CMS logoCMS event Hgg
Compact Muon Solenoid
LHC, CERN

CMS-PAS-HIG-17-005
Search for production of a Higgs boson and a single top quark in multilepton final states in proton collisions at $\sqrt{s}= $ 13 TeV
Abstract: A search for the production of a Higgs boson in association with a single top quark is presented, focusing on leptonic signatures provided by the $\mathrm{H}\rightarrow\mathrm{W}\mathrm{W}$, $\mathrm{H}\rightarrow\tau\tau$, and $\mathrm{H}\rightarrow\mathrm{Z}\mathrm{Z}$ decay modes. Due to strong interference of the two main leading-order diagrams, the production cross section of this process is highly sensitive to the relative sign of the top-Higgs coupling modifier, $\kappa_{\mathrm{t}}$, and the coupling modifier of vector bosons to the Higgs, $\kappa_{\mathrm{V}}$. The analysis exploits signatures with two same-sign leptons or three leptons in the final state, and uses the 2016 data sample collected with the CMS detector at the LHC at a center of mass energy of 13 TeV, which corresponds to an integrated luminosity of 35.9 fb$^{-1}$. Multivariate techniques are used to discriminate the signal from the dominant backgrounds. The analysis yields a 95% confidence level (C.L.) upper limit on the combined $\mathrm{tH}+\mathrm{t\overline{t}H}$ production cross section times branching ratio of 0.64 pb, with an expected limit of 0.32 pb, for a scenario with $\kappa_\mathrm{t}=-1.0$ and $\kappa_\mathrm{V}= 1.0$. Values of $\kappa_\mathrm{t}$ outside the range of $-1.25$ to $+1.60$ are excluded at 95% C.L., assuming $\kappa_\mathrm{V}=1.0$.
Figures & Tables Summary Additional Figures References CMS Publications
Figures

png pdf
Figure 1:
Dominant leading order Feynman diagrams for the production of ${\mathrm{ t } \mathrm{ H } \mathrm {q}} $ events. The Higgs boson is either radiated from the W boson (left) or the top quark (right).

png pdf
Figure 1-a:
Dominant leading order Feynman diagram for the production of ${\mathrm{ t } \mathrm{ H } \mathrm {q}} $ events. The Higgs boson is radiated from the W boson.

png pdf
Figure 1-b:
Dominant leading order Feynman diagram for the production of ${\mathrm{ t } \mathrm{ H } \mathrm {q}} $ events. The Higgs boson is radiated from the top quark.

png pdf
Figure 2:
Distributions of discriminating variables for the event pre-selection for the same-sign ${\mu \mu } $ channel, normalized to 35.9 fb$^{-1}$, before fitting the signal discriminant to the observed data. Uncertainties are statistical and unconstrained (pre-fit) normalization systematics. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$.

png pdf
Figure 2-a:
Distribution for the event pre-selection for the same-sign ${\mu \mu } $ channel, normalized to 35.9 fb$^{-1}$, before fitting the signal discriminant to the observed data. Uncertainties are statistical and unconstrained (pre-fit) normalization systematics. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$.

png pdf
Figure 2-b:
Distribution for the event pre-selection for the same-sign ${\mu \mu } $ channel, normalized to 35.9 fb$^{-1}$, before fitting the signal discriminant to the observed data. Uncertainties are statistical and unconstrained (pre-fit) normalization systematics. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$.

png pdf
Figure 2-c:
Distribution for the event pre-selection for the same-sign ${\mu \mu } $ channel, normalized to 35.9 fb$^{-1}$, before fitting the signal discriminant to the observed data. Uncertainties are statistical and unconstrained (pre-fit) normalization systematics. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$.

png pdf
Figure 3:
Distributions of discriminating variables for the event pre-selection for the same-sign${\mathrm{ e } \mu } $ channel, normalized to 35.9 fb$^{-1}$, before fitting the signal discriminant to the observed data. Uncertainties are statistical and unconstrained (pre-fit) normalization systematics. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$.

png pdf
Figure 3-a:
Distribution for the event pre-selection for the same-sign${\mathrm{ e } \mu } $ channel, normalized to 35.9 fb$^{-1}$, before fitting the signal discriminant to the observed data. Uncertainties are statistical and unconstrained (pre-fit) normalization systematics. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$.

png pdf
Figure 3-b:
Distribution for the event pre-selection for the same-sign${\mathrm{ e } \mu } $ channel, normalized to 35.9 fb$^{-1}$, before fitting the signal discriminant to the observed data. Uncertainties are statistical and unconstrained (pre-fit) normalization systematics. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$.

png pdf
Figure 3-c:
Distribution for the event pre-selection for the same-sign${\mathrm{ e } \mu } $ channel, normalized to 35.9 fb$^{-1}$, before fitting the signal discriminant to the observed data. Uncertainties are statistical and unconstrained (pre-fit) normalization systematics. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$.

png pdf
Figure 4:
Distributions of discriminating variables for the event pre-selection for the three lepton channel, normalized to 35.9 fb$^{-1}$, before fitting the signal discriminant to the observed data. Uncertainties are statistical and unconstrained (pre-fit) normalization systematics. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$.

png pdf
Figure 4-a:
Distribution for the event pre-selection for the three lepton channel, normalized to 35.9 fb$^{-1}$, before fitting the signal discriminant to the observed data. Uncertainties are statistical and unconstrained (pre-fit) normalization systematics. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$.

png pdf
Figure 4-b:
Distribution for the event pre-selection for the three lepton channel, normalized to 35.9 fb$^{-1}$, before fitting the signal discriminant to the observed data. Uncertainties are statistical and unconstrained (pre-fit) normalization systematics. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$.

png pdf
Figure 4-c:
Distribution for the event pre-selection for the three lepton channel, normalized to 35.9 fb$^{-1}$, before fitting the signal discriminant to the observed data. Uncertainties are statistical and unconstrained (pre-fit) normalization systematics. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$.

png pdf
Figure 5:
Pre-fit BDT classifier outputs, for the three-lepton channel (left), ${\mathrm{ e } \mu } $ (center), and ${\mu \mu } $ (right), for 35.9 fb$^{-1}$, for training against ${{\mathrm{ t } \mathrm{ \bar{t} } } \mathrm {V}} $ (top row) and against ${\mathrm{ t } \mathrm{ \bar{t} } } $ (bottom row). In the box below each distribution, the ratio of the observed and predicted event yields is shown. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$. The grey band represents the unconstrained (pre-fit) statistical and systematical uncertainties.

png pdf
Figure 5-a:
Pre-fit BDT classifier output, for the three-lepton channel , for 35.9 fb$^{-1}$, for training against ${{\mathrm{ t } \mathrm{ \bar{t} } } \mathrm {V}} $. In the box below the distribution, the ratio of the observed and predicted event yields is shown. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$. The grey band represents the unconstrained (pre-fit) statistical and systematical uncertainties.

png pdf
Figure 5-b:
Pre-fit BDT classifier output, for ${\mathrm{ e } \mu } $, for 35.9 fb$^{-1}$, for training against ${{\mathrm{ t } \mathrm{ \bar{t} } } \mathrm {V}} $. In the box below the distribution, the ratio of the observed and predicted event yields is shown. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$. The grey band represents the unconstrained (pre-fit) statistical and systematical uncertainties.

png pdf
Figure 5-c:
Pre-fit BDT classifier output, for ${\mu \mu } $, for 35.9 fb$^{-1}$, for training against ${{\mathrm{ t } \mathrm{ \bar{t} } } \mathrm {V}} $. In the box below the distribution, the ratio of the observed and predicted event yields is shown. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$. The grey band represents the unconstrained (pre-fit) statistical and systematical uncertainties.

png pdf
Figure 5-d:
Pre-fit BDT classifier output, for the three-lepton channel, for 35.9 fb$^{-1}$, for training against ${\mathrm{ t } \mathrm{ \bar{t} } } $. In the box below the distribution, the ratio of the observed and predicted event yields is shown. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$. The grey band represents the unconstrained (pre-fit) statistical and systematical uncertainties.

png pdf
Figure 5-e:
Pre-fit BDT classifier output, for ${\mathrm{ e } \mu } $, for 35.9 fb$^{-1}$, for training against ${\mathrm{ t } \mathrm{ \bar{t} } } $. In the box below the distribution, the ratio of the observed and predicted event yields is shown. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$. The grey band represents the unconstrained (pre-fit) statistical and systematical uncertainties.

png pdf
Figure 5-f:
Pre-fit BDT classifier output, for ${\mu \mu } $, for 35.9 fb$^{-1}$, for training against ${\mathrm{ t } \mathrm{ \bar{t} } } $. In the box below the distribution, the ratio of the observed and predicted event yields is shown. The shape of the two ${\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0, {\kappa _\text {V}} =1.0$. The grey band represents the unconstrained (pre-fit) statistical and systematical uncertainties.

png pdf
Figure 6:
Post-fit categorized BDT classifier outputs as used in the maximum likelihood fit for the three-lepton channel (left), ${\mathrm{ e } \mu } $ (center), and ${\mu \mu } $ (right), for 35.9 fb$^{-1}$. In the box below each distribution, the ratio of the observed and predicted event yields is shown.

png pdf
Figure 6-a:
Post-fit categorized BDT classifier outputs as used in the maximum likelihood fit for the three-lepton channel, for 35.9 fb$^{-1}$. In the box below the distribution, the ratio of the observed and predicted event yields is shown.

png pdf
Figure 6-b:
Post-fit categorized BDT classifier outputs as used in the maximum likelihood fit for ${\mathrm{ e } \mu } $, for 35.9 fb$^{-1}$. In the box below the distribution, the ratio of the observed and predicted event yields is shown.

png pdf
Figure 6-c:
Post-fit categorized BDT classifier outputs as used in the maximum likelihood fit for ${\mu \mu } $, for 35.9 fb$^{-1}$. In the box below the distribution, the ratio of the observed and predicted event yields is shown.

png pdf
Figure 7:
Observed and expected 95% C.L. upper limit on the $ {\mathrm{ t } \mathrm{ H } } + {{\mathrm{ t } \mathrm{ \bar{t} } } \mathrm {H}} $ cross section times $\mathrm{ H } \to {\mathrm {W}} {\mathrm {W}} ^*+ {\tau \tau } +{\mathrm{ Z } } {\mathrm{ Z } } ^*$ branching fraction for different values of the coupling ratio ${\kappa _\mathrm{ t } } / {\kappa _\text {V}} $. The expected limit is derived from a background-only MC dataset.
Tables

png pdf
Table 1:
Summary of event selection.

png pdf
Table 2:
Data yields and expected backgrounds after the event pre-selection for the three channels in 35.9 fb$^{-1}$ of integrated luminosity. Uncertainties are statistical only.

png pdf
Table 3:
Input variables to the signal discrimination classifier.

png pdf
Table 4:
Expected and observed 95% C.L. upper limits on the $ {\mathrm{ t } \mathrm{ H } } + {{\mathrm{ t } \mathrm{ \bar{t} } } \mathrm {H}} $ production cross section times $\mathrm{ H } \to {\mathrm {W}} {\mathrm {W}} ^*+ {\tau \tau } +{\mathrm{ Z } } {\mathrm{ Z } } ^*$ branching ratio for a scenario of inverted couplings ($ {\kappa _\mathrm{ t } } / {\kappa _\text {V}} =-1.0$, top rows) and for a standard-model-like signal ($ {\kappa _\mathrm{ t } } / {\kappa _\text {V}} =1.0$, bottom rows), in pb. The expected limit is calculated on a background-only MC dataset.
Summary
A search for the production of a Higgs boson in association with a single top quark has been presented, using the CMS detector and the full 2016 data sample of pp collisions at 13 TeV, corresponding to an integrated luminosity of 35.9 fb$^{-1}$. Three channels have been analyzed, targeting the Higgs boson decaying to a pair of W or Z bosons, or two $\tau$ leptons and the leptonic decay of the top: two same-sign leptons (${\mu\mu} $, ${\mathrm{ e }\mu} $) and three leptons. This process can benefit from a greatly enhanced production cross section in the case of anomalous top-Higgs couplings, and the results are used to constrain these couplings.

Combining the results from all three channels yields a 95% confidence level (C.L.) upper limit on the production cross section times branching ratio of events containing a SM Higgs boson of 0.56 pb, with an expected limit of 0.24 pb.

Values of the ratio of Higgs-top coupling modifier ${\kappa_\mathrm{t }} $ and Higgs-vector boson coupling modifier ${\kappa_\text{V}} $ are outside the range $-1.25$ to $+1.60$ are excluded at 95% C.L.
Additional Figures

png pdf
Additional Figure 1:
Pre-fit categorized BDT classifier outputs, for the three-lepton channel (left), $ {\mathrm{ e } \mu } $ (center), and $ {\mu \mu } $ (right), for 35.9 fb$^{-1}$. In the box below each distribution, the ratio of the observed and predicted event yields is shown. The shape of the two $ {\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0$, ${\kappa _\text {V}} =1.0$. The grey band represents the unconstrained (pre-fit) statistical and systematical uncertainties.

png pdf
Additional Figure 1-a:
Pre-fit categorized BDT classifier outputs, for the three-lepton channel, for 35.9 fb$^{-1}$. In the box below each distribution, the ratio of the observed and predicted event yields is shown. The shape of the two $ {\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0$, ${\kappa _\text {V}} =1.0$. The grey band represents the unconstrained (pre-fit) statistical and systematical uncertainties.

png pdf
Additional Figure 1-b:
Pre-fit categorized BDT classifier outputs, for $ {\mathrm{ e } \mu } $, for 35.9 fb$^{-1}$. In the box below each distribution, the ratio of the observed and predicted event yields is shown. The shape of the two $ {\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0$, ${\kappa _\text {V}} =1.0$. The grey band represents the unconstrained (pre-fit) statistical and systematical uncertainties.

png pdf
Additional Figure 1-c:
Pre-fit categorized BDT classifier outputs, for $ {\mu \mu } $, for 35.9 fb$^{-1}$. In the box below each distribution, the ratio of the observed and predicted event yields is shown. The shape of the two $ {\mathrm{ t } \mathrm{ H } } $ signals for $ {\kappa _\mathrm{ t } } =-1.0$ is shown, normalized to their respective cross sections for $ {\kappa _\mathrm{ t } } =-1.0$, ${\kappa _\text {V}} =1.0$. The grey band represents the unconstrained (pre-fit) statistical and systematical uncertainties.

png pdf
Additional Figure 2:
Post-fit categorized BDT classifier outputs (on logarithmic scale) as used in the maximum likelihood fit for the three-lepton channel (left), $ {\mathrm{ e } \mu } $ (center), and $ {\mu \mu } $ (right), for 35.9 fb$^{-1}$. In the box below each distribution, the ratio of the observed and predicted event yields is shown.

png pdf
Additional Figure 2-a:
Post-fit categorized BDT classifier outputs (on logarithmic scale) as used in the maximum likelihood fit for the three-lepton channel, for 35.9 fb$^{-1}$. In the box below each distribution, the ratio of the observed and predicted event yields is shown.

png pdf
Additional Figure 2-b:
Post-fit categorized BDT classifier outputs (on logarithmic scale) as used in the maximum likelihood fit for $ {\mathrm{ e } \mu } $, for 35.9 fb$^{-1}$. In the box below each distribution, the ratio of the observed and predicted event yields is shown.

png pdf
Additional Figure 2-c:
Post-fit categorized BDT classifier outputs (on logarithmic scale) as used in the maximum likelihood fit for $ {\mu \mu } $, for 35.9 fb$^{-1}$. In the box below each distribution, the ratio of the observed and predicted event yields is shown.

png pdf
Additional Figure 3:
Observed and expected 95% C.L. upper limit on the $ {\mathrm{ t } \mathrm{ H } } + {{\mathrm{ t } {}\mathrm{ \bar{t} } } \mathrm {H}} $ cross section times $\mathrm{ H } \to {\mathrm {W}} {\mathrm {W}} ^*+ {\tau \tau } +{\mathrm{ Z } } {\mathrm{ Z } } ^*$ branching fraction for different values of the coupling ratio ${\kappa _\mathrm{ t } } / {\kappa _\text {V}}$. The expected limit is derived from a MC dataset of SM processes including the contributions from ${{\mathrm{ t } {}\mathrm{ \bar{t} } } \mathrm {H}} $ and $ {\mathrm{ t } \mathrm{ H } } $ expected in the SM.
References
1 CMS Collaboration Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC Phys.Lett. B716 (2012) 30--61 CMS-HIG-12-028
1207.7235
2 ATLAS Collaboration Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC Phys.Lett. B716 (2012) 1--29 1207.7214
3 CMS Collaboration Measurement of the top quark mass using proton-proton data at $ {\sqrt{s}} = $ 7 and 8 TeV PRD93 (2016), no. 7, 072004 CMS-TOP-14-022
1509.04044
4 S. Biswas, E. Gabrielli, F. Margaroli, and B. Mele Direct constraints on the top-Higgs coupling from the 8 TeV LHC data JHEP 07 (2013) 73
5 B. Hespel, F. Maltoni, and E. Vryonidou Higgs and Z boson associated production via gluon fusion in the SM and the 2HDM JHEP 06 (2015) 065 1503.01656
6 ATLAS Collaboration Measurements of Higgs boson production and couplings in diboson final states with the ATLAS detector at the LHC PLB726 (2013) 88--119 1307.1427
7 CMS Collaboration Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 TeV EPJC75 (2015) 212 CMS-HIG-14-009
1412.8662
8 ATLAS, CMS Collaboration Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC pp collision data at $ \sqrt{s}= $ 7 and 8 TeV Submitted to JHEP 1606.02266
9 J. Ellis and T. You Updated Global Analysis of Higgs Couplings JHEP 06 (2013) 103 1303.3879
10 G. Bordes and B. van Eijk On the associate production of a neutral intermediate mass Higgs boson with a single top quark at the LHC and SSC PLB 299 (1993) 315
11 T. M. P. Tait and C. P. Yuan Single top quark production as a window to physics beyond the standard model PRD 63 (2000) 014018 hep-ph/0007298
12 M. Farina et al. Lifting degeneracies in Higgs couplings using single top production in association with a Higgs boson JHEP 1305 (2013) 022 1211.3736
13 F. Demartin, F. Maltoni, K. Mawatari, and M. Zaro Higgs production in association with a single top quark at the LHC EPJC 75 (2015), no. 6, 267
14 F. Demartin et al. tWH associated production at the LHC EPJC77 (2017) 34 1607.05862
15 CMS Collaboration Search for the associated production of a Higgs boson with a single top quark in proton-proton collisions at $ \sqrt{s}= $ 8 TeV JHEP 06 (2016) 177 CMS-HIG-14-027
1509.08159
16 CMS Collaboration Search for $ \mathrm{ H }\to\mathrm{b }\mathrm{ \bar{b} } $ in association with a single top quark as a test of Higgs boson couplings at $ \sqrt{s} = $ 13 TeV CMS-PAS-HIG-16-019 CMS-PAS-HIG-16-019
17 CMS Collaboration Search for Higgs boson production in association with top quarks in multilepton final states at $ \sqrt{s} = $ 13 TeV
18 CMS Collaboration The CMS experiment at the CERN LHC JINST 3 (2008) S08004 CMS-00-001
19 CMS Collaboration Particle-Flow Event Reconstruction in CMS and Performance for Jets, Taus, and $ E_{T}^{miss} $ CDS
20 M. Cacciari, G. P. Salam, and G. Soyez FastJet User Manual EPJC72 (2012) 1896 1111.6097
21 M. Cacciari and G. P. Salam Dispelling the $ N^{3} $ myth for the $ k_T $ jet-finder PLB641 (2006) 57--61 hep-ph/0512210
22 CMS Collaboration Determination of Jet Energy Calibration and Transverse Momentum Resolution in CMS JINST 6 (2011) P11002 CMS-JME-10-011
1107.4277
23 CMS Collaboration Identification of b-quark jets with the CMS experiment JINST 8 (2013) P04013 CMS-BTV-12-001
1211.4462
24 CMS Collaboration Identification of b quark jets at the CMS Experiment in the LHC Run 2 CMS-PAS-BTV-15-001 CMS-PAS-BTV-15-001
25 CMS Collaboration Performance of CMS muon reconstruction in pp collision events at $ \sqrt{s} = $ 7 TeV JINST 7 (2012) P10002 CMS-MUO-10-004
1206.4071
26 CMS Collaboration Performance of Electron Reconstruction and Selection with the CMS Detector in Proton-Proton Collisions at $ \sqrt{s} = $ 8 TeV JINST 10 (2015), no. 06, P06005 CMS-EGM-13-001
1502.02701
27 K. Rehermann and B. Tweedie Efficient Identification of Boosted Semileptonic Top Quarks at the LHC JHEP 03 (2011) 059 1007.2221
28 CMS Collaboration Search for SUSY in same-sign dilepton events at $ \sqrt{s}= $ 13 TeV EPJC76 (2016) 439 CMS-SUS-15-008
1605.03171
29 J. Alwall et al. The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations JHEP 07 (2014) 079 1405.0301
30 J. Alwall et al. Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions EPJC53 (2008) 473--500 0706.2569
31 NNPDF Collaboration Parton distributions for the LHC Run II JHEP 04 (2015) 040 1410.8849
32 R. Frederix and S. Frixione Merging meets matching in MC@NLO JHEP 12 (2012) 061 1209.6215
33 P. Nason A New method for combining NLO QCD with shower Monte Carlo algorithms JHEP 0411 (2004) 040 hep-ph/0409146
34 S. Frixione, P. Nason, and C. Oleari Matching NLO QCD computations with parton shower simulations: the POWHEG method JHEP 11 (2007) 070 0709.2092
35 S. Alioli, P. Nason, C. Oleari, and E. Re A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX JHEP 06 (2010) 043 1002.2581
36 E. Re Single-top Wt-channel production matched with parton showers using the POWHEG method EPJC71 (2011) 1547 1009.2450
37 S. Alioli, P. Nason, C. Oleari, and E. Re NLO single-top production matched with shower in POWHEG: s- and t-channel contributions JHEP 0909 (2009) 111 0907.4076
38 T. Melia, P. Nason, R. Rontsch, and G. Zanderighi $ \text{W}^{+}\text{W}^{-} $, WZ and ZZ production in the POWHEG BOX JHEP 1111 (2011) 078 1107.5051
39 T. Sjostrand et al. An Introduction to PYTHIA 8.2 CPC 191 (2015) 159--177 1410.3012
40 J. Allison et al. GEANT4 developments and applications IEEE Trans. Nucl. Sci. 53 (2006) 270
41 LHC Higgs Cross Section Working Group Handbook of LHC Higgs Cross Sections: 4. Deciphering the Nature of the Higgs Sector 1610.07922
Compact Muon Solenoid
LHC, CERN