Supersymmetry Searches at ATLAS and CMS UK HEP Forum 2012 Friday 23 rd November, 2012

Transcription

1 Supersymmetry Searches at ATLAS and CMS UK HEP Forum Friday 3 rd November, Sky French Pembroke College, University of Cambridge Sky French (Cambridge) UK HEP Forum Friday 3 rd November, / 4

2 An Introduction Very many Searches for Supersymmetry completed by both the ATLAS and CMS collaborations in and It is a privilege to attempt to summarise these searches here... I will do my best to summarise it all, where possible showing the latest ones (i.e. SUSY and HCP, 7 TeV and 8 TeV) from both experiments See: SupersymmetryPublicResults and https: //twiki.cern.ch/twiki/bin/view/cmspublic/physicsresultssus for a complete list and all the details! And probably more to come before the year is over! Sky French (Cambridge) UK HEP Forum Friday 3 rd November, / 4

3 How many searches? Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 3 / 4

4 ATLAS SUSY Searches ( - ) see: AtlasPublic/SupersymmetryPublicResults L dt = 4.7 fb at s = 7 TeV ] Total Integrated Luminosity [fb 7 ATLAS Online Luminosity s = 7 TeV LHC Delivered ATLAS Recorded Total Delivered: 5.6 fb Total Recorded: 5.5 fb L dt = > 5 fb at s = 8 TeV 8/ 3/4 3/6 3/8 3/ Day in 5 papers and 8 CONF notes with L dt = - fb + papers and 7 CONF notes with L dt = 4.7 fb + 35 pb results ] Total Integrated Luminosity [fb ATLAS Online Luminosity LHC Delivered ATLAS Recorded Total Delivered:.9 fb Total Recorded: 9.5 fb = 8 TeV 9/3 5/5 /7 8/9 5/ s Day in notes with L dt 6 3 fb (6 new at HCP last week) Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 4 / 4

5 CMS SUSY Searches (- ) see: PhysicsResultsSUS R L dt = 4.7 fb at s = 7 TeV R paper and 3 notes with - fb R papers and notes with 5 fb s = 8 TeV L dt = R L dt 7 notes with + 35 pb results Sky French (Cambridge) L dt > 5 fb at R L dt = 4- fb (4 new at HCP last week) UK HEP Forum Friday 3rd November, 5 / 4

6 An Introduction Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 6 / 4

7 Supersymmetry () Standard Model: Weak scale SUSY is one of the most extensively studied extensions to the Standard Model Postulates superpartners for all the SM particles: SM fermions SUSY bosons SM bosons SUSY fermions Supersymmetry: Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 7 / 4

8 Supersymmetry () Supersymmetry is not just one model... If R parity is conserved R p = ( ) (3B 3L+s), SM (SUSY) particles have R p = + (-) The lightest supersymmetry particle (LSP) is stable, it does not decay SUSY particles are produced in pairs (but of course this need not be the case) SUSY must be a broken symmetry e.g. through a hidden sector with a messenger field Supergravity break SUSY via gravity GMSB break SUSY via new gauge interactions AMSB SUSY is broken by anomalies Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 8 / 4

9 Supersymmetry (3) We ve perhaps been expecting SUSY for quite some time... But we ve seen no sign of her... is the theory wrong? is she hiding?... wide range of signatures, and many places to hide... Key Motivations? Dark matter - WIMP fits with SUSY Light Higgs - new physics is needed to stabilise mass mh = λ f [ ] 6π Λ UV + 6m f ln(λ UV /m f ) +... UV cut-off gives finite mass mh = λs [ ] 6π Λ UV m s ln(λ UV /m s) +... SUSY provides correct coupling and number of states for cancellations Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 9 / 4

10 Where to begin? Sky French (Cambridge) UK HEP Forum Friday 3 rd November, / 4

11 Plot by T. Khoo Cross section / pb σ q NLO ( q*) σ g NLO ( g) σ NLO ( tt*) σ + NLO ( ) Strong Production 3 s = 7 TeV Mass / GeV Search for the most obvious thing (?) The LHC is a QCD machine st and nd generation squarks (ũ, d, s, c) and gluinos will be produced dominantly (unless the 3 rd generation and electroweak sparticles are much lighter) If R-parity is conserved: neutral light LSP, sparticles produced in pairs Look for the strong production and decay of squarks and gluinos q q, q g, g g q and g cascade through lighter sparticles to reach the LSP ET miss (from escaping LSPs) signature, expect jets Any sleptons and gauginos produced in the cascades can give leptons, further-jets, b-jets etc Sky French (Cambridge) UK HEP Forum Friday 3 rd November, / 4

12 q ATLAS -Lepton Search 8 TeV 5.8 fb ATLAS-CONF--9 Target g q q and q q decays Following q q, q g, g g production expect different jet multiplicity depending on the process Search in events with -6 jets +ET miss at high m eff (m eff : scalar sum of jet p T and E miss T ) 3-jet selection: events / GeV DATA / MC 4 ATLAS Preliminary L dt = 5.8 fb SRB 3 jets Data ( s = 8 TeV) SM Total 3 SM+SU(6,4,,) Multijet tt & single top W+jets Z+jets Diboson m (incl.) eff (incl.) m 6-jet selection: events / GeV DATA / MC ATLAS Preliminary SRE 6 jets L dt = 5.8 fb Data ( s = 8 TeV) SM Total SM+SU(6,4,,) Multijet tt & single top W+jets Z+jets Diboson m (incl.) eff (incl.) m squarks and gluinos with direct decays to the SM and LSP squark mass Squark gluino neutralino model, m( ) = GeV ATLAS Preliminary L dt = 5.8 fb, s=8 TeV lepton combined SUSY Observed limit ( σ ) theory Expected limit ( σ exp ) Observed limit (4.7 fb, 7 TeV) msugra/cmssm framework m / MSUGRA/CMSSM: tanβ =, A =, µ> ( GeV) ATLAS q (4 GeV) g (6 GeV) q (8 GeV) Preliminary g ( GeV) g (4 GeV) g ( GeV) gluino mass L dt = 5.8 fb, s=8 TeV lepton combined SUSY Observed limit ( σ ) theory Expected limit ( σ exp ) Observed limit (4.7 fb, 7 TeV) Non convergent RGE No EW SB m Sky French (Cambridge) UK HEP Forum Friday 3 rd November, / 4

13 CMS -Lepton Search 7 TeV 4.98 fb CMS-SUS--, arxiv:7.898 H T (left) and missing H T (right) Search in events with 3 jets +ET miss at high H T (H T : scalar sum of jet p T) Aside on the CMSSM? Often used as a benchmark Pick tan β =, A =, µ >, scan m, m / Only weak dependence on tan β up to 4 Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 3 / 4

14 q q SUSY theory ATLAS Lepton 4 jets 8 TeV 5.8 fb ATLAS-CONF--4 Strongly interactive SUSY particles can decay into jets, the LSP and leptons e.g. q q qw qe ν e Consider 4 jet final states, and one isolated electron or muon Veto on nd lepton to remove overlap with other searches Look at high ET miss, m eff, m T and ET miss /m eff >. Electron channel: Events / GeV Data / SM Data() SM Total Ldt=5.8 fb, s = 8TeV multijets W+jets Electron channel Z+jets Signal Region Dibosons tt ATLAS Preliminary single top MSUGRA m =4 m / = minc eff (GeV) Muon channel: Events / GeV Data / SM Data() SM Total Ldt=5.8 fb, s = 8TeV multijets W+jets Muon channel Z+jets Signal Region Dibosons tt ATLAS Preliminary single top MSUGRA m =4 m / = minc eff (GeV) msugra/cmssm framework m / MSUGRA/CMSSM: tanβ =, A =, µ> ATLAS Preliminary (6) () q (4) L = 5.8 fb, s=8 TeV lepton + 4jets + MET g (8) g (6) g () g () Observed limit ( σ Expected limit ( σ exp ) Observed limit () LEP No EW SB Non convergent RGE m ) see also: CMS-SUS-- OS-dilepton, ATLAS-CONF--5 SS-dilepton searches Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 4 / 4

15 CMS and ATLAS searches have excluded light squarks and gluinos up to TeV ATLAS-CONF--9 PRL 9, 783 squark mass MSUGRA/CMSSM: tanβ =, A =, µ> CDF, Run II, tanβ = 5, µ< D, Run II, tanβ = 3, µ< ATLAS Preliminary L dt = 5.8 fb, lepton combined s=8 TeV SUSY Observed limit ( σ ) theory Expected limit ( σ exp ) Theoretically excluded Stau LSP gluino mass q) m( CMS, L dt = 4.98 fb, Observed s = 7 TeV Observed σ signal theory Expected σ exp. Tevatron RunI CDF RunII D RunII LEP tanβ=, µ>, A = no CMSSM solution m( g) m q.4 TeV, m g 9 GeV OR m q m g.4 TeV... but they are not as sensitive to the 3 rd generation. Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 5 / 4

16 CMS -Lepton α T search b b b b 8 TeV 3.9 fb CMS PAS SUS--6 Updated to.7 fb at HCP (CMS PAS SUS--8) Again design for sensitivity to ET miss Hadronic sample: signatures in events with jets But categorise by no. b-jets (,,, 3) () improves sensitivity to third-generation squark signatures () whilst retaining sensitivity to massive coloured particle production processes ( q q, q g, g g) α T is used to remove QCD Search in bins of H T and no. b-jets (H T : scalar sum of jet p T) Events / bin CMS Preliminary, 3.9 fb, Data (µ s = 8 TeV + jets sample, n Standard Model 3) Expected Unc. SM + SUSY ( g g tt tt ) (m = 8 GeV, m = GeV) gluino LSP H T (GeV) µ+jets (control) sample: Events / bin CMS Preliminary, 3.9 fb s = 8 TeV H T (GeV), Data (hadronic sample, n Standard Model 3) Expected Unc. SM + SUSY ( g g tt tt ) (m = 8 GeV, m = GeV) gluino LSP Simplified model, pp g g t t t t a (GeV) m LSP CMS Preliminary pp # g g, g # t + LSP; m( t)>>m(g ) Expected Limit! exp.! NLO+NLL! theory - CL s, 3.9 fb, " T s=8 TeV m gluino (GeV) a NB: m( t) >> m( g), stop off-shell 95% C.L. upper limit on! (pb) see: also ATLAS ATLAS-CONF jets Lepton Search Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 6 / 4

17 Natural SUSY? Lawrence Hall, SUSY LHC TeV 5 GeV µ M! Natural Spec"u# h h + h General bottom-up viewpoint The Nuclear Family of the Higgs t bl t ( ( g ) w ) B q, br l Distant Cousins Closeness to Higgs Returning to: m H = λ f 6π [ Λ UV + 6m f ln(λ UV /m f ) +... ] Dominant loop is from t: only the 3 rd generation squarks need to be light 3 rd generation cross-section smaller - existing limits don t rule this out. Generally speaking Jets +ET miss but not t, b searches probe ũ, d, c, s Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 7 / 4

18 Natural SUSY? 3 rd Generation 3 rd generation squarks can be relatively light (5-5 GeV), produced in pairs with high-cross section, or appear in gluino cascade decay (gluinos can t be too heavy). Direct Production: expect bs, W s, ts and E miss T Gluino mediated: all of the above - +jets Gauginos Should be light Signature expected: leptons, ET miss, no jets Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 8 / 4

19 ATLAS Direct Stop Searches Final results (at s = 7 TeV, 5 fb ) summarised in the t plane below m( t) > m(t): hadronic or leptonic top decays with extra E miss T ( t t Wb ) m( t) < m(t): top-like decay via chargino, lower p T leptons ( t b bw ( ) ) arxiv: arxiv: 9. arxiv: arxiv: 8.59 arxiv: Can ATLAS fill in the white spaces at 8 TeV? Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 9 / 4

20 ATLAS Very Light Stop Search 7 TeV 4.7 fb arxiv:8.435 Entries / GeV Search for pair produced light scalar top quarks lepton final state High ET miss, at least one jet, low lepton p T 4 3 ATLAS L dt = 4.7 fb all channels Data ( s Standard Model tt = 7 TeV) Single top, dibosons, W+jets Z/γ*+jets m( t)= GeV, m( )=55 GeV m( t)=6 GeV, m( )=55 GeV Signal concentrated at low lepton p T Entries / GeV Data/SM 3 ATLAS L dt = 4.7 fb ee channel Data ( = 7 TeV) >3 s Standard Model tt Single top, dibosons, W+jets Z/γ*+jets m( t)= GeV, m( )=55 GeV m( t)=6 GeV, m( )=55 GeV leading e p T Assume t b, decays via a virtual W boson Assume m( ) = 6 GeV m ATLAS L dt = 4.7 fb, s = 7 TeV Observed limit ( Expected limit ( CDF 95% Exclusion All limits at 95% CL BR( t b ) = % m( ) = 6 GeV SUSY σtheory ) σ exp ) m t Data/SM miss ET (corresponds to dark green patch on previous slide) Sky French (Cambridge) UK HEP Forum Friday 3 rd November, / 4

21 CMS Direct Stop Search 8 TeV 9.7 fb CMS PAS SUS--3 New at HCP P P Single isolated e or µ, jets and large E miss T Sensitivity to t t, t b bw High p T jets (incl. b jets), ET miss signature Search at high m T t t t t P P t t + W + b W b M T > 5 GeV corresponds to one signal region. Data/Bkg Entries / 3 GeV CMS Preliminary miss E T > GeV - s = 8 TeV, Ldt = 9.7 fb Data M T l top tt ll W+jets rare SM + t t (45/5) SM + t b (45/5/.75) Stop to top m CMS Preliminary pp t t*, t t 5 / 5 t L / t R mixture - = 8 TeV, Ldt = 9.7 fb NLO-NLL exclusions theory Observed σ Expected σ m t Stop to bottom m CMS Preliminary pp t t*, t b b W 5 / 5 t L / t R mixture m =.5 m +.5 m m t t s s - = 8 TeV, Ldt = 9.7 fb NLO-NLL exclusions theory Observed σ Expected σ % C.L. UL on σ BR [pb] 95% C.L. UL on σ BR [pb] Sky French (Cambridge) UK HEP Forum Friday 3 rd November, / 4

22 CMS SS-dilepton and b-jets search 8 TeV 3.95 fb CMS PAS SUS--7 Updated to.5 fb at HCP (CMS PAS SUS--9) Search in various bins of the H T / ET miss plane (3 events in total) Backgrounds: fake leptons (from HF decays, mis-identified hadrons, muons from meson decay in flight, electrons from conversions) charge flip, rare SM processes with SS leptons and b-jets (e.g. pp t tw ) Events / GeV Events / GeV CMS Preliminary s = 8 TeV miss E T > GeV, N b-jets Observed Fakes Irreducible (MC) Charge MisID Total Uncertainty - = 3.95 fb H T (GeV).5 > 8 GeV, N.5.5 CMS Preliminary s = 8 TeV H T b-jets Observed miss E T (GeV) L int. L int. Fakes Irreducible (MC) Charge MisID Total Uncertainty - = 3.95 fb Analysis is sensitive to both gluino mediated, and direct production, of 3 rd generation squarks. P m( t ) GeV P CMS, g g s = 7 TeV, L int t t t t = 4.98 fb Same Sign dileptons with btag selection prod Exclusion σ = σ NLO+NLL σ m( ) = 5 GeV m( ) = 5 GeV m( g) GeV - t t Sky French (Cambridge) UK HEP Forum Friday 3 rd November, / 4

23 ATLAS lepton 3 b-jets Search 8 TeV 3. fb ATLAS-CONF--45 New at HCP 4 or 6 jets, 3+ b-tagged E miss T > GeV Define multiple signal regions using different m eff cuts Events / 5 GeV ATLAS Preliminary Ldt =.8 fb, s = 8 TeV SR4 L Gbb: m g Gbb: m g Data SM total top production tt+b/bb production W production Z production diboson =, m =, m = Backgrounds: = miss E T Dominated by: t t+jets Others: t t + b/b b, W, Z and diboson Assume pp g g g b b via off-shell sbottom g t t via off-shell stop m m g g production, g tt+, m( q) >> m( g) ATLAS 3 b jets channel g tt+ Preliminary forbidden =.8 fb, s=8 TeV m g g g production, g tt+, m( q) >> m( g) ATLAS 3 b jets channel g tt+ Preliminary forbidden int L Expected limit σexp Observed limit All limits at 95% CL SUSY σtheory 3 b jets, 4.7 fb at 7 TeV int L =.8 fb, Expected limit σexp Observed limit All limits at 95% CL s=8 TeV SUSY σtheory 3 b jets, 4.7 fb at 7 TeV m g Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 3 / 4

24 CMS search for τ-leptons in all hadronic events 7 TeV 4.98 fb CMS PAS SUS--4 Not just searches for light stop/bottom. Could also be light τ τ production with jets and E miss T Events / GeV (b) - CMS Preliminary, 4.98 fb, Data s = 7 TeV tt QCD W( lν)+jets Z( νν)+jets Z( ττ)+jets [m,m ]=[8,3] / m LSP 8 6 (a) P P g NLSP CMS Preliminary fb, s = 7 TeV Obs. Limit Exp. Limit Exp. σ Obs. σ (theory) q q τ τ q q M eff 4 Excluded m g Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 4 / 4

25 High luminosity brings sensitivity to electroweak production... If coloured SUSY particles are very massive while non-coloured SUSY particles are light, weak gauginos and sleptons may dominate SUSY production at the LHC. Limits on q and g masses pushed very high Naturalness favours gaugino masses GeV Search strategy? e.g. Targeted Process Signal Region Two-lepton Final States l l (l ) + (l ) SR-m T (l ν ) + (l ν ) SR-m T, SR-OSjveto i (l l ) + (q q ) SR-jets Three-lepton Final States (l l ) + (l ν ) SR-OSjveto, SR-SSjveto Table: Decay modes targeted by each SR in arxiv:8.884, i denotes either a chargino or a neutralino. In decays producing three real leptons, one must be mis-reconstructed or fall outside the acceptance of the detector. Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 5 / 4

26 m l m l l ATLAS direct slepton and gaugino production 7 TeV 4.7 fb arxiv:8.884 Search for l l pair-production and, lepton final state Entries / GeV Data/MC Same Flavour Channels [OS] N =, m m Z >GeV jet ll ATLAS Ldt= 4.7fb Data ( s=7tev) Total Standard Model Fake leptons Z/γ*+jets tt Single top Diboson =3GeV, m =GeV =9GeV, m =GeV m T High-m T brings particular sensitivity to l and pair production Limits on direct l production. mass ATLAS L dt = 4.7 fb + + l l l m(l l ) )< m( s=7tev SUSY Observed limit ( σ ) theory Expected limit ( σ exp ) LEP µ excluded R l mass Sensitivity to weak production processes limited by the lower cross-section. mass ATLAS + L dt = 4.7 fb m m ν, m m s=7tev lν( νl) =.5 m( ) )= m( lν SUSY Observed limit ( σ ) theory Expected limit ( σ exp ) mass See: 3 leptons at ATLAS 7 TeV (arxiv:8.344), 3 leptons at ATLAS 8 TeV (ATLAS-CONF--54) Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 6 / 4

27 CMS direct slepton and gaugino production 8 TeV 9. fb CMS SUS--8 New at HCP 3 leptons, 4 leptons, two SS leptons, two OS-SF leptons... P P ν l l ν ν l p p p p l l Z W l ν l l m m 5 5 CMS Preliminary pp e L Br( l L l el, µ L µ L ) = = 8 TeV, L int - = 9. fb m l CMS Preliminary m LEP slepton limit s 95% C.L. CLs NLO Exclusions Observed Expecteded LEP chargino limit + - pp, ( l L, BF(l l )=.5) + - pp, ( l R, BF(l l )=) pp, ( no l, BF(WZ)=) pp, ( l L, BF(l l )=) = m > m theory σ σ - s = 8 TeV, L = 9. fb int [fb] 95% CL upper limit on σ m l =.5m +.5m m = m Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 7 / 4

28 RPV, Long-lived Particles? If R-parity isn t conserved -... lower E miss T SUSY particles decaying to SM particles possibilities for different final states Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 8 / 4

29 ATLAS 4 Lepton RPV Search 8 TeV 3. fb ATLAS-CONF--53 New at HCP Search for RPV SUSY with four or more leptons (electrons or muons) Non-zero λ coupling Irreducible (four real, isolated leptons) and reducible (at least one fake) background components ZZ, WZ and t t dominate in the SR Moderate ET miss, high m eff Events / GeV Events / GeV ATLAS Preliminary L dt = 3.fb s = 8TeV miss SR (E T > 5 GeV) data Total SM Red. Bkg. ZZ ZWW ttz ttww SUSY ref. point ATLAS Preliminary L dt = 3.fb s = 8TeV SR (m eff > 3 GeV) miss E T data Total SM Red. Bkg. ZZ ZWW ttz ttww SUSY ref. point m eff Simplified model interpretation Pair produce wino-like charginos ( W ) m ẽ + R Expected limit ( σ exp ) SUSY Observed limit ( σtheory ) prev. ATLAS exclusion Tevatron exclusion LEP exclusion not explored m e e+ (µ + ) < m λ ATLAS Preliminary explored LSP mass range: GeV < m < m GeV L dt = 3. fb, s=8 TeV simplified model, grid, λ > All limits at 95% CL m ν µ ( ν e ) Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 9 / 4

30 ATLAS Disappearing Track 7 TeV 4.7 fb arxiv:.85 Direct chargino pair production in anomaly mediated SUSY breaking Chargino lifetime long enough to be detected in the tracking detectors search for tracks with few associated hits in the outer region of the tracker analyse the p T spectrum of such tracks No. outer hits in TRT for data and signal: Tracks Data SM MC prediction m m = GeV, τ = GeV, τ = ns = ns ATLAS = 7 TeV, (Decay radius < infinite) (Decay radius < 863 mm) L dt = 4.7 fb outer N TRT p T distribution of candidate tracks: Tracks / GeV 4 3 ATLAS s = 7 TeV, L dt = 4.7 fb track p T s Data Total background Hadron track background Electron track background m = GeV, τ =. ns m = GeV, τ =. ns m = GeV, τ =. ns Limits in AMSB model parameter space [MeV] m SUSY Observed 95% CL limit ( σ ) theory Expected 95% CL limit ( σ exp ) LEP exclusion Stable ATLAS L dt = 4.7 fb, tanβ = 5, µ > = 7 TeV Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 3 / 4 s m

31 Others? If SUSY particle masses are close together, reduce the p T in the final states Multiple jets, but little E miss T Compressed spectra, stealth SUSY... Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 3 / 4

32 CMS Stealth SUSY 7 TeV 4.98 fb arxiv:.5 q q γ S g Low ET miss, many energetic final-state objects S Light hidden sector particles can mediate decays to many low p T objects Very rich phenomenology G g Search in events with γγ+ 4 jets, and large total energy (no requirement on ET miss ) Events / (5 GeV) CMS fb, s = 7 TeV Data, 4-jets Expected Background Syst. Uncertainty M =9GeV q S Sideband T S T (GeV) σ (fb) CMS fb, s = 7 TeV M = / M q M =GeV, M =9GeV s s BR( γ s) = Observed Limit Expected Limit Stealth SUSY SD Expected 5 5 M (GeV) q Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 3 / 4

33 General Gauge Mediation The Gravitino G is the LSP and very light The nature of the NLSP determines the main signature of the decay Stau τ +E miss T Bino γ +E miss T 3 Wino W +E miss T 4 Higgsino H/Z +E miss T Gives lots of interesting things to look for: τs, γs... Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 33 / 4

34 CMS GGM γ(γ) + jet(s) + E miss T 8 TeV 4.4 fb CMS PAS SUS--8 m Addresses a General Gauge Mediation scenario G LSP, NLSP ( co-nlsp possible) Looking for γγ + jet + ET miss or γ + jet + ET miss Number of Events / GeV Data/Prediction CMS Preliminary - s = 8 TeV, Ldt = 4.4 fb >= Jet Requirement γγ Candidate Sample QCD + Electroweak Error QCD (fake fake sample) Electroweak GGM γγ (_7_375) GGM γγ (4_4_375) miss E T Backgrounds: Mis-measurement of ET miss QCD processes, multijets with jets mimicking γ in True ET miss events with real or fake γ, and a W boson decaying to an e mis-identified as a γ. NLSP bino or wino-like γ G Z G (with a wino-like NLSP, signal is suppressed by chargino decays without photons) ) (GeV/c m g 5 5 CMS Preliminary - Ldt = 4.4fb, s = 8 TeV GGM bino-like = 375 (GeV/c ) Jet Requirement NLO Limits Observed σ (theory) Expected σ (theory) σ (experimental) Excluded 5 5 (GeV/c ) m q Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 34 / 4

35 ATLAS Z +MET 8 TeV 5.8 fb ATLAS-CONF--5 New at HCP Events / GeV L dt 5.8 fb, s=8 TeV ee channel ATLAS Preliminary Data SM Background Z/γ*+jets tt WW WZ ZZ single top GGM m=6, g µ= GGM m=6, g µ=59 General Gauge Mediation scenario G LSP, NLSP is a Higgsino-like neutralino h G or Z G Search for events with at least one Z decay into OS l pairs and E miss T data / SM Events / GeV miss ET L dt 5.8 fb, s=8 TeV ee channel ATLAS Preliminary CR Data SM Background Z/γ*(ee)+jets top, WW, ττ WZ ZZ GGM m =6, µ= g GGM m =6, µ=59 g m g GGM: higgsino like ATLAS Preliminary L dt = 5.8 fb, miss Z+E T L dt = fb,, tan(β) =.5, M s=8 TeV s=7 TeV = M = TeV, m( q) =.5 TeV SUSY Observed limit ( σ ) theory Expected limit ( σ exp ) All limits at 95% CL m g < µ m( ) µ data / SM miss ET Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 35 / 4

36 A Summary? Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 36 / 4

37 Summary Plots: ATLAS + l ( ( e e T,miss T,miss T,miss T,miss,miss,miss T,miss,miss T,miss,miss T,miss L=5.8 fb, 8 TeV [ATLAS CONF 9] L=5.8 fb, 8 TeV [ATLAS CONF 4] L =5.8 fb L =5.8 fb L =4.7 fb L =4.8 fb L=4.8 fb, 7 TeV [ATLAS CONF 44] L =4.8 fb L=5.8 fb, 8 TeV [ATLAS CONF 5] L=.5 fb, 8 TeV [ATLAS CONF 47] L =.8 fb L =5.8 fb L =3. fb L =5.8 fb L =.8 fb L =4.7 fb L =3. fb L =4.7 fb L =4.7 fb L =4.7 fb L =4.7 fb, 7 TeV [8.59] L =4.7 fb, 7 TeV [8.447] L =. fb L =4.7 fb L =4.7 fb L =3. fb L =3. fb L =4.7 fb L=4.7 fb, 7 TeV [.597] L=4.7 fb, 7 TeV [.597] L=4.7 fb, 7 TeV [.597] L=4.4 fb, 7 TeV [.745] L=4.6 fb, 7 TeV [Preliminary] L=4.6 fb, 7 TeV [Preliminary] L=4.7 fb, 7 TeV [ATLAS CONF 4] L =3. fb L =3. fb, 8 TeV [ATLAS CONF 9], 8 TeV [ATLAS CONF 9], 7 TeV [8.4688] L=4.7 fb, 7 TeV [8.4688] L=4.7 fb, 7 TeV [.34], 7 TeV [9.753], 7 TeV [.67], 8 TeV [ATLAS CONF 45], 8 TeV [ATLAS CONF 5], 8 TeV [ATLAS CONF 5], 8 TeV [ATLAS CONF 3], 8 TeV [ATLAS CONF 45], 7 TeV [ATLAS CONF 6], 8 TeV [ATLAS CONF 5], 7 TeV [8.435], 7 TeV [9.], 7 TeV [9.486], 7 TeV [4.6736], 7 TeV [8.884], 7 TeV [8.884], 8 TeV [ATLAS CONF 54], 8 TeV [ATLAS CONF 54], 7 TeV [.85], 8 TeV [ATLAS CONF 53], 8 TeV [ATLAS CONF 53] L=4.6 fb, 7 TeV [.483] L=4.6 fb, 7 TeV [.486] 3 GeV 367 GeV L=.5 fb, 8 TeV [ATLAS CONF 47]. TeV (tanβ > ).7 TeV (m( ) > 5 GeV) 69 GeV 9 GeV (m(h (m( ) > GeV) 69 GeV ) > / 4 (m(g GeV) 645 GeV ) >.4 TeV (m( ) < GeV) (m( 85 GeV ) < 3 GeV) (m( 86 GeV ) < 3 GeV). TeV (m( ) < 3 GeV) (m(.5 TeV ) < GeV) (m( 48 GeV ) < 5 GeV) (m( ) = 45 GeV m( (m( ) < 7 GeV) (m( ) = 55 GeV) (m( GeV ) = ) (m( 3 44 GeV ) = ) (m( GeV ) = ) 3 GeV (5 < m( ) < 3 GeV) l (m( ) = ) 34 GeV ) < GeV, (m( m(l,ν ) = (m( ) + m( 58 GeV ) =, m( l ) as above) (m( ) = m(,ν 4 95 GeV ) =, sleptons decoupled) (m( ) = m( GeV ( < τ( ) < ns) 985 GeV 8595 GeV 3 GeV 87 GeV 43 GeV 683 GeV (5 < tanβ < ) 5, 5 7 GeV (.3 < λ <.5, mm < cτ,.6 TeV τ,. TeV τ. TeV (cτ < mm) + 7 GeV LSP ) > 3 GeV, λ or λ l (m( (m( ) > GeV, m( l e)=m( l µ)=m( l τ), λ 666 GeV 74 GeV 9 GeV.8 TeV.38 TeV.4 TeV.5 TeV.4 TeV (m(q ) < TeV, light ) (m(g ) < TeV, light ) (m( ) = < 5) (tanβ (m( )+m( g)) or λ > ) < m, g decoupled) ATLAS SUSY Searches* 95% CL Lower Limits (Status: HCP ) Inclusive searches Pheno model : lep + j s + E T (g,miss Gluino med. qq ) : lep + j s + E T,miss GMSB GMSB (τ ( NLSP) : lep (OS) + j s + E T,miss NLSP) : τ + lep + j s + E GGM (bino NLSP) : γγ + E GGM (wino NLSP) : γ + lep + E GGM (higgsino bino NLSP) : γ + b + E GGM (higgsino NLSP) : Z + jets + E T,miss Gravitino g tt (virtual b LSP : monojet + E T,miss g bb ) : lep + 3 b j s + E T,miss (virtual g tt g tt t) : lep (SS) + j s + E T,miss (virtual t) : 3 lep + j s + E T,miss g tt b b (virtual t) : lep + multi j s + E T,miss (virtual t) : lep + 3 b j s + ET, b b b b : lep + b jets + ET, b tt (very light), t : 3 lep + j s + E t b T,miss : lep + E (light), t b T,miss tt t t : / lep + b jet + E T,miss tt (medium), t t : lep + b jet + E T,miss tt (heavy), tt (heavy), t t : lep + b jet + E T,miss : lep + b jet + E T,miss tt (natural GMSB) : Z( ll) + b jet + E + +, l l l l L, l,miss L : lep + ET ν(lν ) lν : lep + ET ) ) Direct l νlll(νν), lνlll(ν L W * Z * ν) : 3 lep + E : 3 lep + E T,miss pair prod. (AMSB) : long lived Stable g R hadrons : low β, βγ (full detector) Stable t R hadrons : low β, βγ (full detector) GMSB : stable τ qqµ (RPV) : µ + LFV : pp ν heavy displaced vertex LFV : pp ν +X, ν τ resonance +, + W, Bilinear RPV CMSSM +X, τ ν τ : e(µ)+τ τ e+µ resonance lep + 7 j s + E T l l, l, L l eeν µ,eµν : 4 lep + E T,miss L L eeν : 4 lep + E µ,eµν T,miss g qqq : 3 jet resonance pair Scalar gluon : jet resonance pair WIMP interaction (D5, Dirac ) : monojet + E 3rd gen. sq. gluino med. 3rd gen. squarks direct production EW direct RPV Long lived particles MSUGRA/CMSSM : lep + j s + E T,miss MSUGRA/CMSSM : lep + j s + E T,miss Pheno model : lep + j s + E T,miss q = g mass q = g mass g mass q mass g mass ) < GeV, m( g mass g mass g mass g mass g mass g mass F scale ev) g mass g mass g mass g mass b b g mass mass mass )) t mass t mass t mass t mass t mass t mass mass mass ))) mass ), m( mass ), m( mass g mass t mass τ mass q mass ν ν mass (λ 3 =., λ 3 =.5) mass (λ =., λ =.5) 3 ()33 q = g mass mass > ) mass g mass sgluon mass (incl. limit from.693) M* scale (m < 8 GeV, limit of < 687 GeV for D8) Ldt = (. 3.) fb s ATLAS Preliminary = 7, 8 TeV 8 TeV results 7 TeV results *Only a selection of the available mass limits on new states or phenomena shown. All limits quoted are observed minus σ theoretical signal cross section uncertainty. Mass scale [TeV] Mass reach of ATLAS SUSY searches Updated for HCP Summary of ATLAS dedicated searches for stop production Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 37 / 4

38 Summary Plots: ATLAS New at HCP m g g production, g tt CL 95% C.L. limits. σ SUSY S not included. theory lepton, 3 b jets ATLAS CONF 45 3 leptons, 4 jets ATLAS CONF 5 lepton, 6 9 jets ATLAS CONF 3 [L =.8 fb, 8 TeV] int [L = 3. fb, 8 TeV] int [L = 5.8 fb, 8 TeV] int SS leptons, 4 jets [L = 5.8 fb, 8 TeV] ATLAS CONF 5 int Expected Observed Expected Observed Expected Observed Expected Observed 4 3 tt g forbidden ATLAS Preliminary m g Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 38 / 4

39 Summary Plots: CMS CMS preliminary x =.5 x =.5 m(mother) m(lsp) = GeV x =.75 m(lsp)= GeV T: g qq gluino Tbbbb: g bb gluino Ttttt: g tt gluino T: q q squark Tbb: b b sbottom Ttt: t t stop T3lh: g qq( l + l ) gluino T3w: g qq( W ) gluino T5lnu: l ν gluino T5zz: g qq( Z ) gluino Observed limits from several CMS SUSY searches plotted in the CMSSM (m,m/) plane TChiSlepSlep: lllν TChiwz: WZ chargino/neutralino chargino/neutralino 7 TeV, 4.98 fb Mass scales Range of excluded mass scale in Simplified Model Spectra from several CMS SUSY searches: best analysis result per topology see CMS SUS--6 for more detail Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 39 / 4

40 Conclusions ATLAS and CMS searches have left little room for SUSY in the reach of the existing data ATLAS and CMS have set bounds at the TeV-scale on gluino and squark production Reaching sensitivity to sub-femtobarn cross-sections and searches constrain squark and gluino masses uniformly in multiple model frameworks Plausible natural scenarios are still not ruled out: stop and/or RPV scenarios have few(er) constraints But allowed phase space is certainly getting squeezed Higgs-like boson discovered, but at high end of (MSSM) preference Need heavy squarks, large stop mixing or beyond MSSM This talk has illustrated a variety of results - covering all kinds of signatures Still no sign of SUSY... (but the full dataset is still to be analysed!) Sky French (Cambridge) UK HEP Forum Friday 3 rd November, 4 / 4