ATLAS + CMS Other heavy Higgs bosons Alexandra Oliveira on behalf - - PowerPoint PPT Presentation

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ATLAS + CMS Other heavy Higgs bosons Alexandra Oliveira on behalf - - PowerPoint PPT Presentation

Jun 08, 2023 218 likes •414 views

ATLAS + CMS Other heavy Higgs bosons Alexandra Oliveira on behalf of ATLAS + CMS collaborations BSMHiggsLPC: 3-5 Nov 2014 FNAL X t X VV hadronic X VV semi-leptonic X VV leptonic X / Z / W t X hh (125

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SLIDE 1

ATLAS + CMS Other heavy ”Higgs” bosons

Alexandra Oliveira

  • n behalf of ATLAS + CMS collaborations

BSMHiggsLPC: 3-5 Nov 2014 FNAL

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SLIDE 2

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

Aka searches for heavy resonances in di-boson and t¯ t final states free from extended Higgs sector interpretation, from 2014

◮ What are we talking about?! ◮ One additional spin-0 EW singlet (Dark portal, ... see S. Dawson talk) ◮ Extra dimensions / Strong-like theories (spin-0/2 resonances) ∗ ◮ Extended gauge sector (spin-1 resonances) ∗ ∗ Asking for poetic licence with respect to the original talk title ◮ Why this is a separated talk? ◮ Extended mass range hypothesis

no naturality arguments limiting expectations up to TeV range Boosted searches included

◮ The large natural with of 2HDM or MSSM Higgs bosons is not considered

results usually derived negligible width approximation (ΓX /MX ≪≪≪ 0.1)

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 2 / 19

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SLIDE 3

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

Final states mentioned in this talk

◮ X → VV hadronic ◮ X → VV semi-leptonic ◮ X → VV leptonic ◮ X → γγ/γZ/γW ◮ X → t¯

t

◮ X → hh (the 125 GeV one)

  • signal extraction method
  • object reconstruction techniques
  • model dependencies

You are invited to go to the references (and backup) for sensitivity results and other many interesting details. (There is no excess bigger than 2σ in the analyses mentioned in this talk) Model

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 3 / 19

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SLIDE 4

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

X → VV hadronic - boosted regime

Pruned-jet mass (GeV)

50 100 150 200

Events / 5 GeV

0.5 1 1.5 2 2.5 3

6

10 ×

Untagged data MADGRAPH+PYTHIA HERWIG++ 2.94E+07) (JHUGEN+PYTHIA) × ZZ ( → (1.5TeV)

bulk

G 1.52E+07) (JHUGEN+PYTHIA) × WW ( → (1.5TeV)

bulk

G 8.51E+04) PYTHIA × WZ ( → W’ (1.5 TeV) 1.34E+05) HERWIG++ × ZZ ( → (1.5 TeV)

RS

G 7.15E+04) HERWIG++ × WW ( → (1.5 TeV)

RS

G = 8 TeV s ,

  • 1

CMS, L = 19.7 fb CA pruned R=0.8 21

τ

  • subjettiness ratio

N

0.2 0.4 0.6 0.8 1

Events / 0.05

0.5 1 1.5 2 2.5

6

10 ×

Untagged data MADGRAPH+PYTHIA HERWIG++ 2.94E+07) (JHUGEN+PYTHIA) × ZZ ( → (1.5TeV)

bulk

G 1.52E+07) (JHUGEN+PYTHIA) × WW ( → (1.5TeV)

bulk

G 8.51E+04) PYTHIA × WZ ( → W’ (1.5 TeV) 1.34E+05) HERWIG++ × ZZ ( → (1.5 TeV)

RS

G 7.15E+04) HERWIG++ × WW ( → (1.5 TeV)

RS

G = 8 TeV s ,

  • 1

CMS, L = 19.7 fb CA R=0.8

Bump in di-jet mass spectra (pjet

T > 50(30) GeV),

∆ηjj < 1.2(1.3) prevents t–channel events ATLAS: mX ⊂ [0.8, 3.2] TeV CMS: mX ⊂ [1, 3] TeV Uses jet substructure to V-tag ⇒ acentuate results model dependency.

arXiv:1407.1376 + Twiki JHEP08(2014)173 + Twiki

W ′(WZ), q∗(jj) and bulk/RS1 KK-graviton (CMS,WW /ZZ).

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 4 / 19

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SLIDE 5

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

X → VV semi-leptonic - resolved + boosted regimes

W ′ (Z(ll)W (qq)) and bulk KK-graviton (Z(ll)Z(qq))

[GeV]

G*

M 400 600 800 1000 1200 1400 1600 1800 2000 Efficiency × Acceptance 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Total Acceptance

T

Resolved low-p

T

Resolved high-p Merged region with dilepton isolation Merged region with nominal lepton isolation ATLAS Simulation = 8 TeV s eeqq → ZZ → G* Events / GeV

  • 4

10

  • 3

10

  • 2

10

  • 1

10 1 10

2

10

3

10

4

10

5

10

Data Z+jets ZZ/ZW/WW +Single Top t t Sys+Stat Uncertainty G*, m=500 GeV 10.0 ×

Nominal

σ ATLAS = 8 TeV s

  • 1

L dt = 20.3 fb

∫

  • Res. Region

T

Low-p Channel µ µ ee, → Z

[GeV]

lljj

m 500 1000 1500 2000 2500 Data / BG 0.6 0.8 1 1.2 1.4

Single lepton trigger (pT > 24 GeV) with tracker+calo isolation (∆R > 0.2) Drop calo lepton isolation if 2 leptons w/ ∆Rll < 0.25 Hadronic V tag by Fat-jet mass = filter in CA1.2 recluster of AkT04 jets

arxiv:1409.6190 + Twiki

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 5 / 19

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SLIDE 6

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

X → VV semi-leptonic -resolved and boosted regimes

Fit in reconstructed resonance mass.

Boosted results given beyond narrow-width approximation.

GF spin-0 → W (lν)W (qq) Single lepton HLT (∆R > 0.3) + 2 AkT05 jets mX ⊂ [160, 600] GeV bulk KK-graviton (ZZ, WW ) and W ′ (WZ) Single and Di-lepton trigger, no isolation and loose definition Uses jet substructure to V-tag (as slide 4)

[GeV]

WW

m

1000 1500 2000 2500 3000

Events / 100 GeV

  • 3

10

  • 2

10

  • 1

10 1 10

2

10

3

10

4

10

5

10 HP) ν µ CMS Data ( W+jets WW/WZ t t Single t Uncertainty 100) × = 0.5 (

Pl

M / k = 1 TeV,

G

M

bulk

G = 8 TeV s at

  • 1

CMS L = 19.7 fb [GeV]

X

M 1000 1500 2000 2500

X

/ M

X

Γ 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 ) ν +e ν µ excluded at 95% CL (

events

N

50 100 150 200 250

CMS = 8 TeV s at

  • 1

L = 19.7 fb

100 200 300 400 500 600 700

Events/ 40 GeV

100 200 300 400 500

3

10 × = 8 TeV s

  • 1

dt = 19.3 fb L

∫

CMS preliminary Muon Data W+jets WW/WZ/ZZ top Z+Jets MC Uncertainty

(GeV)

jj ν l

m 200 400 600

Ratio Data/MC 0.6 0.8 1 1.2

G∗

CMS-HIG-13-027 + Twiki JHEP08(2014)174 + Twiki

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 6 / 19

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SLIDE 7

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

X → VV leptonic - resolved

W’ (W (lν)Z(ll)) Pair of same-flavor, opposite-charge, isolated leptons with mll ∼ mZ Both reco mass and total tranverse momenta used to extract signal. GF and VBF spin-0 (Z(ll)Z(νν)) Two well-identified, isolated same flavour leptons Signal extraction in transverse plane mX ⊂ [0.2, 1] TeV Njets define GF and VBF categories:

  • VBF: ∆ηjj > 4 and mjj > 500 GeV.

Missing transverse energy [GeV] 100 200 300 400 500 Events

  • 1

10 1 10

2

10

3

10

4

10

5

10

6

10

  • 1

L=19.6 fb ∫ =8 TeV, s CMS preliminary, Top,W,VV ZZ ν 3l → WZ Z+jets EWK Z+2jets data ZZ → ggH(300) ZZ → ggH(600) ZZ → qqH(300) ZZ → qqH(600) 100 200 300 400 500 Bckg Σ Data/ 0.5 1 1.5

(GeV)

T

L

200 400 600 800 1000

(GeV)

WZ

M

200 400 600 800 1000 1200 1400

Bkg Sig Data

(8 TeV)

  • 1

19.5 fb

Unpublished

CMS

mX = 1 TeV

arXiv:1407.3476 + Twiki

Both GF/VBF individual limits, + combined results in terms of Γinv, for X = EW scalar singlet. CMS-PAS-HIG-13-014 + Twiki

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 7 / 19

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SLIDE 8

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

X → VV combinations in selected benchmark scenarios

hadronic + semileptonic channel bulk KK-graviton benchmark Assuming TeV localized RH top

200 400 600 800 1000 1200 1400 10 4 0.001 0.01 0.1 1 MGr GeV GeV Bulk

tt gg aa hh WW ZZ

[GeV]

G

M

1000 1500 2000 2500 3000

) [pb]

bulk

G → (pp

95%

σ

  • 2

10

  • 1

10 1

CMS (unpublished) = 8 TeV s at

  • 1

L = 19.7 fb

600

  • bs. (solid) / exp. (dashed)

S

Frequentist CL +V-jet µ µ ee/ → ZZ →

bulk

G V-jet+V-jet → WW/ZZ →

bulk

G +V-jet ν µ / ν e → WW →

bulk

G Combination

JHEP08(2014)174 + Twiki

Work ongoing on spin-1 hypotheses combination

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 8 / 19

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SLIDE 9

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

X → γγ

GF and VBF spin-0 resonance and GF bulk KK-graviton (CMS) SM-like search for a bump in mγγ Extended range for bkg extimation, di-photon spectra is not like di-jet one:

  • ATLAS fit 2th order polinomial

in different mass ranges

  • CMS uses f (m) = e−p1mm−p2 in all range

[GeV]

γ γ

m 100 200 300 400 500 600 700 ]

  • 1

[GeV

γ γ

dN / dm

  • 1

10 1 10

2

10

3

10

Data = 125 GeV)

X

m Continuum+H fit ( = 250 GeV)

X

m Continuum+H fit ( = 500 GeV)

X

m Continuum+H fit (

  • 1

Ldt = 20.3 fb

∫

= 8 TeV, s ATLAS

115 120 125 130 135 600 800 1000 1200 1400 1600 1800 2000 2200 Data = 125 GeV)

X

m Continuum+H fit ( Continuum component of the fit

200 400 600 800 10 20 30 40 50 60 70 80

  • 4

10

  • 3

10

  • 2

10

All Categories Combined - Observed UL = 0.002 [pb] UL = 0.003 [pb] UL = 0.004 [pb] UL = 0.010 [pb] UL = 0.020 [pb]

(pb)

95%CL

) γ γ → BR (X × σ

[GeV]

X

m [GeV]

X

Γ

(8 TeV)

  • 1

19.7 fb

CMS Preliminary

Narrow width results in terms of ΓX PRL113,171801 + Twiki CMS-PAS-HIG-14-006 + Twiki

Work ongoing for 2HDM interpretations.

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 9 / 19

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SLIDE 10

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

X → γZ/γW leptonic

GF spin-0 resonance, W’ and Z’ Single lepton trigger + hard photon (pγ

T > 40 GeV)

fit in reconstructed resonance mass

Events / 80 GeV

  • 1

10 1 10

2

10

3

10

4

10

5

10

Data 2012 γ )+ ν W(e )+jets

  • e

+

Z(e )+jets ν W(e +jets γ Other Backgrounds ) = 600 GeV x 10

T

m(a σ 1 ± Background Fit ATLAS = 8 TeV s ,

  • 1

L dt = 20.3 fb

∫

[GeV]

γ ν e T

m

200 400 600 800 1000 1200 1400 1600

Significance

  • 1

1

Events / 60 GeV

  • 1

10 1 10

2

10

3

10

4

10

5

10

Data 2012 γ )+

+

e

  • Z(e

)+jets

+

e

  • Z(e

Other Backgrounds ) = 500 GeV x 10

T

ω m( σ 1 ± Background Fit = 8 TeV s ,

  • 1

L dt = 20.3 fb

∫

ATLAS

[GeV]

γ

  • e

+

e

m

200 400 600 800 1000 1200 1400 1600

Significance

  • 2
  • 1

1 2

W’ Z’

PLB738(2014)428-447 + Twiki

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 10 / 19

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SLIDE 11

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

X → t¯ t

Z ′ and KK-gluon Di-lepton (mX ⊂ [0.8, 3] TeV) Non isolated single lepton trigger + at least two (b)jets + MET. Boosted = ∆Rjl used for BKG rejection. Signal from reconstructed mX

]

2

[TeV/c

t t

M 0.5 1 1.5 2 2.5 3 )[pb] t t → Z' → (pp σ

  • 2

10

  • 1

10 1

Combination +jets µ Threshold e+ +jets µ Boosted e+ Boosted all-hadronic

Z' with 10% Decay Width = 8 TeV s ,

  • 1

CMS, 19.7 fb

Semi-leptonic + hadronic

[GeV]

t t

M

500 1000 1500 2000 2500 3000 3500

Events / 100 GeV

  • 1

10 1 10

2

10

3

10

4

10 Data t t

  • thers

Z' 2 TeV = 8 TeV s ,

  • 1

CMS, 19.7 fb = 0

b-tag

N µ e+ (a)

PRL111(2013)211804 + Twiki CMS-PAS-B2G-12-007 + Twiki

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 11 / 19

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SLIDE 12

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

X → h(γγ)h(b¯ b) (the 125 GeV one)

GF spin-0 and KK-graviton (CMS)

(GeV)

γ γ

m

100 110 120 130 140 150 160 170 180

Events / 2 GeV

20 40 60 80 100 120 140 Data and backgrounds Data standard model Higgs Z/W+g/gg t/tt+gg/gj QCD

= 1 TeV Λ Signal for = 300 GeV x 2

X

M = 500 GeV x 8

X

M = 700 GeV x 17

X

M = 1000 GeV x 48

X

M

= 8 TeV s

  • 1

CMS (Unpublished) L = 19.7 fb b b γ γ → HH → X (GeV)

kin jj γ γ

m

200 400 600 800 1000 1200

Events / 40 GeV

  • 1

10 1 10

2

10

3

10

4

10 Data and backgrounds Data standard model Higgs Z/W+g/gg t/tt+gg/gj QCD

= 1 TeV Λ Signal for = 300 GeV x 2

X

M = 500 GeV x 8

X

M = 700 GeV x 17

X

M = 1000 GeV x 48

X

M

= 8 TeV s

  • 1

CMS (Unpublished) L = 19.7 fb b b γ γ → HH → X [GeV]

bb γ γ

m 200 250 300 350 400 450 500 550 600 Fraction / 2.5 GeV 0.05 0.1 0.15 0.2 0.25 0.3 =260 GeV

X

m Constrained =300 GeV

X

m Constrained =350 GeV

X

m Constrained =500 GeV

X

m Constrained ATLAS Simulation = 8 TeV s

ATLAS: fit in mγγ b¯

b mass spectra, select in Higgses

for resonant and non-resonant results CMS, two strategies:

  • same of ATLAS for mX > 400 GeV
  • for mX < 400 GeV fit in mγγ,

select H(b¯ b) and 4-body Keep tuned for BSM non-resonant results from CMS!

arXiv:1406.5053 + Twiki CMS-PAS-HIG-13-032 + Twiki

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 12 / 19

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SLIDE 13

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

X → h(b¯ b)h(b¯ b) (125 GeV) - resolved analyses

GF spin-0 (CMS) and KK-graviton

(GeV)

H1

m 50 100 150 200 250 300 350 400 (GeV)

H2

m 50 100 150 200 250 300 350 400

SR SB VR VB

SR: Signal Region SB: Sideband Region VR: Validation Region VB: Validation Sideband (8 TeV)

  • 1

17.93 fb

CMS

Preliminary

  • ATLAS: combination of multi-jet triggers (AkT04)
  • CMS: multijet + 2b–tag at HLT (AkT05)

⇒ lower threshold aceptance. Signal extraction in mHH by sidebands in the reconstructed higgses Boost of Higgses defines jet pairing in intemediate mass regime.

ATLAS-CONF-2014-005 + Twiki CMS-PAS-HIG-14-013 + Twiki

Keep tuned for boosted regime from both collaborations!

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 13 / 19

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SLIDE 14

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

Conclusions

◮ Very fruitful Run I for resonant searches in di-boson channels ◮ No discovery yet ◮ Hints for Run II exploration ◮ Therefore it is still not finished

The next few months will be full of (8 TeV) news! And, in any results case, full of interpretation work...

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 14 / 19

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SLIDE 15

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

Thanks for attention!

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 15 / 19

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SLIDE 16

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

If we assume the 125 GeV boson to be THE neutral higgs boson

Both hh → 4b results are sensitive to spin hyp. 4b’s channel, bigger BR Di-photon trigger, smaller BKG

Keep tuned for h(ττ)h(b¯ b) and h(WW ∗)h(b¯ b) !

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 16 / 19

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SLIDE 17

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

Comparing channels for bulk KK-graviton

Results that are not sensitive to spin hypothesis or where derived to the benchmark.

(GeV)

Gr

M

500 1000 1500 2000 2500 3000

(pp -> X) (pb) Obs. exclusion σ

  • 2

10

  • 1

10 1 10

2

10

3

10 bulk KK-graviton, TeV localized RH top

hh bb γ γ 4b

tt

VV WW semileptonic VV semilep+had ν ν ZZ -> ll ZZ semileptonic ZZ -> 4l

bulk KK-graviton, TeV localized RH top

Cont.: ATLAS, Dashed:CMS

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 17 / 19

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SLIDE 18

X → VV hadronic X → VV semi-leptonic X → VV leptonic X → γγ/γZ/γW X → t¯ t X → hh (125 GeV)

Comparing channels for radion benchmark

(GeV)

r

M

200 300 400 500 600 700 800 900 1000

(pp -> X) (pb) Obs. exclusion σ

  • 1

10 1 10

2

10

3

10 radion

hh bb γ γ 4b

tt

VV WW semileptonic ZZ semileptonic ZZ -> 4l

radion

Results that are not sensitive to spin hypothesis or where derived to the benchmarck.

Cont.: ATLAS, Dashed:CMS

Di-higgs channel start to be competitive with VV in all search range

Thanks to V.Barger an M.Ishida for calculate the NLO radion BFs to 125 GeV higgs case.

Alexandra Oliveira ATLAS + CMS Other heavy ”Higgs” bosons 18 / 19