Higgs couplings in CMS in Run-2 Stephane Cooperstein (Princeton) on - - PowerPoint PPT Presentation
Higgs couplings in CMS in Run-2 Stephane Cooperstein (Princeton) on behalf of the CMS Collaboration 54th Rencontres de Moriond Electroweak unification and unified theories La Thuile, Italy, 16-23 March 2019 17/03/2019 S. Cooperstein
54th Rencontres de Moriond Electroweak unification and unified theories La Thuile, Italy, 16-23 March 2019
Stephane Cooperstein (Princeton)
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̅ last summer
Results shown today new since latest Higgs couplings combination, shown at Moriond last year
arXiv:1809.10733 Submitted to Eur. Phys. J. C
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ZZ
γ
Observed:
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̅ events but S/B ~1-10%
Z→νν, and W→ℓν
(DNN) to:
differentiate S vs. B
topology (no inherent missing energy)
Vector boson b-jet b-jet
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= 1.04 ± 0.20
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Z/γ*→µµ background.
discriminate S vs. B.
discriminate VBF H from B.
inputs to avoid biasing background shape.
resolution and fit Μµµ.
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13 TeV (2016 data)
second generation fermions!
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loop.
top associated production (ttH)
gluon fusion production (ggH)
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ttH search channel benefits/ challenges H→bb ̅ largest rate but combinatorics, challenging tt̅+bb ̅ bkg.
multilepton (H→WW*, ZZ* ,ττ)
lower rate but also less background H→γγ, ZZ(4l) very clean but small rate
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(bb̅, multilepton, γγ) 7+8+13 TeV (2016 only)
coupling to top quarks
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CMS-PAS-HIG-18-019
Significance 2017 data only: 1.7σ (2.9σ)
3.2σ (4.0σ)
leptons, ttW, ttZ.
N e w ( + 2 1 7 d a t a ) s i n c e
s e r v a t i
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CMS-PAS-HIG-18-018
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uncertainty than other ttH channels
New (+2017 data) since observation
CMS-PAS-HIG-18-018
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background-dominated signatures,..)
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Z(νν)+jets and W(ℓv) +jets.
W(ℓv)+jets shapes from 1- and 2-lepton sidebands and fit mjj.
Z(νν)+jets extrapolated from 2-lepton sideband W(lν)+jets extrapolated from 1- lepton sideband
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data: VBF, Z(ll)H, W(q’q)H, ggH.
ggH channels.
portal models of DM interactions.
GeV assuming fermion (scalar DM) candidate.
NEW RESULT
arXiv:1809.05937 submitted to Phys. Lett. B
C M S : s c a l a r D M C M S : f e r m i
D M
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(GeV)
µ 4
M
20 40 60 80 100 120 140
Events / 3 GeV
10 1 10
2
10
(GeV)
µ 4
M
20 40 60 80 100 120 140
Events / 3 GeV
10 1 10
2
10
(13 TeV)
37.5 fb
CMS
Preliminary Data Background Model Boson Signals
(GeV)
µ 4
M
40 60 80 100 120 140
Events / 4 GeV
10 1 10
2
10
(GeV)
µ 4
M
40 60 80 100 120 140
Events / 4 GeV
10 1 10
2
10
(13 TeV)
37.5 fb
CMS
Preliminary Data Background Model Boson Signals
magnitude.
backgrounds
BSM physics.
NEW RESULT
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CMS-PAS-HIG-18-025
expected
B(H → J/ψJ/ψ) × 103
1.8 1.8+0.2
−0.1
B(H → ΥΥ) × 103
1.4 1.4 ± 0.1
B(Z → J/ψJ/ψ) × 106
2.2 2.8+1.2
−0.7
B(Z → ΥΥ) × 106
1.5 1.5 ± 0.1
̅ in 2018, previous observation of H→ττ.
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CMS-DP-2017-005
(b, bb, c, cc, light).
nodes each.
tree (BDT)-based tagger.
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25 1 Apr 1 May 1 Jun 1 Jul 1 Aug 1 Sep 1 Oct 1 Nov 1 Dec
Date (UTC)
20 40 60 80 100
Total Integrated Luminosity (fb¡1 )
£ 50
Data included from 2010-03-30 11:22 to 2018-10-26 08:23 UTC 2010, 7 TeV, 45.0 pb¡1 2011, 7 TeV, 6.1 fb¡1 2012, 8 TeV, 23.3 fb¡1 2015, 13 TeV, 4.2 fb¡1 2016, 13 TeV, 41.0 fb¡1 2017, 13 TeV, 49.8 fb¡1 2018, 13 TeV, 67.9 fb¡1 20 40 60 80 100
CMS Integrated Luminosity Delivered, pp
CMS-HIG-17-0216, accepted for publication by JHEP JHEP 08 (2018) 066
JHEP 06 (2018) 101
+ ttH, H→γγ ttH multilepton
̅ fully hadronic ttH, H→bb ̅ 1+2l + Run-1 data
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Events / Bin
10
2
10
3
10
4
10
5
10
CMS
(13 TeV)
35.9 fb
Data Background = 0.72) µ Signal ( = 1) µ SM (
(S/B)
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Pre-fit expected log
2.5 − 2.0 − 1.5 − 1.0 − 0.5 −
Data / Bkg.
0.6 0.8 1.0 1.2 1.4
= 125 GeV
H
at m
SM
σ / σ = µ Best fit
2 − 2 4 6
Combined Dilepton Single-lepton
CMS
(13 TeV)
35.9 fb syst stat tot µ
+0.44
+0.27
+0.52
0.84
+1.04
+0.63
+1.21
+0.38
+0.24
+0.45
0.72
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Z→ℓℓ, Z→νν, and W→ℓν channels.
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per-channel DNN’s to discriminate S from B
DNN multiclassifiers to differentiate background components (V+bb, V+b, V+udcsg, tt)
V+udcsg, tt normalizations from data.
regions to extract single signal strength.
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̅ signal with same techniques.
̅ signal.
̅ ) selection to include Z(bb ̅ ).
̅ “signal”
̅ analysis:
Channel compatibility: 64%
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Channel compatibility: 64%
Channel compatibility: 97%
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systematic uncertainty component.
uncertainty is still the largest contribution.
modelling
background DNN multi-classifier.
misidentification rate
background events.
renormalization and factorization scales.
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38 BDT response Maximum ggH VBF WH ZH ttH Signal Bkg/GeV FWHM Bkg fit S/
√
B quantile [%] muon |η| [%] [%] [%] [%] [%] @125 GeV
[GeV]
function @ FWHM 0 – 8
|η|< 2.4
4.9 1.3 3.3 6.3 32 21.2 3.13 × 103 4.2 mBW Bdeg 4 0.12 8 – 39 1.9 <|η|< 2.4 5.6 1.7 3.9 3.5 1.3 22.3 1.34 × 103 7.2 mBW Bdeg 4 0.16 8 – 39 0.9 <|η|< 1.9 10 2.8 6.5 6.4 5.2 41.1 2.24 × 103 4.1 mBW Bdeg 4 0.29 8 – 39
|η|< 0.9
3.2 0.8 1.9 2.1 3.5 12.7 7.83 × 102 2.9 mBW Bdeg 4 0.18 39 – 61 1.9 <|η|< 2.4 2.9 1.7 2.7 2.7 0.3 11.8 4.37 × 102 7.0 mBW Bdeg 4 0.14 39 – 61 0.9 <|η|< 1.9 7.2 3.3 6.1 5.2 1.3 29.2 9.70 × 102 4.0 mBW Bdeg 4 0.31 39 – 61
|η|< 0.9
3.6 1.1 2.6 2.2 0.9 14.5 4.81 × 102 2.8 mBW 0.26 61 – 76 1.9 <|η|< 2.4 1.2 1.5 1.8 1.7 0.2 5.2 1.48 × 102 7.6 mBW Bdeg 4 0.11 61 – 76 0.9 <|η|< 1.9 4.8 3.6 4.5 4.4 0.7 20.3 5.12 × 102 4.2 mBW Bdeg 4 0.29 61 – 76
|η|< 0.9
3.2 1.6 2.3 2.1 0.6 13.1 3.22 × 102 3.0 mBW 0.28 76 – 91 1.9 <|η|< 2.4 1.2 3.1 2.2 2.1 0.2 5.8 1.04 × 102 7.1 mBW Bdeg 4 0.14 76 – 91 0.9 <|η|< 1.9 4.4 8.7 6.2 6.0 1.1 20.3 3.60 × 102 4.2 mBW Bdeg 4 0.35 76 – 91
|η|< 0.9
3.1 4.0 3.8 3.6 0.9 13.7 2.36 × 102 3.2 mBW 0.34 91 – 95
|η|< 2.4
1.7 6.4 2.5 2.6 0.5 8.6 96.0 4.0 mBW 0.28 95 – 100
|η|< 2.4
2.0 19 1.5 1.4 0.7 13.7 83.4 4.1 mBW 0.48 0 – 100
|η|< 2.4
59 61 51 52 49 253 1.30 × 104 3.9
increasing pT(H).
large jets which contain both b-quarks.
̅ in single merged jet topology!
measurement at high pT(H).
due to overwhelming multi-jet background.
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best combination of selection efficiency and background rejection.
resolution, trigger.
coupling:
combining ATLAS + CMS measurements.
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exposes relative sign of κV vs. κt.
= 70.96 fb.
increased by order of magnitude.
̅ : CMS-PAS-HIG-16-019
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