LHC Results and Future Prospects for BSM Searches Koji Terashi - PowerPoint PPT Presentation

March 5th, 2014 SCGT14Mini LHC Results and Future Prospects for BSM Searches Koji Terashi ICEPP, The University of Tokyo Outline ‣ Run I Results ‣ Prospects for Run II and beyond ‣ (Preliminary) look at one-family WTC model 1

SM Higgs (statistical) � Total uncertainty ATLAS Prelim. (syst.incl.theo.) � 1 on ± � µ m = 125.5 GeV H (theory) � + 0.23 Phys. Lett. B 726 (2013) 88 ATLAS-CONF-2013-108 H � � � - 0.22 + 0.24 - 0.18 + 0.33 = 1.55 µ 0.17 + - 0.28 - 0.12 Now we know + 0.35 Phys. Lett. B 726 (2013) 88 - 0.32 H ZZ* 4l � � + 0.20 ‣ Mass 125.5 ± 0.6 GeV (ATLAS) - 0.13 0.40 + = 1.43 µ + 0.17 0.35 - - 0.10 ‣ Confirmed γγ , WW, ZZ, ττ production + 0.20 Phys.Lett.B726(2013)88 H WW* l l - 0.21 � � � � + 0.23 ‣ VBF production in γγ , WW, ττ - 0.19 + 0.31 = 0.99 µ + 0.15 - 0.28 - 0.09 ‣ Yukawa coupling (indirectly by ggF, γγ ) + 0.13 Phys. Lett. B 726 (2013) 88 Combined - 0.14 H , ZZ*, WW* � � � + 0.17 ‣ Cross-section, spin, coupling all - 0.13 0.21 + = 1.33 µ + 0.12 - 0.18 - 0.10 consistent with SM predictions ATLAS-CONF-2013-079 0.5 ± ➡ SM(-like) Higgs strongly W,Z H b b � 0.4 ± + 0.7 = 0.2 µ preferred <0.1 - 0.6 + 0.3 ATLAS-CONF-2013-108 -1 H � � � - 0.3 (8TeV: 20.3 fb ) + 0.4 - 0.3 + 0.5 = 1.4 µ + 0.3 Next : Precision measurement - 0.4 - 0.2 -0.5 0 0.5 1 1.5 2 ‣ Confirmation of H → bb -1 � s = 7 TeV Ldt = 4.6-4.8 fb Signal strength ( ) µ ‣ Rare decay processes -1 � s = 8 TeV Ldt = 20.7/20.3 fb ... and search for additional ‣ Yukawa coupling (heavy) Higgses ‣ Self-coupling (two Higgs process) 2

Heavy Higgs Searches arXiv:1312.5353 CMS PAS HIG-13-021 CP-even/odd Higgs in MSSM SM-like Higgs H ➞ ZZ ➞ 4e/2e2 μ /4 μ Φ ➞ ττ ( bb Φ ➞ bb ττ ) - 4 leptons p T >20,10,7(5),7(5) GeV for e( μ ) - e τ h , μ τ h : p Te( μ ) > 24(20)GeV (2012) - 40<m Z1 <120 GeV, 12<m Z2 <120 GeV - e μ , μμ : p T1(2) > 20(10)GeV - τ h τ h : p T τ > 45GeV -1 -1 CMS s = 7 TeV, L = 5.1 fb ; s = 8 TeV, L = 19.7 fb SM - b-tag (p Tb-jet >20GeV) and no-btag 10 Observed σ / -1 -1 CMS Preliminary, H , 4.9 fb at 7 TeV, 19.7 fb at 8 TeV → τ τ σ Expected 60 β 95% C.L. limit on tan 95% CL Excluded: Expected 1 ± σ observed Expected 2 ± σ 50 expected ± 1 σ expected 1 2 expected ± σ 40 LEP 30 20 -1 10 10 100 200 300 400 1000 max MSSM m scenario h m (GeV) M = 1 TeV H SUSY 0 ➡ Excluded up to ~800 GeV as “SM Higgs” 200 400 600 800 1000 m [GeV] 3 A

except a few low-mass “gap” regions Excluded up to ~1.8 TeV (e.g, m stop ~ m top + m LSP ) for m LSP < 200 GeV Excluded up to 0.6-0.7 TeV SUSY Searches ATLAS-CONF-2013-047 Stop search summary Stop searches Squark/Gluino searches ~ ~ ~ ~ ~ ∼ 0 ∼ 0 ∼ 0 t t production, t → t χ / t → W b χ / t → c χ Status: SUSY 2013 Squark-gluino-neutralino model 1 1 1 1 1 1 1 1 2800 squark mass [GeV] [GeV] � 0 SUSY ATLAS Preliminary m( ) = 0 GeV Observed limit ( 1 ) � ± � ATLAS Preliminary -1 -1 theory L = 20 - 21 fb s =8 TeV L = 4.7 fb s =7 TeV 1 400 int int 2600 � 0 m( ) = 0 GeV Expected limit ( 1 ) � ± � exp ~ 1 ∼ 0 � -1 � 0L, t t 0 → χ 0L CONF-2013-024 0L [1208.1447] L dt = 20.3 fb , s =8 TeV m( � ) = 395 GeV Observed limit 0 1 1 1 ~ ∼ χ ∼ 0 1 2400 m 1L, t → t χ 1L CONF-2013-037 1L [1208.2590] � 0 1 ~ 1 m( � ) = 395 GeV Expected limit 350 ∼ 0 2L, t t → χ 0-lepton combined 2L CONF-2013-065 2L [1209.4186] 1 1 1 ~ � 0 ∼ 0 m( ) = 695 GeV Observed limit � 2L, t W b → χ 2200 2L CONF-2013-048 - 1 1 1 ~ ∼ 0 � 0 0L mono-jet/c-tag, t → c χ m( � ) = 695 GeV Expected limit 0L mono-jet/c-tag CONF-2013-068 - 1 1 300 1 -1 � CDF 2.6 fb [1203.4171] 0 2000 -1 7TeV (4.7fb ) m( � ) = 0 GeV Observed 1 Observed limits Expected limits All limits at 95% CL 1800 250 0 + m ∼ χ 1 0 m ∼ χ 1 + 1600 < m c 0 ∼ +m W χ 1 m 200 m g ~ m q + ~ < m m ~ t ~ t 1 m b 1400 < ~ m t 1 ~ m t 1 150 ∼ 0 1200 c χ 1 -1 L = 20.3 fb int 1000 100 800 800 1000 1200 1400 1600 1800 2000 2200 2400 50 -1 -1 ∼ 0 L = 4.7 fb L ≈ 21 fb W b χ int int gluino mass [GeV] 1 -1 L = 20 fb int 0 200 300 400 500 600 700 m [GeV] ~ t 1 ( m g ~ m q ) for m LSP < 700 GeV ~ ~ 4

Signature-based Searches Non-SUSY (aka “Exotics”) searches aim to cover as many final states/topologies as possible ADD ADD ADD RS1 Bulk RS Bulk RS New New Techni Techni New New UED UED color color Fermion Fermion Boson G s-ch t-ch G G g Di-jet ? Di-lepton/Di-photon ? Di-top ? Di-boson (W, Z) Jet(s) + E Tmiss Multi-jets Multi-leptons ? ? ? Same-sign di-lepton 5

Signature-based Searches Non-SUSY (aka “Exotics”) searches aim to cover as many final states/topologies as possible ADD ADD ADD RS1 Bulk RS Bulk RS New New Techni Techni New New UED UED color color Fermion Fermion Boson G s-ch t-ch G G g Di-jet ? Di-lepton/Di-photon ? Di-top ? Di-boson (W, Z) Jet(s) + E Tmiss Multi-jets Multi-leptons ? ? ? Same-sign di-lepton Present a few results on searches expected to be sensitive to heavy gauge bosons and technicolor and relevant interpretations 6

Dilepton ATLAS-CONF-2013-017 CMS PAS EXO-12-061 2 isolated leptons p Te( μ ) > 35(45) GeV at CMS, >40/30(25) GeV at ATLAS 6 10 Events / GeV -1 CMS Preliminary, 8 TeV, 19.6 fb 5 10 DATA 4 10 + - /Z e e γ → 3 10 t t , tW, WW, WZ, ZZ, τ τ jets (data) 2 10 10 1 ee+ μμ -1 10 channel -2 10 ee channel -3 10 -4 10 70 100 200 300 400 1000 2000 m(ee) [GeV] 6 10 Events / GeV -1 CMS Preliminary, 8 TeV, 20.6 fb 5 10 DATA ‣ Drell-Yan BG estimated by POWHEG (NLO) 4 10 + - /Z γ → µ µ 3 10 t t , tW, WW, WZ, ZZ, ‣ Total simulated background scaled to data at τ τ jets (data) 2 10 Z-peak (60<M ll <120 GeV) 10 R σ = � ( pp → Z � + X → �� + X ) 1 ‣ Limits set on -1 10 � ( pp → Z + X → �� + X ) -2 10 μμ channel Z’ SSM excluded up to 2.96 TeV (CMS) -3 10 -4 10 70 100 200 300 400 1000 2000 - + m( ) [GeV] µ µ 7

Dilepton Interpretation JHEP 1211, 138 (2012) Interpretation based on minimal ~ g 9 walking technicolor (F. Sannino ATLAS s = 7 TeV et al.) using 7 TeV results R , R ll → 8 1 2 ∫ ∫ -1 -1 ee: L dt = 4.9 fb : L dt = 5.0 fb µ µ Dilepton 95% Exclusion Minimum Walking Technicolor 7 Dilepton 95% Expected limit ‣ two techniflavors (U, D) Dilepton 95% Expected limit 1 ± σ Running regime ‣ satisfy precision EW measurements 6 EW precision test ‣ minimal TC states to exist: - light composite Higgs (~90-150 GeV) 5 - two axial-vector states R 1,2 ~ ‣ R 1,2 coupling constant = g 4 m H =200GeV 3 s = 0 q g g ` + 2 ˜ ˜ g g 500 1000 1500 2000 2500 R 0 1 , 2 M [GeV] A No significant improvement expected ~ at large g with 8 TeV data (large BG) ¯ q ~ ` − ➡ σ suppressed at large g 8

Diboson Sensitive to various V γ Process WW ZZ WZ VH HH BSM scenarios including Final qq+qq qq+qq qq+qq l ν +bb bb+bb l ν + γ EDs and technicolor State l ν +qq ll+qq l ν +qq ll+ γ ll+bb Wide variety of final ll+ νν νν +bb ll+qq states being covered qq+ νν l ν +ll qq+ νν Benchmark models used in ATLAS Bulk Randall-Sundrum G → WW, ZZ, HH (SM fields in the bulk) KK W/Z → WH/ZH K. Agashe et al. Sequential SM (+ EGM) SSM+EGM spin-1 W’ W’ → WZ, WH, Z’ → ZH G. Altarelli et al. - g W’WZ /g WWZSM = ( M W / M W’ ) 2 Minimal walking technicolor R 1,2 → WZ, WH, ZH F. Sannino et al. Low-scale technicolor ρ T /a T → WZ, W γ /Z γ , WW K. Lane et al. spin-2 bulk RS Graviton ➞ Dropped after 125 GeV Higgs discovery 9

Diboson (VV ➞ qqqq) CMS PAS EXO-12-024 Large BR beneficial Exploit jet substructure technique : ➡ QCD BG suppression is a key! ‣ Pruned jet mass : 70 < M jetPruned < 100 GeV ‣ N-subjettiness : τ 21 < 0.5 (tight) , 0.5-0.75 (medium) Baseline selection ‣ ≥ 2 C/A R=0.8 jets p T >30 GeV ⇒ Tight double-tag : ε SIGNAL ~10-20%, ε BG <0.1%!! ‣ | Δη jj | < 1.3, M jj > 890 GeV -1 CMS Preliminary, 19.8 fb , s = 8TeV /dm (pb/GeV) -1 10 High Purity Double W/Z-tag data Observed Fit Expected -2 WZ) (pb) 10 G ->WW 1 RS 1 Expected ± σ 2 Expected ± σ -3 10 -1 CMS Preliminary (19.8 fb ) W' WZ → s = 8 TeV σ | | < 2.5, | | < 1.3 -4 η Δ η 10 d -1 10 CA R=0.8 → G ->WW (1.5 TeV) RS -5 BR(X 10 -6 10 -2 10 × Data-Fit 2 1000 1200 1400 1600 1800 2000 2200 2400 σ Data 0 -2 σ 1000 1500 2000 2500 Dijet Mass (GeV) -3 10 1 1.2 1.4 1.6 1.8 2 For SSM+EGM W’ → WZ coupling Resonance mass (TeV) W’ SSM excluded up to 1.73 TeV 10