The Standard Model At CMS

Transcription

1 he Standard Model At CMS June 5, 5 () on behalf of the CMS collaboration

2 OULINE New physics CMS LHCb Hard QCD ALAS Vector bosons Higgs June 5, 5 top Heavy flavor ALICE

3 Challenges Huge integrated luminosity delivered by the LHC, over fb in at 8 ev recorded integrated lumi Reconstructed vertices In order to cope with the large rate, need to filter events by different triggers which select events of physics interest Reconstruction deals with multiple additional events per collisions (pile-up) June 5, 5 3

4 CMS Standard Model Summary plot σ [pb] Production Cross Section, Mar 5 CMS Preliminary 7 ev CMS measurement (L 5. fb ) 8 ev CMS measurement (L 9.6 fb ) 7 ev heory prediction 8 ev heory prediction CMS 95%CL limit Impressive agreement of theory and measurements June 5, 5 W Z Wγ Zγ WW WZ ZZ All results at: γγ WW EW qqll WVγ tt tt-ch tw ts-ch 4 ttγ ttz ggh VBF VH qqh h. Δσ H in exp. Δσ tth

5 LHC: start of Run II Event recorded on June 3 June 5, 5 5

6 LHC: start of Run II Restart of the LHC a few days ago at a center of mass energy of 3 ev Event recorded on June 3 Currently running with a 5 ns bunch spacing, plan to decrease the bunch spacing to 5 ns by late summer June 5, 5 6

7 QCD measurements June 5, 5 7

8 Signatures with Jets: Motivation Good understanding of jets crucial for many experimental signatures est perturbative QCD calculations and MC predictions over several orders of magnitude 9.7 fb (8 ev) Study parton distribution functions High precision measurements Very small background rates Small experimental uncertainty crucial (Jet energy scale) JEC uncertainty [%] CMS Preliminary R=.5 PFCHS η = jet otal uncertainty Excl. flavor, time Absolute scale Relative scale Pileup ( µ =) Jet flavor (QCD) ime stability Study extreme kinematic selections interesting for new physics with high precision p (GeV) Final state with jets (and leptons) major background for Higgs, SUSY, Exotica June 5, 5 8

9 Inclusive jet cross-section at 8 ev pb GeV/c σ dy d dp pp s = 8 ev CMS Preliminary open: L int filled: L int = 5.8 pb (low PU runs) =.7 fb (high PU runs) NNPDF. NLO NP June 5, < y <.5 ( ) 4.5 < y <. ( ) 3. < y <.5 ( ).5 < y <. ( ). < y <.5 ( ).5 < y < 3. ( ) 3. < y < 4.7 ( ) 3 4 Jet p [GeV/c] Inclusive jet p cross-section at 8 ev in 7 rapidity bins from to 5 GeV, over 5 orders of magnitude. Dedicated low pile-up runs for precise measurement at low p CMS-PAS-FSQ-3 9 CMS-PAS-SMP-

10 Inclusive jet cross-section at 8 ev Ratio to C pp s = 8 ev CMS Preliminary Data ABM HERAPDF.5 MSW8 NNPDF. Exp. Uncertainty < y <.5 Anti-k (R=.7) open: L int filled: L int = 5.8 pb =.7 fb (low PU runs) (high PU runs) Jet p (GeV/c) Compared to NLO predictions with several PDF sets, C works best for most bins June 5, 5 CMS-PAS-FSQ-3 CMS-PAS-SMP-

11 α S and PDF extraction using CMS data α S (Q) D inclusive jets D angular correlation H ZEUS CMS incl. jets : α S (M ) =.85 CMS R 3 CMS tt cross section CMS inclusive jets CMS 3-Jet mass Z Q (GeV) x g x, Q Extract α S as function of Q from CMS measurements Fract. uncert. CMS fb (7 ev) HERAPDF method Q 3.5 =.9 GeV HERA-I DIS CMS jets HERA-I DIS x x New extraction of gluon and quark PDFs with a significant improvement of the gluon PDF at high x June 5, 5 arxiv:4.6765

12 Dijet azimuthal decorrelation at 8 ev ) (rad dσ Dijet dδφ Dijet Dijet σ CMS Preliminary anti-k R =.7 p max > GeV (x ) max 9<p < GeV (x ) max 8 7<p <9 GeV (x ) max 6 5<p <7 GeV (x ) max 4 4<p <5 GeV (x ) max 3<p <4 GeV (x ) max <p <3 GeV (x ) heory C-NLO 9.7 fb (8 ev) heoretical uncertainties π /6 π /3 / π /3 π 5π/6 π Δφ (rad) Dijet heory: NLOJet as 3 jet production at α S 4 accuracy Δϕ Dijet Sensitive to higher order effects, p,j > GeV fixed, 7 bins in jet p Good agreement in a subrange, missing higher orders for low Δϕ Dijet values, points close to π excluded in theory treatment, would need merging of fixed-order and resummation June 5, 5 CMS-PAS-SMP4-5

13 Dijet azimuthal decorrelation at 8 ev ) (rad dσ Dijet dδφ Dijet Dijet σ CMS Preliminary June 5, 5 anti-k R =.7 max p > GeV (x ) max 9<p < GeV (x ) max 8 7<p <9 GeV (x ) max 6 5<p <7 GeV (x ) max 4 4<p <5 GeV (x ) max 3<p <4 GeV (x ) max <p <3 GeV (x ) π /6 π /3 / Pythia6 Z* Herwig Pythia8 4C π /3 9.7 fb (8 ev) MadGraph Pythia6 Z* Powheg Pythia6 Z* π 5π/6 π Δφ (rad) Dijet Compared to several MC generators dσ Dijet dδφ Dijet Dijet σ MC Data Good agreement only for MadGraph, need multi-leg calculation for good description CMS Preliminary max p π /6 π /3 / 9 < p Pythia6 Z* Herwig Pythia8 4C > GeV max < GeV π /6 π /3 π / π /3 π /6 π /3 π / π /3 π /6 π /3 π / π /3 π /6 π /3 π / π /3 π /6 π /3 / π /3 7 < p 5 < p 4 < p 3 < p < p < 3 GeV max max max max π /6 π /3 π / π/3 /6 /6 /6 /6 π π /3 5 π /6 π max Δφ /6 Δφ 5 π π Δφ (rad) Dijet < 9 GeV 5 π π Δφ (rad) Dijet < 7 GeV 5 π π Δφ (rad) Dijet < 5 GeV 5 π π Δφ (rad) Dijet < 4 GeV π π (rad) Dijet Exp. uncertainty MadGraph Pythia6 Z* Powheg Pythia6 Z* 9 < p max < GeV π /6 π /3 / 3 CMS-PAS-SMP fb (8 ev).5 max p > GeV π 5 π /6 π Δφ (rad) π /6 π /3 π / π/3 5π/6 π Dijet Δφ (rad) Dijet π /6 π /3 π / π/3 max 5π/6 π 7 < p < Δφ 9 GeV (rad) Dijet π /6 π /3 π / π/3 max 5π/6 π 5 < p < Δφ 7 GeV (rad) Dijet π /6 π /3 π / π/3 max 5π/6 π 4 < p < Δφ 5 GeV (rad) Dijet π /6 π /3 π / π/3 max 5π/6 π 3 < p < Δφ 4 GeV (rad) Dijet π /6 π /3 π / π/3 5π/6 π max < p < Δφ 3 GeV (rad) Dijet π /3 π 5π/6 π Δφ (rad) Dijet

14 Hard QCD and jets in a nutshell Inclusive jet cross-section in good agreement with NLO prediction over orders of magnitude heory predictions which can confront geometric measurements of inclusive dijets and very high multiplicities of desire à so far theory predictions for pure hadronic multijet signatures rarely trusted enough to be used in searches First global PDF fits on 7 ev show a sizable improvement especially for the gluon PDF many production processes at the LHC involve gluons More constrained PDF s lead to lower theory uncertainties on cross-section predictions First extraction of the strong coupling constant and testing of its running Good agreement with world average ( ) June 5, 5 4

15 Vector bosons June 5, 5 5

16 Vector Bosons W and Z an be measured very accurately through their leptonic decays, photon energies precisely measured in the electromagnetic calorimeter Z and photons used for calibration of jets, Z used as candle to determine lepton efficiencies Charge asymmetry distribution of W and W - provide input for u and d valence quark PDF s Vector boson plus jets major backgrounds in beyond standard model searches and excellent testing ground for QCD NLO predictions à data allows for large amount of precise measurements to tune MC predictions, June 5, 5 targeting better predictions in tails of important background processes for searches 6

17 W charge asymmetry Charge asymmetry.5. CMS preliminary, L = 8.8 fb at NLO FEWZ NLO PDF, 68% CL C NNPDF3 MMH4 HERAPDF5 s = 8 ev Events / GeV CMS preliminary, L = 8.8 fb at W µ ν, < η <. Data W µν QCD s = 8 ev DY µµ EW tt Charge asymmetry p µ > 5 GeV Data W charge asymmetry Muon η Data / MC..8 Data MC (stat) MC (stat sys) E (GeV) W signal yield determined through fitting the missing transverse energy. QCD templates constrained in control region inverting the isolation criteria on muons June 5, 5 CMS-PAS-SMP4-7

18 W charge asymmetry: PDF fits x u v.6 CMS Preliminary NLO 3 parameter fit Q = m W HERA I DIS CMS A W HERA I DIS x d v.3 CMS Preliminary NLO 3 parameter fit Q = m W HERA I DIS CMS A W HERA I DIS.4.. u quark. d quark Ratio.. Ratio (HERA I DIS CMS A W ) / (HERA I DIS) x.5 (HERA I DIS CMS A W ) / (HERA I DIS) x Extraction of valance u and d quark PDF: reducing the uncertainties by up to 5 % and sizable change of PDF s especially for d quark June 5, 5 CMS-PAS-SMP4-8

19 Vector Bosons plus Jets BlackHat/Data Sherpa k NNLO /Data MadGraph k NNLO /Data CMS Zjets PDF Sherpa Stat. Err. Scale MadGraph Stat. Err. June 5, fb (8 ev) [GeV] [GeV] BlackHat/Data MadGraph/Data γ p [GeV] CMS PDF MadGraph stat. error γ p [GeV] jets) [pb] N σ(w µν jet heory/data heory/data heory/data CMS W µν selection anti-k (R =.5) jets jet p > 3 GeV, η <.4 jet heory stat. syst. BlackHatSherpa ( to 5 jets NLO) heory stat. Sherpa, normalized to σ NNLO heory stat. s = 7 ev 5. fb Data BlackHatSherpa (NLO) Sherpa (LO) MadGraphPythia (LO) MadGraphPythia, normalized to σ NNLO VJets main backgrounds for searches with high missing transverse energy and measurements of VH with Hà bbar pz Z p 7 [GeV] 8 pz ] arxiv [fb GeV dσ/dp CMS p [GeV] Scale γ y <.4, n jets Data 9 Stat.syst. BlackHat(γjet) MadGraph 9.7 fb (8 ev) γ 9.7 fb Photonjets (8 ev) Wjets See alk by Eric akasugi Phys. Lett. B 74 (5) N jet

20 Z Bosons plus Jets [pb] dσ/dn jets CMS Preliminary 9.6 fb (8 ev) anti-k (R =.5) Jets jet jet p > 3 GeV, η <.4 Z/γ* ll channel Data Sherpa ( j@nlo 3,4j@LO PS) Madgraph Pythia6 ( 4j@LO PS) N jets dσ/dh (jets) [pb/gev] CMS Preliminary 9.6 fb (8 ev) anti-k (R =.5) Jets jet jet p > 3 GeV, η <.4 Z/γ* ll channel Data Sherpa ( j@nlo 3,4j@LO PS) Madgraph Pythia6 ( 4j@LO PS) H ) [pb/gev] (j dσ/dp CMS Preliminary 9.6 fb (8 ev) anti-k (R =.5) Jets jet jet p > 3 GeV, η <.4 Z/γ* ll channel Data Sherpa ( j@nlo 3,4j@LO PS) Madgraph Pythia6 ( 4j@LO PS) p jet Sherpa/Data MadGraph/Data Stat. unc. (gen) Stat. unc. (gen) = = = 3 = 4 = 5 = 6 = 7 N jets Sherpa/Data MadGraph/Data Stat. unc. (gen) H, N [GeV] jets H, N [GeV] jets Stat. unc. (gen) H, N [GeV] jets Very precise measurements of jets properties in Zjets First testing of Z & jet NLO matrix element PS generator Sherpa with 8 ev CMS Zjets data, performance on par with multileg LOPS generator MadGraph, up Sherpa/Data MadGraph/Data Stat. unc. (gen) p (j ) [GeV] p (j ) [GeV] Stat. unc. (gen) p (j ) [GeV] to % disagreement in leading jet p June 5, 5 CMS-PAS-SMP3-7 CMS-PAS-SMP4-9

21 Dibosons Diboson processes like ZZ and γγ major SM backgrounds for Higgs measurements WZ, ZZ and WW with one hadronically decaying vector boson V contribute to backgrounds in high precision measurements of Z and W jets Diboson measurements with multi-lepton signatures validate MC predictions for the decays of above WZ and ZZ with Zà νν major contribution to backgrounds in searches with large missing transverse energy (e.g. SUSY) Precise Measurements of dilepton p ll of leading Z candidate in 4 lepton events testing ground for validity of MC predictions of ZZ backgrounds June 5, 5

22 Diboson inclusive cross-section overview Mar. 5 CMS Preliminary June 5, 5 CMS measurements vs. NLO (NNLO) theory 7 ev CMS measurement (stat,statsys) 8 ev CMS measurement (stat,statsys) γ γ, (NNLO th.).6 ±. ±. W γ.6 ±.3 ±.3 Z γ.98 ±. ±.5 Z γ.98 ±. ±.5 WWWZ.5 ±.3 ±.5 WW. ±.4 ±. WW, (NNLO th.). ±. ±.8 5. fb 5. fb 5. fb 9.5 fb 4.9 fb 4.9 fb 9.4 fb WZ.7 ±.7 ± fb WZ. ±.3 ± fb ZZ.99 ±.4 ± fb ZZ. ±.6 ± fb.5 All results at: Production Cross Section.5 Ratio: σ exp / σ theo Several diboson processes are major backgrounds for searches and SM Higgs In general good agreement between CMS inclusive cross-section measurements and SM (N)NLO prediction confront predictions with differential cross-sections

23 Diboson differential cross-sections ll σ dσ(ww jets)/dp heory / Data heory / Data heory / Data June 5, CMS Preliminary 9.4 fb (8 ev) WW p ll Data Madgraph MC@NLO Powheg MadgraphPythia normalized to σ NNLO MC@NLOHerwig normalized to σ NNLO PowhegPythia normalized to σ NNLO ll p (GeV) WW dilepton spectrum reproduced by MadGraph, Powheg & MC@NLO prediction shifted to lower values ZZ leading lepton p in data agrees with predictions from MCFM & MadGraph CMS-PAS-SMP4-6 ) (/GeV) d σ fid /d(ld. lep. p /σ fid Data/MC CMS s = 8 ev, L = 9.6 fb Unfolded data otal uncertainty ZZ MCFM NLO ZZ Leading lepton p (GeV) Phys. Lett. B 74 (5) 5

24 Vector Bosons Inclusive single boson and diboson cross-section measurements are predicted accurately by state of art theory calculations First extractions of PDFs using Vector boson measurements at CMS Differential distributions in general predicted by MC multileg LO MEPS in high statistics regions, sizable deviations in tails of distributions Accuracy of Diboson measurements start to be limited by systematics June 5, 5 4

25 Rare decays June 5, 5 5

26 B S à µ µ - and B à µ µ - Standard model predicts a very tiny branching fraction of B S à µ µ - and B S à µ µ - d B s! µ µ B s b W Z µ e B s! µ µ t Bs t W s µ s W µ Direct flavor-changing neutral currents not possible in SM, theories beyond standard model can lead to a large increase of this decay mode b W µ f B s! µ µ B s b s t X X W µ µ g B s! µ µ B s b X t s W µ µ June 5, 5 Nature 5 (5) 68 6

27 First observation: B S à µ µ - (CMS & LHCb) S/(SB) weighted cand. / (4 MeV/c ) 6 Data Signal and background 5 Bs µ µ B µ µ Combinatorial bkg. 4 Semileptonic bkg. Peaking bkg. 3 CMS and LHCb (LHC run I) June 5, m µ µ [MeV/c ] Weighted distribution of Dimuon mass-spectrum, superimposed in a combined fit the B S à µ µ - and B S à µ µ - components first observation of B S à µ µ - decay and evidence for B à µ µ - decay Nature 5 (5) 68

28 Combined result B S à µ µ - : (CMS & LHCb) ] 9 ) [ CMS and LHCb (LHC run I).9.8 lnl 4 3 SM µ µ B(B SM B(B µ µ ) [ ] Likelihood in B S à µ µ - vs B S à µ µ - branching plane 68.7% 95.45% 99.73% s 7 a 9 lnl B(B µ µ ) [ SM B(B µ µ ) [ s b c 9 ] 9 ] Branching B S à µ µ - : ( ) x -9 Branching B à µ µ - : ( ) x - ( x SM) ( x SM) June 5, 5 Nature 5 (5) 68 8

29 op physics June 5, 5 9

30 top mass measurements 9.7 fb (8 ev) 5. fb (7 ev) op is the heaviest quark in the SM: CMS Preliminary CMS, dilepton JHEP 7 () 49, 36 pb CMS, leptonjets PAS OP--9, 36 pb CMS, dilepton EPJC 7 (), 5. fb CMS, leptonjets JHEP () 5, 5. fb 75.5 ± 4.6 ± 4.6 GeV (value ± stat ± syst) 73. ±. ±.6 GeV (value ± stat ± syst) 7.5 ±.4 ±.4 GeV (value ± stat ± syst) 73.5 ±.4 ±. GeV (value ± stat ± syst) decays into Wb jet Combined top mass using all CMS Run I measurements at 7 and 8 ev: CMS, all-hadronic EPJ C74 (4) 758, 3.5 fb 73.5 ±.7 ±. GeV (value ± stat ± syst) 5 CMS, leptonjets PAS OP4-, 9.7 fb CMS, all-hadronic PAS OP4-, 8. fb CMS, dilepton PAS OP4-, 9.7 fb CMS combination September 4 evatron combination July 4 arxiv:47.68 World combination March 4 ALAS, CDF, CMS, D 7. ±. ±.7 GeV (value ± stat ± syst) 7. ±.3 ±.8 GeV (value ± stat ± syst) 7.5 ±. ±.4 GeV (value ± stat ± syst) 7.38 ±. ±.65 GeV (value ± stat ± syst) ±.37 ±.5 GeV (value ± stat ± syst) ±.7 ±.7 GeV (value ± stat ± syst) m t [GeV] Previous result combining results from ALAS, CDF, CMS, D: 73.34±.7(stat)±.7(syst) GeV June 5, 5 OP4-5 3

31 ttbar pair production cross-section at 8 ev ALASCMS Preliminary σ tt summary, NNLONNLL (op.), PDF4LHC evatronlhc m top = GeV scale uncertainty scale PDF α S uncertainty s = 8 ev stat. uncertainty total uncertainty σ ±(stat) ±(syst) ±(lumi) tt Combined ALAS & CMS cross-section at 8 ev using dilepton measurements in eµ final state 4±.4(stat)±5.7(syst) ±6.(lumi) pb ALAS, dilepton eµ arxiv: , L =.3 fb int CMS, dilepton eµ JHEP (4) 4, L =5.3 fb int LHC combined eµ (Sep 4) CMS-PAS OP4-6, ALAS-CONF-4-54, L int = fb 4.8 ±.7 ± 5.5 ± 7.5 pb 37. ±.6 ±.9 ± 6. pb 4.6 ±.4 ± 5.7 ± 6. pb ttbar pair production background for many searches Important to study many properties of ttbar events Effect of LHC beam energy uncertainty: 4. pb (not included in the figure) June 5, 5 σ tt [pb] OP4-6 3

32 ttbar differential measurements MC generators predict harder dilepton mass spectrum than observed in data. he lepton spectrum in data is softer than predicted by most MCs, PowhegHerwig6 provide a satisfactory agreement GeV - l l dσ dm σ heory Data June 5, 5 Dilepton CMS, 9.7 fb at s = 8 ev Data MadGraphPythia6 MC@NLOHerwig6 PowhegPythia6 PowhegHerwig6 5Stat Stat. Syst. m - l l GeV m - l l arxiv GeV GeV 3 * dσ dp t σ heory Data 9 8 e/µ Jets CMS, 9.7 fb at s = 8 ev Data MadGraphPythia6 MC@NLOHerwig6 PowhegPythia6 PowhegHerwig6.6 5Stat Stat. Syst. t p * GeV p t * GeV

33 ttbar: 8 ev data/mc ratios Compare unfolded results between data and different MCs: baseline MadGraph Pythia6 t Ratio dσ dp σ CMS, 9.7 fb at Data or theory / MadGraphPythia6 e/µ Jets Dilepton s = 8 ev Ratio dσ dy σ tt CMS, 9.7 fb at Data or theory / MadGraphPythia6 e/µ Jets Dilepton s = 8 ev PowhegPythia6 PowhegHerwig6 MC@NLOHerwig p t [GeV].8.6 PowhegPythia6 PowhegHerwig6 MC@NLOHerwig y tt Prediction of PowhegHerwig6 shows best agreement with data for most distributions, measurements input for future MC tuning June 5, 5 arxiv

34 ttbar: 7 ev vs 8 ev Compare unfolded results between both center of mass energies: Ratio t dσ dp σ Large improvement in uncertainties of 8 ev result CMS, 5./9.7 fb at Data or theory / MadGraphPythia6 e/µ Jets (8 ev) e/µ Jets (7 ev) Dilepton (8 ev) Dilepton (7 ev) s = 7/8 ev Ratio dσ dy σ tt CMS, 5./9.7 fb at Data or theory / MadGraphPythia6 e/µ Jets (8 ev) e/µ Jets (7 ev) Dilepton (8 ev) Dilepton (7 ev) s = 7/8 ev t p [GeV] y tt Results at different energies show same trends in the data/(madgraphpythia6) ratio June 5, 5 arxiv

35 bar ttbar mass measurement combining all CMS data Several unfolded differential measurements in ttbar eµ final state Dilepton p ll, M ll, hardest b-jet p, jet multiplicity Best agreement of PowhegHerwig6 and data, other generators predict harder spectrum than observed in data ttbar significant background both for SM precision measurement in Z and WJets final state and beyond the standard model searches in multijet and missing transverse energy final states June 5, 5 35

36 Higgs physics June 5, 5 36

37 Higgs mass measurements at CMS Higgs mass measured combining 7 and 8 ev data in diphoton and ZZà 4l decay modes Events / GeV CMS H γγ 9.7 fb (8 ev) 5. fb (7 ev) Sum over all classes Data SB fits (sum) B component ±σ ±σ Events / 3 GeV CMS Data m H =6 GeV Zγ*,ZZ ZX s = 7 ev, L = 5. fb ; s = 8 ev, L = 9.7 fb 4 5 Events / GeV -.6 µ =.4.3 m H = 4.7 ±.34 GeV B component subtracted m γγ (GeV) m 4l 8 (GeV) Clear excess of Higgs signal in four lepton mass and steeply falling smooth diphoton mass spectrum June 5, 5 Eur. Phys. J. C 74 (4) 37 Phys. Rev. D 89 (4)

38 Higgs mass Run I combination of ALAS & CMS Combination uses Run I Higgs mass measurements from ALAS and CMS in Hà ZZà 4l and Hà γγ final states: 5.9±.4 (±.[stat]±.[syst]) GeV ALAS and CMS Run June 5, 5 otal Stat. Syst. LHC otal Stat. Syst. ALAS H γ γ 6. ±.5 ( ±.43 ±.7) GeV CMS H γ γ 4.7 ±.34 ( ±.3 ±.5) GeV ALAS H ZZ 4l 4.5 ±.5 ( ±.5 ±.4) GeV CMS H ZZ 4l 5.59 ±.45 ( ±.4 ±.7) GeV ALAS CMS γ γ 5.7 ±.9 ( ±.5 ±.4) GeV ALAS CMS 4l 5.5 ±.4 ( ±.37 ±.5) GeV ALAS CMS γ γ 4l 5.9 ±.4 ( ±. ±.) GeV m H [GeV] Phys.Rev.Lett. 4 (5)

39 Higgs cross section and signal strength Combined µ =. ±.4 H γγ tagged µ =. ±.4 H ZZ tagged µ =. ±.9 H WW tagged µ =.83 ±. 9.7 fb (8 ev) 5. fb (7 ev) CMS p SM =.96 m H = 5 GeV µ VBF,VH 6 4 CMS 9.7 fb (8 ev) 5. fb (7 ev) H γγ tagged H ZZ tagged H WW tagged H ττ tagged H bb tagged SM Higgs H ττ tagged µ =.9 ±.8 H bb tagged µ =.84 ±.44 June 5, Best fit σ/σ SM Combined cross section signal strength modifier µ=.±.4 consistent with SM arxiv: µ ggh,tth Signal strength of production mechanism compatible with SM (ratio=) for both production mechanisms µ VBF,VH /µ ggh,tth =

40 Higgs couplings κ f.5 CMS 9.7 fb (8 ev) 5. fb (7 ev) Observed SM Higgs H WW H γγ Extracted fermion coupling and vector boson couplings compatible with SM, extract possible coupling modifiers κ f and κ V κ f = H ZZ 95% C.L. H ττ H bb κ V = Colored region represents 68 % confidence levels.5.5 June 5, 5 arxiv:4.866 κ V 4

41 he Higgs Well established signal of a scalar boson at a mass of 5 GeV Cross-section of various channels are in agreement with Standard Model Higgs hypothesis Performed first measurements of couplings: compatible with Standard Model couplings Spin-parity measurements and limit on Higgs width are consistent with the SM prediction June 5, 5 4

42 Searches: SUSY June 5, 5 4

43 SUSY searches snapshot SUSY one of the most popular beyond the standard model theories Solves the hierarchy problem Provides a suitable dark matter candidate SUSY corrections allow for high energy unification of strong and electroweak couplings June 5, 5 RPV slepton EWK gauginos sbottom stop squark gluino production g b( b t t b( t b ( t t ± lll ν - - l l ν ν Z Z ± W Z H Z ± H W ± llτ ν ± τττ ν g t( t g qq( t( ( t ( t g qq g bb ± W ± b b g tt q q b l g qllν λ g qllν λ g qllν λ 3 33 g qbtµ t W t t W ) H G) b tw bz ) Z ) H l λ ' 3 g qbtµ λ ' g qqb λ '' 33 3/3 g qqq λ '' g tbs λ '' 33 g qqqq λ '' q qllν λ q qllν λ 3 q qllν λ 33 q qbtµ λ ' 3 q qbtµ λ ' q qqqq λ '' 33 R t µ e ν t λ R t µ τν t λ R 3 t µ τν t λ R 33 t tbtµ λ ' R 33 t t ) )) ) Summary of CMS SUSY Results* in SMS framework m(mother)-m(lsp)= GeV SUS 3-9 L=9.5 /fb SUS4- SUS3-9 L= /fb SUS3-7 SUS3-3 L= /fb SUS3-8 SUS3-3 L=9.5 /fb SUS3-3 L=9.5 /fb SUS3-8 SUS3-3 L=9.5 /fb SUS3-9 L=9.5 /fb SUS4- L=9.5 /fb SUS3- L=9.5 /fb SUS3-4 L=9.5 /fb SUS3-4 SUS3-4 L=9.5 /fb SUS3-4 SUS3-4 L=9.5 /fb SUS3-8 L=9.4 /fb SUS3-8 SUS3-3 L=9.5 /fb SUS3-8 L=9.5 /fb SUS3-6 L=9.5 /fb SUS3-6 L=9.5 /fb SUS4- L=9.5 /fb SUS3-6 L=9.5 /fb SUS4- L=9.5 /fb SUS4- L=9.5 /fb SUS3-6 L=9.5 /fb SUS3-6 L=9.5 /fb SUS3-6 L=9.5 /fb SUS-7 L=9. /fb SUS-7 L=9. /fb SUS-7 L=9. /fb SUS-7 L=9. /fb SUS-7 L=9. /fb EXO-49 L=9.5 /fb EXO-49 L=9.5 /fb SUS3-3 L=9.5 /fb SUS-7 L=9. /fb SUS-7 L=9. /fb SUS-7 L=9. /fb SUS-7 L=9. /fb SUS-7 L=9. /fb SUS-7 L=9. /fb SUS-7 L=9. /fb SUS3-3 L= /fb SUS-7 L=9. /fb SUS3-3 L= /fb SUS3-3 L=9.5 /fb x =.5 x =.5 x =.75 x =.95 x =.5 x =.5 x =.95 x =.5 x = *Observed limits, theory uncertainties not included Mass scales [GeV] Only a selection of available mass limits Probe *up to* the quoted mass limit x =. x =.5 ICHEP 4 m(lsp)= GeV CMS Preliminary For decays with intermediate mass, = x m (-x) m Searches involve typically the presence of large missing transverse energy and multijets 43 m intermediate mother lsp

44 SUSY searches: fully hadronic Example: search in fully hadronic signature using the generalized transverse mass M. Main background for SUSY events Zà νν Understanding of Zà νν using Zà ll events or photon plus jets events Events / 5 GeV CMS Medium H MC vs data 9.5 fb (8 ev) Multijet Wjets Zjets op quark Other Data M [GeV] Events CMS N j =, N = b Medium H 9.5 fb (8 ev) Multijet Lost lepton Z(νν)jets Data Use data-driven background methods in final result M [GeV] June 5, 5 JHEP 5 (5) 78 44

45 SUSY searches: single lepton stop Stop search one important model, better understanding of rare backgrounds needed, composed by ttz,ttw, ttγ and tribosons (WWW, WWZ, ZZW, ZZZ) and tw Data/MC.5.5 CMS s = 8 ev, Ldt = 9.5 fb Data/MC.5.5 CMS s = 8 ev, Ldt = 9.5 fb Entries / 5 GeV Preselection Data l top tt ll Wjets rare t t (65/5) x Entries / 3 GeV Preselection Data l top tt ll Wjets rare ± t b (65/5/.5) x t t (5/) x [GeV] miss E p (b ) [GeV] June 5, 5 45 EPJC 73 (3) 677

46 Searches So far no significant excess observed in any of the searches performed by CMS in SUSY and other beyond the standard phenomena (e.g. Z, b, extra dimensions, general dark matter searches) Exclusion limits in set in D mass planes of simplified models, e.g. combination of all -3 lepton result at 8 ev: CMS 9.5 fb (8 ev) Upper limits on cross-section in June 5, 5 neutralino-gluino mass plane PLB 745 (5) 5 46 [GeV] m 5 pp g g, g t t Observed ± Expected ± NLONLL exclusion σ theory σ experiment m g [GeV] 95% CL upper limit on cross section (fb)

47 Summary Only a handful of results out of the rich long list of measurements performed by CMS Run I data analysis still going on, so far 439 papers submitted for publication.and counting All list of past and recent results can be found at à In general predictions provide a good description of data Results provide valuable input for theory e.g. updated PDF sets, couplings and masses Differential measurements more challenging for predictions Ready to test new generators of multileg NLO MEPS type Measurements of properties in Higgs sector compatible with SM Higgs Looking forward to analyze RunII data which just started a few days ago With new data around the corner more exciting times to come June 5, 5 47

48 BACKUP June 5, 5 48

49 WW Good agreement between simulated MC and data June 5, 5 CMS-PAS-SMP4-6 49

50 ZZ PowhegPythia provides a better prediction of data than MCFM for angular variables June 5, 5 Phys. Lett. B 74 (5) 5 5

51 top mass measurement in dilepton channel Events CMS Preliminary Data tt Drell Yan Single op WJets Multi-bosons Uncertainty Peak mass 9.7 fb (8 ev) ) -log (L/L max CMS Preliminary 9.7 fb (8 ev) June 5, 5 AMW mass [GeV] OP4- op mass is extracted from a likelihood fit of the peak mass distribution in data to distributions from MC templates. MC: MadGraph5Pythia6 with MadSpin used in the decay of the top op quark mass [GeV]

52 ttbar differential cross sections Leptons / GeV 3 35 e/µ Jets CMS, 9.7 fb at Data tt Signal tt Other Single t WJets s = 8 ev Z / γ * Jets ttz/w/γ Diboson Uncertainty Events Dilepton CMS, 9.7 fb at Data tt Signal tt Other Single t WJets s = 8 ev Z / γ* ee/µµ Z / γ* τ τ ttz/w/γ Diboson Uncertainty 5 N MC N Data [GeV] Good agreement between MadGraph and data over a large range p l N Data N MC N jets June 5, 5 arxiv

53 Helicity Angle θ l * Measured in single top events with a decay of exactly one lepton and exactly two jets, containing one associated with a b-quark Helicity Angle θ l defined as angle between W momentum in top rest frame and momentum of the down-type decay fermion in the rest frame of the W Events / CMS 9.7 fb (8 ev) Data Wjets t (t-chan.) Others µjets t (other) tt QCD Stat. unc. June 5, JHEP (5) 53 cos(θ * 53

54 W boson helicity (Single op decays).35 CMS 9.7 fb (8 ev).3 F L.5. Data, Stat. unc. Syst. unc. otal unc. SM pred. (PRD 8 ()) F W helicity measurements compatible with SM expectation June 5, 5 JHEP (5) 53 54

55 - Constraints on Higgs spin-parity Pseudoexperiments CMS 9.7 fb (8 ev) 5. fb (7 ev) qq X( ) ZZ Observed / L ) P - ln(l J CMS H ZZ Observed Expected ± σ J P ± σ ± σ P J ± σ ± 3σ J P ± 3σ 9.7 fb (8 ev) 5. fb (7 ev) ln(l P J / L ) Exotic spin-one study with Hà ZZà 4l -6 m h h3 h b h6 h7 - h - h9 h m h h3 h b h6 gg production qq production h7 - h - h9 h m h h3 h b h6 h7 h h9 decay-only discriminants est statistics for spin two JP models against SM Higgs boson hypothesis h Mixed one spin states and a list of spin two models excluded excluded in WW and ZZ modes, all observations compatible with SM Higgs J[PC]=[] June 5, 5 arxiv:

56 Constraints on Higgs Width gluon fusion production cross-section in small region around m H and above m ZZ > m Z Events / GeV CMS 9.7 fb (8 ev) 5. fb (7 ev) Events / 3 GeV Data ggvv ZZ qq ZZ ZX kin D bkg > m 4l (GeV) Events / bin CMS 9.7 fb (8 ev) 5. fb (7 ev) Data SM All contributions (Γ H = Γ H, µ = ) SM ggvv ZZ (Γ = Γ, µ = ) H H qq ZZ ZX >.65 MELA D gg Events / bin 3 CMS 9.7 fb (8 ev) Data SM All contributions (Γ H = Γ H, µ SM ggvv ZZ (Γ = Γ, µ = ) H H qq ZZ Zjets top/wjets/ww WZ = ) m 4l (GeV) m 4l (GeV) m (GeV) Simultaneous maximum likelihood fit to kinematic distributions near resonance peak and above Z-boson pair production threshold upper limit on the Higgs boson width Γ[H] < MeV at a 95% confidence level June 5, 5 56 Phys. Lett. B 736 (4) 64