Higgs Boson Measurements from ATLAS and CMS. Giacinto Piacquadio on behalf of the ATLAS and CMS Collaborations. ICHEP Seoul July 10th, 2018

Size: px

Start display at page:

Download "Higgs Boson Measurements from ATLAS and CMS. Giacinto Piacquadio on behalf of the ATLAS and CMS Collaborations. ICHEP Seoul July 10th, 2018"

Diana Rogers
5 years ago
Views:

1 Higgs Boson Measurements from ATLAS and CMS Giacinto Piacquadio on behalf of the ATLAS and CMS Collaborations ICHEP Seoul July th,

2 The Higgs boson in the SM The Higgs boson discovery in 2012 Opened the way to the exploration of the sector of the SM Lagrangian that is responsible for EW symmetry breaking! 2 Giacinto Piacquadio - ICHEP 2018

The Higgs boson in the SM The Higgs boson discovery in 2012 Opened the way to the exploration of the sector of the SM Lagrangian that is responsible for EW symmetry breaking!

3 The Higgs boson in the SM The Higgs boson discovery in 2012 Opened the way to the exploration of the sector of the SM Lagrangian that is responsible for EW symmetry breaking! Two types of tree-level couplings to other SM particles, which determine all Higgs Boson production and decay modes to Fermions to Bosons 3 Giacinto Piacquadio - ICHEP 2018

4 The LHC Run-1 legacy Higgs boson mass measured to ~0.2% (fixes the SM predictions!) Higgs boson couplings measured to ~-25% precision H invisible constrained to < 25-30% First studies of spin, CP eigenstate/admixtures, differential distributions, all compatible with the SM 4 Giacinto Piacquadio - ICHEP 2018

5 Is this good enough? No! Coupling to fermions not fully established yet in Run-1 (coupling to top and bottom quarks not directly observed) Generic size of (inclusive) Higgs couplings modifiers expected for new physics (BSM) at ~O(TeV): [Snowmass 2013 study, BSM effects may be enhanced at high transverse momentum, in tails of distribution [Grazzini et al., JHEP 1703, 115 (2017)] Great progress! Will show some of the highlights from ATLAS and CMS based on 36 or 80 fb -1 of Run-2 data (up to 3x the Run-1 luminosity) NEW result released for ICHEP! 5 Giacinto Piacquadio - ICHEP 2018

8x pp th (NLO QCD, t-ch + s-ch) LHC HIGGS XS WG 2016 Production modes Higgs bosons produced in Run 2 (2015-2017) ~4M ~300k 2 6 7 8 9 11 12 13

6 Higgs boson production at the LHC σ(pp H+X) [pb] 2 M(H)= 125 GeV 1 1 pp H (N3LO QCD + NLO EW) pp qqh (NNLO QCD + NLO EW) pp WH (NNLO QCD + NLO EW) pp ZH (NNLO QCD + NLO EW) pp tth (NLO QCD + NLO EW) [LHC Higgs X-sec WG] 2.3x pp bbh (NNLO QCD in 5FS, NLO QCD in 4FS) 3.8x pp th (NLO QCD, t-ch + s-ch) LHC HIGGS XS WG 2016 Production modes Higgs bosons produced in Run 2 ( ) ~4M ~300k s [TeV] ~200k Significant increase in production rate due to higher center-of-mass energy from LHC Run-1 to Run-2! 6 Giacinto Piacquadio - ICHEP 2018 ~40k

Higgs boson decay modes ZZ, γγ: high mass resolution channels mass and

access to coupling to 2nd generation fermions µµ 0.02% tt 6.3% WW* 21.4% 1.

7 Higgs boson decay modes ZZ, γγ: high mass resolution channels mass and precise differential measurements ZZ* gg 8.2% gg 0.23% Zg 0.15% 0.008% (e,µ) 2.6% 0.012% (e,µ) WW: High BR, but low mass resolution μμ: very small BR, but access to coupling to 2nd generation fermions µµ 0.02% tt 6.3% WW* 21.4% 1.1% (e,µ) cc 2.9% bb 58.2% bb, ττ: high BR, but low S/B, important to directly probe Higgs boson coupling to fermions 7 Giacinto Piacquadio - ICHEP 2018

8 W. Leight N. Wardle Mass measurement New mass measurements based on H γγ and H ZZ* 4l final states. ATLAS H γγ ATLAS H ZZ* 4l CMS H ZZ* 4l [arxiv: ] m H = ± 0.40 GeV 8 Giacinto Piacquadio - ICHEP 2018 m H = ± 0.37 GeV ± 0.27 GeV m H = ± 0.24 GeV [JHEP11(2017)047] m H = ± 0.21 GeV Run-2 CMS ZZ* alone 1.7 per-mille precision, ATLAS 2.1 per-mille in combination ATLAS + CMS Run-1: (stat. limited) (1.9 per-mille) (stat. limited)

[HIGG-2017-06] Higgs boson width SM Higgs boson width (4 MeV) too small to be measured directly. Best direct limit from CMS H ZZ* 4l ( H < 1.

9 [HIGG ] Higgs boson width SM Higgs boson width (4 MeV) too small to be measured directly. Best direct limit from CMS H ZZ* 4l ( H < 1. 95% CL) Or can measure the ratio of on-shell to off-shell cross section in H ZZ*/WW* o shell / apple 2 g,o shell apple 2 Z,o shell on shell / apple2 g,on shell apple2 Z,on shell H/ SM H ATLAS Run-2 measurement of off-shell cross-section for H ZZ* 4l / 2l 2ν 220 <m4` < 2000 GeV 9 Giacinto Piacquadio - ICHEP 2018 NEW µ o shell = o o shell shell,sm < 3.8 (3.4exp.) Assumption: apple o shell = apple on shell H < 14.4 MeV (15.2 MeV exp.) Uses NLO K factors for gg (H* ) ZZ* as function of m(zz) [Caola et al, Phys. Rev. D 92 (2015) 18] Improves on Run-1 ATLAS and CMS expected limits by almost factor 2

10 L. Mijovic V. Tavolaro Precise differential measurements [ATLAS-CONF ] NEW New ATLAS H γγ measurement with 80 fb-1 of Run-2 data. New CMS combined measurement of H γγ, H ZZ and H bb with 36 fb -1 of Run-2. [CMS-PAS-HIG ] NEW Unprecedented precision on Higgs p T spectrum Good agreement with predictions. No sign of New Physics in p T(H) tail yet! Giacinto Piacquadio - ICHEP 2018

11 E. Scott O. Kortner T. Sculac Precise differential measurements H γγ (36 fb -1 ) H γγ (80 fb -1 ) H γγ + ZZ (36 fb -1 ) [CMS-HIG ] NEW NEW Many many new differential distributions measured. All distributions in agreement with expectations. 11 Giacinto Piacquadio - ICHEP 2018 NEW

12 Higgs boson coupling to fermions Indirect probe (through loop diagrams) t,b t,b t,b + + gg! H H! Direct probe (tree-level diagrams) Leptons Down-type quarks Up-type quarks 3rd gen. H! H! b b t th 2nd gen. H! µµ H! c c 12 Giacinto Piacquadio - ICHEP 2018

13 Higgs boson coupling to fermions Indirect probe (through loop diagrams) t,b t,b t,b + + gg! H H! Direct probe (tree-level diagrams) Leptons Down-type quarks Up-type quarks 3rd gen. H! H! b b t th 2nd gen. H! µµ H! c c 13 Giacinto Piacquadio - ICHEP 2018

14 P. Bortignon Y. Enari H bb Not yet In addition to probing coupling to b-quarks: H bb drives the uncertainty on the total decay width, and thus on measurement of absolute couplings it also drives the indirect limit on undetected/invisible decays 2012 CDF+DZero Evidence [Phys. Rev. Lett. 9 (2012) ] 2.8σ (1.5σ exp.) [3.1σ global] 2017 Evidence by both ATLAS and CMS 4.0σ (3.6σ exp.) 3.8σ (3.8σ exp.) [JHEP 12 (2017) 024] [Phys. Lett. B 780 (2018) 501] 14 Giacinto Piacquadio - ICHEP 2018

15 Y. Enari 0-lepton VH, H bb VH production most sensitive mode for H bb at the LHC 3 channels (0-, 1-, 2 charged leptons from V= W/Z boson) Select 2 b-tagged jets and pt(v) > 75 or 150 GeV Main discriminant variables m(bb), p T(V) and ΔR(bb) (combined into a Boosted Decision Tree) 1-lepton 2-lepton 15 Giacinto Piacquadio - ICHEP 2018 Events / 20 GeV Data/Pred ATLAS Preliminary -1 s = 13 TeV, 79.8 fb 0 lepton, 2 jets, 2 b-tags V p T 150 GeV m(bb) Data VH Vbb (µ=1.16) Diboson tt Single top W Z Uncertainty Pre-fit background SM VH Vbb 5 NEW m bb [GeV] Non-resonant backgrounds: ttbar, single top (NLO, PowHeg) W+jets Z+jets (NLO for up to 2 extra jets, Sherpa 2.2.1) Overall strategy: normalization from data, shapes from MC

16 Run-2 VH, H bb results Events / [ATLAS-CONF ] ATLAS Preliminary -1 s = 13 TeV, 79.8 fb leptons 2+3 jets, 2 b-tags Data VH Vbb (µ=1.16) Diboson tt Single top Multijet Z W NEW Fit result with 79.8 fb -1 of Run-2 data µ = meas / SM = Significance: 4.9σ (4.3σ expected) Combination with Run-1: 0.25 µ =0.98 ± 0.14(stat.) (syst.) Significance: 4.9σ (5.1σ expected) Pull (stat.) log (S/B) Detailed validation of analysis: Fit to diboson VZ, Z bb: m(bb) fit for VH, H bb: (3.6σ) 16 Giacinto Piacquadio - ICHEP 2018 µ = µ = (9.6σ) Events / GeV (Weighted, backgr. sub.) ATLAS Preliminary -1 s = 13 TeV, 79.8 fb leptons 2+3 jets, 2 b-tags Weighted by Higgs S/B Data VH Vbb (µ=1.06) Diboson Uncertainty Dijet mass analysis NEW m bb [GeV]

17 [ATLAS-CONF ] H bb combination NEW Run-1+Run-2 VH, H bb VBF(+ggF), H bb tth, H bb VBF+ggF tth VH Comb. ATLAS Preliminary s= 7 TeV, 8 TeV, and 13 TeV Total Stat. 4.7 fb -1, 20.3 fb ( Tot. ) ( Stat., Syst. ) (, ) (, ) (, ) , and fb (, ) -1 Significance: 5.4σ observed (5.5σ expected) Observation of H bb!! µ H bb VH combination NEW Run-2 VH, H bb VH, H γγ VH, H ZZ* Significance: 5.3σ observed (4.8σ expected) Observation of VH production!! 17 Giacinto Piacquadio - ICHEP 2018

18 Higgs boson coupling to fermions Indirect probe (through loop diagrams) t,b t,b t,b + + gg! H H! Direct probe (tree-level diagrams) Leptons Down-type quarks Up-type quarks 3rd gen. H! H! b b t th 2nd gen. H! µµ H! c c 18 Giacinto Piacquadio - ICHEP 2018

Main discriminant variables: m ττ, crucial to distinguish H ττ from large Z ττ background CMS (6 of 9 categories) ATLAS (1 of 13 categories) Normalization of Z ττ estimated from data, shapes from

19 Z. Zinonos A. Mohammadi Measurement of H ττ [Phys. Lett. B 779 (2018) 283] [ATLAS-CONF ] All τ leptonic and hadronic decay modes considered (τ lep τlep, τlep τhad, τhad τhad) Categories target VBF production and Gluon Fusion in the boosted regime. Main discriminant variables: m ττ, crucial to distinguish H ττ from large Z ττ background CMS (6 of 9 categories) ATLAS (1 of 13 categories) Normalization of Z ττ estimated from data, shapes from (corrected) simulation. Observation of H ττ by each experiment alone! CMS: recent analysis of VH, H ττ [CMS-PAS-HIG ] µ CMS (stat) (syst) (th) (MCstat) * ATLAS (stat) (syst) (th) Significance: 5.9σ (5.9σ) observed (exp.)* Significance: 6.4σ (5.4σ) observed (exp.)* 19 Giacinto Piacquadio - ICHEP 2018 *Run-1+Run-2

20 Higgs boson coupling to fermions Indirect probe (through loop diagrams) t,b t,b t,b + + gg! H H! Direct probe (tree-level diagrams) Leptons Down-type quarks Up-type quarks 3rd gen. H! H! b b t th 2nd gen. H! µµ H! c c 20 Giacinto Piacquadio - ICHEP 2018

21 H. Li R. Gerosa H μμ [ATLAS-CONF ] [CMS-PAS-HIG ] Events with two isolated opposite-sign muons selected, triggered by leading muon (pt>~25 GeV) Categorization based on muon centrality (η), [ptμμ], and BDT that enhances VBF contribution Drell-Yan Z background VBF Higgs Fit to m μμ distribution in each category Background determined from sidebands using analytic function NEW CMS (36fb -1 ) ATLAS (80fb -1 ) µ µµ µµµ < 2.6 (2.1 exp) µµµ < 2.1 (2.0 exp) 95% CL Both experiments getting close to SM sensitivity! 21 Giacinto Piacquadio - ICHEP 2018

22 Higgs boson coupling to fermions Indirect probe (through loop diagrams) t,b t,b t,b + + gg! H H! Direct probe (tree-level diagrams) Leptons Down-type quarks Up-type quarks 3rd gen. H! H! b b t th 2nd gen. H! µµ H! c c 22 Giacinto Piacquadio - ICHEP 2018

23 Coupling to top-quark tth production Yukawa coupling proportional to fermion mass Largest coupling to top quarks Very sensitive to new physics! 23 Giacinto Piacquadio - ICHEP 2018

24 Measuring tth production H! ZZ! 4` H! H! WW! ` ` H! (multi-leptons) H! b b Higher purity Higher σ x BR 24 Giacinto Piacquadio - ICHEP 2018

05485] Phys.Rev.D.97(2018)072003 ATLAS 4.1σ (3.7σ exp.) CMS 1.4σ (1.5σ exp.

25 C. Pardos Y. Horii Measuring tth production H! ZZ! 4` H! H! WW! ` ` H! (multi-leptons) H! b b [arxiv: ] [Phys. Rev. D 97 (2018) ] [arxiv: ] [arxiv: ] [arxiv: ] Phys.Rev.D.97(2018) ATLAS 4.1σ (3.7σ exp.) CMS 1.4σ (1.5σ exp.) (80fb -1 ) 25 Giacinto Piacquadio - ICHEP σ (2.8σ exp.) 3.2σ (2.8σ exp.) 1.4σ (1.6σ exp.) 1.6σ (2.2σ exp.) (CMS: incl. all-hadronic channel)

26 C. Pardos Y. Horii Combination of tth measurements [arxiv: ] CMS Run-1+Run-2: 5.2σ (4.2σ exp.) Observation of tth production! ATLAS (up to 80 fb -1 ) Run-2: 5.8σ (4.9σ exp.) Run-1+Run-2: 6.3σ (5.1σ exp.) 26 Giacinto Piacquadio - ICHEP 2018

27 Single top + Higgs 2 th / + / apple t / apple V [B. Stieger, ICHEP2018 talk] Very small production cross section in SM (t-channel = ~71 fb) But enhanced by factor x ~ if sign(κt/κv) opposite to SM σth > σtth So can be used with present Run-2 dataset to constraint relative sign of κt and κv. 27 Giacinto Piacquadio - ICHEP 2018

28 B. Stieger Single top + Higgs NEW CMS Run-2 combination of: th, H Multi-leptons (WW/ZZ/ττ) th, H bb tth, H γγ (use tth categories) apple V =1 [CMS-PAS-HIG ] Data favors sign(κt/κv) = 1 at 1.5σ level (~4σ expected) Complementary to constraints from H γγ and gg ZH production Assuming SM tth yield and SM th acceptance, can constraint σ(th): µ th < 26.5 (13.6 exp.) NEW 28 Giacinto Piacquadio - ICHEP 2018

29 Combining all Higgs boson measurements 29

Production [ATLAS-CONF-2018-031] [CMS-PAS-HIG-17-031] Inputs to combination 80 fb -1 80 fb -1 80 fb -1 80 fb -1 CMS ATLAS

30 Production [ATLAS-CONF ] [CMS-PAS-HIG ] Inputs to combination 80 fb fb fb fb -1 CMS ATLAS Decay 80 fb fb fb fb -1 µ 80 fb fb -1 µ + invisible invisible 30 Giacinto Piacquadio - ICHEP 2018

31 N. Morange N. Wardle Higgs production modes [CMS-PAS-HIG ] (exp) [ATLAS-CONF ] NEW 9-11% precision on ggf cross section by each experiment, compatible with SM State-of-the-art theory prediction (N3LO QCD+NLO EW [JHEP 1605 (2016) 058]), which has ~5% uncertainty. All main production modes, ggf, VBF, VH and tth have now been observed!! 31 Giacinto Piacquadio - ICHEP 2018 Significance obs (exp.) VBF VH tth ATLAS+CMS Run-1 5.4σ (4.6σ) 3.5σ (4.2σ) 4.4σ (2.0σ) ATLAS (single exp) 6.5σ (5.3σ) 5.3σ *(4.8σ) 5.8σ (5.3σ) * including VH, H bb (80 fb -1 )

32 N. Morange N. Wardle Couplings: results Hypothesis: no BSM Ratios of couplings [CMS-PAS-HIG ] [ATLAS-CONF ] SM Higgs boson couplings follow closely SM predictions over full explored mass range Ratios of couplings measured to precisions of 7-% (vector bosons) for to 17-20% (b-quarks) Already better than Run 1 ATLAS+CMS combination! * 32 Giacinto Piacquadio - ICHEP 2018 *does not include H bb observation

N. Wardle Measuring H invisible decays Exploit system recoiling against the H invisible, most sensitive mode VBF [CMS-PAS-HIG-17-023] 33 Giacinto Piacquadio - ICHEP 2018 Selection based on Missing ET

33 N. Wardle Measuring H invisible decays Exploit system recoiling against the H invisible, most sensitive mode VBF [CMS-PAS-HIG ] 33 Giacinto Piacquadio - ICHEP 2018 Selection based on Missing ET and two VBF jets Leading backgrounds Z( νν)jj and W( lν)jj Combined with searches in other production modes (VH and ggf) CMS 95% on BR(H inv) with 36 fb -1 B(H! inv) < 0.24 (0.18 exp.) Expected below 20%! (single experiment) Complementary to indirect determination in global fit CMS Run-2 combination of direct and indirect limits (CMS-PAS-HIG ) leads to: B(H! inv) < 0.22 (0.16 exp.) (assumption: κv <1)

34 The Higgs boson in the SM Higgs boson can also interact with itself, through quartic term in Higgs potential Very suppressed in SM! Can be probed through Di-Higgs production. V ( ) µ H H H 3i m2 H v 6i 34 Giacinto Piacquadio - ICHEP 2018 H H H H

35 Di-Higgs production SM + (gg! h) = 48.5 pb ~1/1500 (gg! hh) = (33.4 ± 5.9) fb [Higgs Xsec WG Report 4, ] Where to look for Di-Higgs production? hh decay branching ratios bbbb bbww bbττ bbγγ 34% 25% 7% 0.26% δ WWγγ 0.1% Higher σ x BR Higher purity 35 Giacinto Piacquadio - ICHEP 2018

A. Mehta D. Majumder [CERN-EP-2018-164] [CMS-PAS-HIG-17-017] New results on di-higgs production Similar CMS plot. NEW results released for ICHEP: ATLAS bbττ CMS bbbb and full combination!

36 A. Mehta D. Majumder [CERN-EP ] [CMS-PAS-HIG ] New results on di-higgs production Similar CMS plot. NEW results released for ICHEP: ATLAS bbττ CMS bbbb and full combination! Getting close to x SM rate for Di-Higgs production σhh bbττ < 13 x SM (15 exp.) σhh comb < 22 x SM (13 exp.) Long term goal: reach SM sensitivity by the end of HL-LHC (3000 fb -1 ) 36 Giacinto Piacquadio - ICHEP 2018

37 D. Majumder H Interpretation in terms of / H H CMS Di-Higgs combination used to constraint the trilinear coupling modifier k λ = λ/λsm ( 95% CL [CMS-PAS-HIG ] 37 Giacinto Piacquadio - ICHEP 2018

38 Conclusions Production Decays NEW = observed 38 Giacinto Piacquadio - ICHEP 2018 NEW Thanks to the first fb-1 of Run-2 data: The bosonic decay channels entered a precision era (~3x improvement w.r.t. Run-1) Direct observation achieved for all main production and decay modes! Direct confirmation of coupling to all 3rd generation fermions (top-quark, bottom-quark, taus) Sensitivity to double Higgs production approaching x SM Higgs physics an important indirect probe for New Physics: so far no deviations from SM But still at the beginning of a long journey! Only analyzed <3% of the final LHC luminosity.

39 BACKUP 39

40 pt(h) interpretation 40

ggh coupling) [Grazzini et al., arxiv:1705.

41 NEW Interpretation of pt(higgs) The pt(higgs) distribution (normalizations + shape) can be interpreted using an Effective Field Theory in terms of constraints on the coupling rescaling factors kt (top-quark), kb (bottom-quark) and cg (effective ggh coupling) [Grazzini et al., arxiv: v1] kt vs cg pt(h) spectrum can also be used to constraint coupling to c-quarks [Bishara et al., Phys. Rev. Lett. 118 (2017)] 41 Important additional handle to constrain the Higgs boson couplings!

42 ggf, H bb 42

43 Inclusive H bb Look for ggf, H bb with pt(h) > 450 GeV (particularly sensitive to BSM physics) Z bb: 5.1σ (5.8σ expected) ggf, Η bb: 1.5σ (0.7σ expected) 43 Reconstruct Z/H bb in a single fat R=0.8 AntiKt jet (remove soft activity, require a 2-prong decay, require double b-tagging) Clear observation of Z bb peak. Demonstrates new technique to look for inclusive H bb, and contributes to combined differential measurements of pt(h) above 450 GeV.

44 H WW 44

45 [ATLAS-CONF ] 45

46 VH, H bb 46

[Phys. Rev. Lett. 9 (2012) 071804] H bb 2012 CDF+DZero Evidence 2.

47 [Phys. Rev. Lett. 9 (2012) ] H bb 2012 CDF+DZero Evidence 2.8σ (1.5σ exp.) [3.1σ global] [Phys. Lett. B 780 (2018) 501] [JHEP 12 (2017) 024] Summer 2017 Evidence by both ATLAS and CMS [Phys. Rev. Lett. 9 (2012) ] 3.8σ (3.8σ exp.) 4.0σ (3.6σ exp.) 47

H bb (today) ATLAS MVA analysis Preliminary Total Stat. VH, H(bb) -1 s=13 TeV, 79.8 fb ( Tot. ) ( Stat., Syst. ) WH +0.47 0.43 +0.27 0.27 +0.38 0.

48 H bb (today) ATLAS MVA analysis Preliminary Total Stat. VH, H(bb) -1 s=13 TeV, 79.8 fb ( Tot. ) ( Stat., Syst. ) WH (, ) ZH (, ) Comb (, ) bb µ VH 48

49 49 ~9σ significance

NEW BDT distributions used in Likelihood Fit 0-lepton 1-lepton 2-lepton 2 jets Events / 0.13 4 3 2 ATLAS Preliminary -1 s = 13 TeV, 79.

13 5 4 3 2 ATLAS Preliminary -1 s = 13 TeV, 79.8 fb 1 lepton, 2 jets, 2 b-tags V p T 150 GeV Data VH Vbb (µ=1.

8 fb 2 leptons, 2 jets, 2 b-tags V p T 150 GeV Data VH Vbb (µ=1.16) Diboson Z tt Single top W Uncertainty Pre-fit background SM VH Vbb 1 Data/Pred. 1.5 1 BDT VH output 1 0.

13 5 4 3 ATLAS Preliminary -1 s = 13 TeV, 79.8 fb 0 lepton, 3 jets, 2 b-tags V p T 150 GeV Data VH Vbb (µ=1.

8 fb 1 lepton, 3 jets, 2 b-tags V p T 150 GeV Data VH Vbb (µ=1.16) Diboson tt Single top Multijet W Z Uncertainty Pre-fit background SM VH Vbb 0 Events / 0.

16) Diboson Z tt Single top W Uncertainty Pre-fit background SM VH Vbb 20 2 2 50 Data/Pred. 1.5 1 0.5 1 0.8 0.6 0.4 0.2 0 0.2 0.4 0.6 0.8 1 BDT VH output Data/Pred.

50 NEW BDT distributions used in Likelihood Fit 0-lepton 1-lepton 2-lepton 2 jets Events / ATLAS Preliminary -1 s = 13 TeV, 79.8 fb 0 lepton, 2 jets, 2 b-tags V p T 150 GeV Data VH Vbb (µ=1.16) Diboson tt Single top W Z Uncertainty Pre-fit background SM VH Vbb Events / ATLAS Preliminary -1 s = 13 TeV, 79.8 fb 1 lepton, 2 jets, 2 b-tags V p T 150 GeV Data VH Vbb (µ=1.16) Diboson tt Single top Multijet W Z Uncertainty Pre-fit background SM VH Vbb 20 Events / ATLAS Preliminary -1 s = 13 TeV, 79.8 fb 2 leptons, 2 jets, 2 b-tags V p T 150 GeV Data VH Vbb (µ=1.16) Diboson Z tt Single top W Uncertainty Pre-fit background SM VH Vbb 1 Data/Pred BDT VH output BDT VH output Data/Pred BDT VH output BDT VH output Data/Pred BDT VH output BDT VH output 3 ( 3) jets Events / ATLAS Preliminary -1 s = 13 TeV, 79.8 fb 0 lepton, 3 jets, 2 b-tags V p T 150 GeV Data VH Vbb (µ=1.16) Diboson tt Single top W Z Uncertainty Pre-fit background SM VH Vbb 50 Events / ATLAS Preliminary -1 s = 13 TeV, 79.8 fb 1 lepton, 3 jets, 2 b-tags V p T 150 GeV Data VH Vbb (µ=1.16) Diboson tt Single top Multijet W Z Uncertainty Pre-fit background SM VH Vbb 0 Events / ATLAS Preliminary -1 s = 13 TeV, 79.8 fb 2 leptons, 3 jets, 2 b-tags V p T 150 GeV Data VH Vbb (µ=1.16) Diboson Z tt Single top W Uncertainty Pre-fit background SM VH Vbb Data/Pred BDT VH output Data/Pred BDT VH output BDT VH output Data/Pred BDT VH output BDT VH output

51 NEW Systematic uncertainties with pulls µ V W+jets p T Z+jets m bb shape Diboson m bb shape VH acceptance (PS/UE) VH acceptance (QCD scales) b-jet tagging efficiency 1 tt m bb shape QCD scale for ggzh 2-lepton tt m bb shape c-jet tagging efficiency 1 b-jet tagging efficiency 0 c-jet tagging efficiency 0 VH 2-to-3 jets acc. (QCD) b-jet tagging efficiency 2 Single top acceptance (Wt oth) ATLAS Preliminary s = 13 TeV fb m H =125 GeV Pull: (θ - θ 0 )/ θ +1σ Postfit Impact on µ -1σ Postfit Impact on µ

52 80% compatibility across channels 0L: CBA 0L: MVA 1L: CBA 1L: MVA 2L: CBA 2L: MVA Comb: CBA Comb: MVA ATLAS Preliminary Total Stat. VH, H(bb) -1 s=13 TeV, 79.8 fb ( Tot. ) ( Stat., Syst. ) (, ) (, ) (, ) (, ) (, ) (, ) (, ) (, ) bb µ VH 52

53 53

54 CMS tth, H bb 54

55 55

Measurements of Fermionic Couplings of the Standard Model Higgs Boson using the bb, ττ and µµ Decay Channels with the ATLAS Detector

Measurements of Fermionic Couplings of the Standard Model Higgs Boson using the bb, ττ and µµ Decay Channels with the ATLAS Detector International Europhysics Conference on High Energy Physics Venice,