. 5 4 A/ bb, m = 5 GeV A/ Observed 68% expected Expected 95% expected mhmod+ 8 3 σxbr mmod+ scenario h = + GeV 5 ma/ [GeV] DM type-iv 6 Observed Expected 68% expected 95% expected mh, 5 ± 3 GeV 35.7 fb (3 TeV) Preliminary DM flipped scenario tanβ Observed ex 95% CL upper limits 6 ev 35.7 fb (3 TeV) 8T Preliminary 7+ tanβ σ(bba/) Β(A/ bb) [pb] M [GeV] ma [GeV] cos(β-α) 9

20 Summary has a broad program of iggs boson related searches since Run and continuing in Run Using the first Run data (~36 fb ), everything is more precise improved sensitivity of couplings and properties refinement of methods unprecedented studies on fermionic decays of (5) More Run data (7+8) to be analyzed and included watch this space! Publications :

21 Backup

22 Run Legacy PRL 4 (5) 983 The combination based on the discovery channels γγ and ZZ 4l ATLAS and Run Total Stat. Syst. LC Total Stat. Syst. ATLAS γ γ 6. ±.5 ( ±.43 ±.7) GeV γ γ 4.7 ±.34 ( ±.3 ±.5) GeV ATLAS ZZ 4l 4.5 ±.5 ( ±.5 ±.4) GeV ZZ 4l 5.59 ±.45 ( ±.4 ±.7) GeV ATLAS + γ γ 5.7 ±.9 ( ±.5 ±.4) GeV ATLAS + 4l 5.5 ±.4 ( ±.37 ±.5) GeV ATLAS + γ γ +4l 5.9 ±.4 ( ±. ±.) GeV m m = 5.9 ±.4 (±. stat. ±. syst.) GeV [GeV]

23 Run Legacy JEP 8 (6) 45 The combination based on 5 production processes and 6 decay modes ggf ATLAS and LC Run ATLAS+ ATLAS ±σ ±σ γ γ ATLAS and LC Run ATLAS+ ATLAS ±σ ±σ κ Z ATLAS and LC Run ATLAS+ ATLAS σ interval σ interval VBF W Z tt ZZ WW ττ κ W κ t κ τ BRBSM = bb κ b Parameter value Parameter value κ signal strength μ = σbr/σsmbrsm 3 Parameter value Production and decays are compatible with SM iggs : global μ =.9 ±. Couplings compatible with SM < σ No hint of BSM particles in the loop (gg, γγ), BRBSM <.34 at 95% CL 3

24 ZZ 4l JEP (7) 47 Signal strength on each production mode, integrated fiducial and differential cross sections of (5) +. =. gg. +.3 =.5 VBF =. Vhad =. Vlep. +.9 =.. tt m 35.9 fb (3 TeV) ZZ* 4l = 5.9 GeV +.9 =.5 comb (fb) σ fid (fb) σ fid Ratio to NNLOPS fb (7 TeV), 9.7 fb (8 TeV), 35.9 fb (3 TeV) Data (stat. sys. unc.) Systematic uncertainty Standard model LC XSWG YR4, m =5.9 GeV pp ( 4l) + X s (TeV) Data (stat. sys. unc.) Systematic uncertainty gg (NNLOPS) + X gg (POWEG) + X X = VBF + V + tt (POWEG) (LC XSWG YR4, m =5.9 GeV) 35.9 fb (3 TeV) p (jet) > 3 GeV, η(jet) <.5 T 3 N(jets) () (fb/gev) T dσ fid /dp (jet) (fb/gev) Ratio to NNLOPS T dσ fid /dp Ratio to NNLOPS Data (stat. sys. unc.) Systematic uncertainty gg (NNLOPS) + X gg (POWEG) + X X = VBF + V + tt (POWEG) (LC XSWG YR4, m =5.9 GeV) 35.9 fb (3 TeV) Data (stat. sys. unc.) Systematic uncertainty gg (NNLOPS) + X gg (POWEG) + X X = VBF + V + tt (POWEG) (LC XSWG YR4, m =5.9 GeV) () > GeV) T σ(p 5 p () (GeV) T 35.9 fb (3 TeV) p (jet) > 3 GeV, η(jet) <.5 T p (jet) (GeV) T 4

25 γγ PAS IG6-4 PAS IG75 Events are classified according to mass resolution and S/B in the VBF, V, tt and gluon fusion categories standard preselection p T /mγγ >.33, p T /mγγ >.5, < mγγ < 8 GeV A likelihood scan of the signal strength is performed, profiling all other nuisances including the iggs mass Cross section ratios measured for each process (black points) in the iggs Simplified Template Cross Section framework Preliminary γγ 35.9 fb (3 TeV) Untagged Untagged gg VBF tt bb tq tw W hadronic W leptonic Z hadronic Z leptonic 45.8 expected events 48.6 expected events σeff σm S/(S+B) Preliminary γγ 35.9 fb (3 TeV) Per process ± σ Untagged Untagged expected events 6. expected events gg SM Prediction VBF VBF. expected events 8.6 expected events VBF m profiled VBF tt adronic 7.8 expected events 5.8 expected events tt tt Leptonic Z Leptonic 3.8 expected events.5 expected events W leptonic W Leptonic V LeptonicLoose 3.6 expected events.8 expected events Z leptonic V adronic V MET 9.7 expected events 4. expected events Signal Fraction (%) Width (GeV) S/(S+B) in ± σeff V hadronic σ proc /σ theo 5

26 γγ PAS IG6-4 PAS IG75 κ g Preliminary 35.9 fb (3 m profiled Best Fit κ γ σ σ SM TeV) q(κ γ,κ g ) κ f Best Fit σ σ SM Preliminary m profiled 35.9 fb ( κ V TeV) q(κ V,κ f ) Two-dimensional likelihood scans of the iggs boson coupling modifiers Differential cross section (fb/gev) γγ dσ fid /dp T 3 Ratio to amc@nlo + X Preliminary 35.9 fb (3TeV) γ Data γ LC XSWG YR4, m =5.9 GeV gg amc@nlo + X gg POWEG + X X amc@nlo γ γ ) dp γ γ (p γγ T T fid σ 35.5 p T [GeV] γ γ p T 3 (GeV) (fb) dσ fid /dn j 3 Ratio to amc@nlo + X Preliminary 35.9 fb (3TeV) γ Data γ LC XSWG YR4, m =5.9 GeV gg amc@nlo + X gg POWEG + X X amc@nlo N j ( η <.5) j 3 4 N j ( η <.5) j 6

27 WW lν PAS IG6-4 The first observation above 5σ from WW channel (eμ, ee, μμ) at combining gg, VBF, Z and W productions Signal strength shows compatibility with the SM predictions some deviation observed in -jet V-tagged category (hadronic decay of W/Z) -jet DF gg-tagged +.4 = jet DF gg-tagged +.3 = jet DF gg-tagged +.54 = jet SF gg-tagged +.6 = jet SF gg-tagged +.94 = jet VBF-tagged +.44 = jet V-tagged +.3 = lepton W-tagged +.76 = lepton Z-tagged +.49 =.77. Preliminary 35.9 fb (3 TeV) =.8 comb WW Combination SM σ/σ SM gg VBF W Z =.38 =.9 = 3.7 = Preliminary 35.9 fb (3 TeV) =.8 comb Combination SM WW σ/σ SM κ F Preliminary 35.9 fb (3 TeV) 68% CL 95% CL Best fit SM κ V =. ±.8 κ F =.5 ±.48 κ V lnl Main systematic uncertainties from lepton ID, luminosity and background rates 7

28 WW lν PAS IG6-4 A summary of the expected fraction of different signal production modes in each category A similar simultaneous fit has been performed to measure the cross section ratios corresponding to five iggs boson production mechanisms, using a simplified fiducial phase space, as specified in the stage- STXS framework Additional simultaneous fits are performed to probe the iggs boson couplings to fermions and vector bosons μf signal strength associated to gg, bb, tt μv signal strentgth associated to VBF, V -jet gg-tagged -jet SF gg-tagged -jet gg-tagged -jet SF gg-tagged -jet gg-tagged -jet VBF-tagged Preliminary 59.4 events 4.3 events 33.3 events 9.7 events 3.3 events 3. events 35.9 fb (3 TeV) gg VBF W Z bb tt +. σ gg /σ SM = σ VBF /σ SM = σ W lep. /σ SM =.8.64 Preliminary 35.9 fb (3 TeV) y <.5 SM prediction WW F Preliminary 35.9 fb (3 TeV) 68% CL 95% CL Best fit SM lnl -jet V-tagged 3-lepton W-tagged 4-lepton Z-tagged 9.6 events 5.6 events.7 events Signal fraction +.68 σ Z lep. /σ SM = σ V had. /σ SM = σ/σ SM V 6 4 8

29 PAS IG7-3 Combination invisible BR( invisible) translated into DM-nucleon spin-independent cross section limits as a function of DM mass (if DM mass < mh/)* ] fb (3 TeV) [cm DM-nucleon σ SI Preliminary 9% CL Limits B( inv) <. Fermion DM Scalar DM Direct Detection LUX CDMSLite XENONT CRESST-II Assuming scalar, fermion dark matters 9% CL to compare with direct detection experiments PandaX-II limits complementary to direct detection experiments 48 *A. Djouadi et al, Phys. Lett. B 79 () 3 m DM [GeV] 9

30 PAS IG7-6 tt bb (leptonic) 3

31 (5) Combination PAS IG7-3 Constraints on benchmark BSM which contains a second iggs doublet (DM) tanβ Preliminary 35.9 fb (3 TeV) tanβ Preliminary 35.9 fb (3 TeV) DM Type-I all fermions coupling to one iggs doublet DM Type-III lepton specific quarks coupling to one iggs doublet leptons to another DM Type I Observed 95% CL Expected 95% CL cos(β-α) tanβ Preliminary allow allow DM Type III 35.9 fb (3 TeV) Observed 95% CL Expected 95% CL cos(β-α) DM Type II Observed 95% CL Expected 95% CL cos(β-α) tanβ Preliminary allow allow DM Type IV 35.9 fb (3 TeV) Observed 95% CL Expected 95% CL cos(β-α) DM Type-II up-type fermions coupling to one iggs doublet down-type to another DM Type-IV flipped up-type quarks and leptons coupling to one iggs doublet down-type quark to another 3

32 MSSM ττ PAS IG7-95% confidence level (CL) upper limits are set on the product of the cross section and branching fraction Differences in the sensitivity of the analysis only occur at low masses, where the p T of the iggs boson significantly contributes to the p T of its decay products the expected limit using either only the b quark or only the t quark for the modeling of the iggs boson p T spectrum 95% CL limit on σ(ggφ) B(φ ττ)(pb) 3 3 Preliminary Coupling-dependent region 35.9 fb (3 TeV) Observed Expected ±σ Expected ±σ Expected Expected b quark only Expected t quark only 3 m φ (GeV) tanβ Preliminary hmssm scenario 35.9 fb (3 TeV) 95% CL Excluded: Observed ± σ Expected Expected ± σ Expected 5 5 m A (GeV) 3