Search for large missing transverse momentum in association with one top-quark in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
This paper describes a search for events with one top-quark and large missing transverse momentum in the final state. Data collected during 2015 and 2016 by the ATLAS experiment from 13 TeV proton-proton collisions at the LHC corresponding to an integrated luminosity of 36.1 fb$^{-1}$ are used. Two channels are considered, depending on the leptonic or the hadronic decays of the $W$ boson from the top quark. The obtained results are interpreted in the context of simplified models for dark-matter production and for the single production of a vector-like $T$ quark. In the absence of significant deviations from the Standard Model background expectation, 95% confidence-level upper limits on the corresponding production cross-sections are obtained and these limits are translated into constraints on the parameter space of the models considered.
23 December 2018
Contact: Exotics conveners
internal
e-print arXiv:1812.09743 - pdf from arXiv
Figures
Figure 01a
Representative leading-order diagrams corresponding to the signals sought in this paper: non-resonant (a) t-channel and (b) s-channel production of a top-quark in association with a vector boson V which decays into two DM particles; (c) resonant production of a coloured scalar φ that decays into a DM particle and a top-quark; and (d) single production of a vector-like T quark decaying into Zt (→ ν ν b W).
png (22kB) pdf (10kB)
Figure 01b
Representative leading-order diagrams corresponding to the signals sought in this paper: non-resonant (a) t-channel and (b) s-channel production of a top-quark in association with a vector boson V which decays into two DM particles; (c) resonant production of a coloured scalar φ that decays into a DM particle and a top-quark; and (d) single production of a vector-like T quark decaying into Zt (→ ν ν b W).
png (71kB) pdf (10kB)
Figure 01c
Representative leading-order diagrams corresponding to the signals sought in this paper: non-resonant (a) t-channel and (b) s-channel production of a top-quark in association with a vector boson V which decays into two DM particles; (c) resonant production of a coloured scalar φ that decays into a DM particle and a top-quark; and (d) single production of a vector-like T quark decaying into Zt (→ ν ν b W).
png (57kB) pdf (14kB)
Figure 01d
Representative leading-order diagrams corresponding to the signals sought in this paper: non-resonant (a) t-channel and (b) s-channel production of a top-quark in association with a vector boson V which decays into two DM particles; (c) resonant production of a coloured scalar φ that decays into a DM particle and a top-quark; and (d) single production of a vector-like T quark decaying into Zt (→ ν ν b W).
png (27kB) pdf (10kB)
Figure 02a
Comparison of data and SM prediction for the ETmiss distribution in (a) the tt̄ and (b) Wboson+jets control regions; and for the transverse mass of the top-tagged large-R jet and ETmiss system, mT(ETmiss,J), distribution in the (c) tt̄ and (d) Wboson/Zboson+jet control regions used for the dark-matter search ((a) and (b)) and vector-like T-quark search ((c) and (d)). Other backgrounds in the 1L regions include multi-jet, Z+jets and diboson contributions, while in the 0L regions it is composed of diboson, tt̄ +X and multi-jet contributions. The expectations in the leptonic (hadronic) channel are obtained from a fit of the background-only hypothesis to data in the 1L (0L) control regions, where the normalisations of the tt̄ and Wboson+jets (tt̄ and Wboson/Zboson+jets) processes are treated as nuisance parameters in the fit. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (123kB) pdf (18kB)
Figure 02b
Comparison of data and SM prediction for the ETmiss distribution in (a) the tt̄ and (b) Wboson+jets control regions; and for the transverse mass of the top-tagged large-R jet and ETmiss system, mT(ETmiss,J), distribution in the (c) tt̄ and (d) Wboson/Zboson+jet control regions used for the dark-matter search ((a) and (b)) and vector-like T-quark search ((c) and (d)). Other backgrounds in the 1L regions include multi-jet, Z+jets and diboson contributions, while in the 0L regions it is composed of diboson, tt̄ +X and multi-jet contributions. The expectations in the leptonic (hadronic) channel are obtained from a fit of the background-only hypothesis to data in the 1L (0L) control regions, where the normalisations of the tt̄ and Wboson+jets (tt̄ and Wboson/Zboson+jets) processes are treated as nuisance parameters in the fit. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (132kB) pdf (18kB)
Figure 02c
Comparison of data and SM prediction for the ETmiss distribution in (a) the tt̄ and (b) Wboson+jets control regions; and for the transverse mass of the top-tagged large-R jet and ETmiss system, mT(ETmiss,J), distribution in the (c) tt̄ and (d) Wboson/Zboson+jet control regions used for the dark-matter search ((a) and (b)) and vector-like T-quark search ((c) and (d)). Other backgrounds in the 1L regions include multi-jet, Z+jets and diboson contributions, while in the 0L regions it is composed of diboson, tt̄ +X and multi-jet contributions. The expectations in the leptonic (hadronic) channel are obtained from a fit of the background-only hypothesis to data in the 1L (0L) control regions, where the normalisations of the tt̄ and Wboson+jets (tt̄ and Wboson/Zboson+jets) processes are treated as nuisance parameters in the fit. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (131kB) pdf (18kB)
Figure 02d
Comparison of data and SM prediction for the ETmiss distribution in (a) the tt̄ and (b) Wboson+jets control regions; and for the transverse mass of the top-tagged large-R jet and ETmiss system, mT(ETmiss,J), distribution in the (c) tt̄ and (d) Wboson/Zboson+jet control regions used for the dark-matter search ((a) and (b)) and vector-like T-quark search ((c) and (d)). Other backgrounds in the 1L regions include multi-jet, Z+jets and diboson contributions, while in the 0L regions it is composed of diboson, tt̄ +X and multi-jet contributions. The expectations in the leptonic (hadronic) channel are obtained from a fit of the background-only hypothesis to data in the 1L (0L) control regions, where the normalisations of the tt̄ and Wboson+jets (tt̄ and Wboson/Zboson+jets) processes are treated as nuisance parameters in the fit. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (123kB) pdf (18kB)
Figure 03a
Comparison of data and fitted expectations for the ETmiss and the transverse mass of the top-tagged large-R jet and ETmiss system, mT(ETmiss,J), distributions in the signal regions. Other backgrounds in the 1L regions include multi-jet, Z+jets and diboson contributions, while in the 0L regions it is composed of diboson and tt̄ +X contributions. The background-only hypothesis is used in the fit: (a) and (b) including the 1L and 0L DM signal regions as well as the 1L and 0L control regions; (c) 0L DM signal and control regions; (d) 0L VLT signal and control regions. The error bands include statistical and systematic uncertainties. The expected shape of a benchmark signal normalised to the theoretical prediction is added on top of the SM prediction. The benchmark signals correspond to: the non-resonant (NR) DM model with mV=1 TeV and 2 TeV, m χ =1 GeV, a=0.5 and g χ =1; the resonant (R) DM model with m φ =1 TeV and 2 TeV, m χ =10 GeV, λ = 0.2 and y=0.4; and a VLT with a mass of 0.9 TeV.
png (138kB) pdf (18kB)
Figure 03b
Comparison of data and fitted expectations for the ETmiss and the transverse mass of the top-tagged large-R jet and ETmiss system, mT(ETmiss,J), distributions in the signal regions. Other backgrounds in the 1L regions include multi-jet, Z+jets and diboson contributions, while in the 0L regions it is composed of diboson and tt̄ +X contributions. The background-only hypothesis is used in the fit: (a) and (b) including the 1L and 0L DM signal regions as well as the 1L and 0L control regions; (c) 0L DM signal and control regions; (d) 0L VLT signal and control regions. The error bands include statistical and systematic uncertainties. The expected shape of a benchmark signal normalised to the theoretical prediction is added on top of the SM prediction. The benchmark signals correspond to: the non-resonant (NR) DM model with mV=1 TeV and 2 TeV, m χ =1 GeV, a=0.5 and g χ =1; the resonant (R) DM model with m φ =1 TeV and 2 TeV, m χ =10 GeV, λ = 0.2 and y=0.4; and a VLT with a mass of 0.9 TeV.
png (146kB) pdf (18kB)
Figure 03c
Comparison of data and fitted expectations for the ETmiss and the transverse mass of the top-tagged large-R jet and ETmiss system, mT(ETmiss,J), distributions in the signal regions. Other backgrounds in the 1L regions include multi-jet, Z+jets and diboson contributions, while in the 0L regions it is composed of diboson and tt̄ +X contributions. The background-only hypothesis is used in the fit: (a) and (b) including the 1L and 0L DM signal regions as well as the 1L and 0L control regions; (c) 0L DM signal and control regions; (d) 0L VLT signal and control regions. The error bands include statistical and systematic uncertainties. The expected shape of a benchmark signal normalised to the theoretical prediction is added on top of the SM prediction. The benchmark signals correspond to: the non-resonant (NR) DM model with mV=1 TeV and 2 TeV, m χ =1 GeV, a=0.5 and g χ =1; the resonant (R) DM model with m φ =1 TeV and 2 TeV, m χ =10 GeV, λ = 0.2 and y=0.4; and a VLT with a mass of 0.9 TeV.
png (149kB) pdf (19kB)
Figure 03d
Comparison of data and fitted expectations for the ETmiss and the transverse mass of the top-tagged large-R jet and ETmiss system, mT(ETmiss,J), distributions in the signal regions. Other backgrounds in the 1L regions include multi-jet, Z+jets and diboson contributions, while in the 0L regions it is composed of diboson and tt̄ +X contributions. The background-only hypothesis is used in the fit: (a) and (b) including the 1L and 0L DM signal regions as well as the 1L and 0L control regions; (c) 0L DM signal and control regions; (d) 0L VLT signal and control regions. The error bands include statistical and systematic uncertainties. The expected shape of a benchmark signal normalised to the theoretical prediction is added on top of the SM prediction. The benchmark signals correspond to: the non-resonant (NR) DM model with mV=1 TeV and 2 TeV, m χ =1 GeV, a=0.5 and g χ =1; the resonant (R) DM model with m φ =1 TeV and 2 TeV, m χ =10 GeV, λ = 0.2 and y=0.4; and a VLT with a mass of 0.9 TeV.
png (136kB) pdf (18kB)
Figure 04a
95% CL upper limits on the signal cross-section as a function of (a) the V mass in the non-resonant (NR) model, (b) the mass of the scalar particle φ in the resonant (R) model and (c) the VLT mass. LO values for the production cross-section were computed for the non-resonant (resonant) DM production modes assuming m χ =1 GeV, a=0.5 and g χ =1 (m χ =10 GeV, λ = 0.2 and y=0.4).
png (55kB) pdf (16kB)
Figure 04b
95% CL upper limits on the signal cross-section as a function of (a) the V mass in the non-resonant (NR) model, (b) the mass of the scalar particle φ in the resonant (R) model and (c) the VLT mass. LO values for the production cross-section were computed for the non-resonant (resonant) DM production modes assuming m χ =1 GeV, a=0.5 and g χ =1 (m χ =10 GeV, λ = 0.2 and y=0.4).
png (65kB) pdf (16kB)
Figure 04c
95% CL upper limits on the signal cross-section as a function of (a) the V mass in the non-resonant (NR) model, (b) the mass of the scalar particle φ in the resonant (R) model and (c) the VLT mass. LO values for the production cross-section were computed for the non-resonant (resonant) DM production modes assuming m χ =1 GeV, a=0.5 and g χ =1 (m χ =10 GeV, λ = 0.2 and y=0.4).
png (129kB) pdf (16kB)
Figure 05a
The 95% CL upper limit contours on the signal strength σ/σtheory are shown for the non-resonant (NR) and resonant (R) DM production models. Non-resonant model: (a) V mass vs a; (b) V mass vs g χ and (c) V mass vs mass of the DM candidate χ. Resonant model: (d) mass of the scalar φ vs λ; (e) mass of the scalar φ vs y. The solid (dashed) lines correspond to the observed (median expected and corresponding ± 1 σ and ± 2 σ bands) limits for σ/σtheory=1. The predicted cross-sections were computed with MGMCatNLO.
png (260kB) pdf (332kB)
Figure 05b
The 95% CL upper limit contours on the signal strength σ/σtheory are shown for the non-resonant (NR) and resonant (R) DM production models. Non-resonant model: (a) V mass vs a; (b) V mass vs g χ and (c) V mass vs mass of the DM candidate χ. Resonant model: (d) mass of the scalar φ vs λ; (e) mass of the scalar φ vs y. The solid (dashed) lines correspond to the observed (median expected and corresponding ± 1 σ and ± 2 σ bands) limits for σ/σtheory=1. The predicted cross-sections were computed with MGMCatNLO.
png (261kB) pdf (333kB)
Figure 05c
The 95% CL upper limit contours on the signal strength σ/σtheory are shown for the non-resonant (NR) and resonant (R) DM production models. Non-resonant model: (a) V mass vs a; (b) V mass vs g χ and (c) V mass vs mass of the DM candidate χ. Resonant model: (d) mass of the scalar φ vs λ; (e) mass of the scalar φ vs y. The solid (dashed) lines correspond to the observed (median expected and corresponding ± 1 σ and ± 2 σ bands) limits for σ/σtheory=1. The predicted cross-sections were computed with MGMCatNLO.
png (249kB) pdf (335kB)
Figure 05d
The 95% CL upper limit contours on the signal strength σ/σtheory are shown for the non-resonant (NR) and resonant (R) DM production models. Non-resonant model: (a) V mass vs a; (b) V mass vs g χ and (c) V mass vs mass of the DM candidate χ. Resonant model: (d) mass of the scalar φ vs λ; (e) mass of the scalar φ vs y. The solid (dashed) lines correspond to the observed (median expected and corresponding ± 1 σ and ± 2 σ bands) limits for σ/σtheory=1. The predicted cross-sections were computed with MGMCatNLO.
png (228kB) pdf (333kB)
Figure 05e
The 95% CL upper limit contours on the signal strength σ/σtheory are shown for the non-resonant (NR) and resonant (R) DM production models. Non-resonant model: (a) V mass vs a; (b) V mass vs g χ and (c) V mass vs mass of the DM candidate χ. Resonant model: (d) mass of the scalar φ vs λ; (e) mass of the scalar φ vs y. The solid (dashed) lines correspond to the observed (median expected and corresponding ± 1 σ and ± 2 σ bands) limits for σ/σtheory=1. The predicted cross-sections were computed with MGMCatNLO.
png (264kB) pdf (335kB)
Figure 06a
Expected and observed 95% CL limits from the combination of the single-production channels on (a) the coupling of the T quark to SM particles, cW = √( c2L,W + c2R,W ) assuming a singlet T, corresponding to a B of ≈ 25%; and (b) the absolute value of sinθL, with θL being the mixing angle of a singlet T with the SM top-quark.
png (56kB) pdf (15kB)
Figure 06b
Expected and observed 95% CL limits from the combination of the single-production channels on (a) the coupling of the T quark to SM particles, cW = √( c2L,W + c2R,W ) assuming a singlet T, corresponding to a B of ≈ 25%; and (b) the absolute value of sinθL, with θL being the mixing angle of a singlet T with the SM top-quark.
png (109kB) pdf (15kB)
Tables
Table 01
Overview of the event selections used to define the signal and control regions.
png (59kB) pdf (57kB)
Table 02
Relative effect (in %) of various sources of systematic uncertainty on the predicted background yields in the signal regions used for the dark-matter search, obtained after the fit to data. Individual sources of uncertainties are correlated, and their sum in quadrature is not necessarily equal to the total background uncertainty.
png (30kB) pdf (35kB)
Table 03
Relative effect (in %) of various sources of systematic uncertainty on the predicted background yields in the signal region used for the vector-like T-quark search, obtained after the fit to data. Individual sources of uncertainties are correlated, and their sum in quadrature is not necessarily equal to the total background uncertainty.
png (24kB) pdf (35kB)
Table 04
Numbers of events observed in the signal and control regions, together with the estimated SM backgrounds before the fit to data. The uncertainties include statistical and systematic uncertainties. The expected numbers of events for benchmark signals normalised to the theoretical prediction are also shown. The benchmark signals correspond to: the non-resonant (NR) DM model with mV=1 TeV and 2 TeV, m χ =1 GeV, a=0.5 and gχ=1; the resonant (R) DM model with mφ=1 TeV and 2 TeV, m χ =10 GeV, λ = 0.2 and y=0.4; and a VLT with a mass of 0.9 TeV.
png (36kB) pdf (44kB)
Table 05
Numbers of events observed in the signal and control regions used for the non-resonant dark-matter search, together with the estimated SM backgrounds in the fit to data, under the background-only hypothesis. The uncertainties include statistical and systematic uncertainties. The uncertainties in the individual backgrounds are correlated, and do not necessarily add in quadrature to the total background uncertainty.
png (36kB) pdf (36kB)
Table 06
Numbers of events observed in the signal and control regions used for the resonant dark-matter search, together with the estimated SM backgrounds in the fit to data, under the background-only hypothesis. The uncertainties include statistical and systematic uncertainties. The uncertainties in the individual backgrounds are correlated, and do not necessarily add in quadrature to the total background uncertainty.
png (22kB) pdf (35kB)
Table 07
Numbers of events observed in the signal and control regions used for the vector-like T-quark search, together with the estimated SM backgrounds in the fit to data, under the background-only hypothesis. The uncertainties include statistical and systematic uncertainties. The uncertainties in the individual backgrounds are correlated, and do not necessarily add in quadrature to the total background uncertainty.
png (19kB) pdf (34kB)
Auxiliary material
Figure 01a
Comparison of data and SM prediction for the (a) mTWboson and (b) |Δ φ (ℓ,b)| distributions for events satisfying the leptonic channel preselection defined in the text. The expected distributions for the non-resonant model are shown for the new vector particle mass mV=500 GeV and mV=1.5 TeV hypothesis normalised to the SM background predicted yield. The SM backgrounds correspond to the simulation predictions normalised to the theoretical predictions, except the multijet background that is estimated from data. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (221kB) pdf (20kB)
Figure 01b
Comparison of data and SM prediction for the (a) mTWboson and (b) |Δ φ (ℓ,b)| distributions for events satisfying the leptonic channel preselection defined in the text. The expected distributions for the non-resonant model are shown for the new vector particle mass mV=500 GeV and mV=1.5 TeV hypothesis normalised to the SM background predicted yield. The SM backgrounds correspond to the simulation predictions normalised to the theoretical predictions, except the multijet background that is estimated from data. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (274kB) pdf (22kB)
Figure 02a
Comparison of data and SM prediction for the Δ Φmin(ETmiss, calo jets) distributions for events satisfying the hadronic channel preselection defined in the text. The expected distributions for the non-resonant model are shown for (a) the new vector particle mass mV=1 TeV, 2 TeV, and 3 TeV; (b) for the resonant model for the new scalar mass mφ =1 TeV, 3 TeV, and 5 TeV; and (c) and for a VLT T mass of 0.9 TeV, 1.2 TeV, and 1.6 TeV hypothesis normalised to the SM background predicted yield. The SM backgrounds correspond to the simulation predictions normalised to the theoretical predictions, except the multijet background that is estimated from data. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (219kB) pdf (26kB)
Figure 02b
Comparison of data and SM prediction for the Δ Φmin(ETmiss, calo jets) distributions for events satisfying the hadronic channel preselection defined in the text. The expected distributions for the non-resonant model are shown for (a) the new vector particle mass mV=1 TeV, 2 TeV, and 3 TeV; (b) for the resonant model for the new scalar mass mφ =1 TeV, 3 TeV, and 5 TeV; and (c) and for a VLT T mass of 0.9 TeV, 1.2 TeV, and 1.6 TeV hypothesis normalised to the SM background predicted yield. The SM backgrounds correspond to the simulation predictions normalised to the theoretical predictions, except the multijet background that is estimated from data. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (220kB) pdf (26kB)
Figure 02c
Comparison of data and SM prediction for the Δ Φmin(ETmiss, calo jets) distributions for events satisfying the hadronic channel preselection defined in the text. The expected distributions for the non-resonant model are shown for (a) the new vector particle mass mV=1 TeV, 2 TeV, and 3 TeV; (b) for the resonant model for the new scalar mass mφ =1 TeV, 3 TeV, and 5 TeV; and (c) and for a VLT T mass of 0.9 TeV, 1.2 TeV, and 1.6 TeV hypothesis normalised to the SM background predicted yield. The SM backgrounds correspond to the simulation predictions normalised to the theoretical predictions, except the multijet background that is estimated from data. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (219kB) pdf (26kB)
Figure 03a
Comparison of data and SM prediction for the Δ Φ(ETmiss, J) distributions for events satisfying the hadronic channel preselection defined in the text. The expected distributions for the non-resonant model are shown for (a) the new vector particle mass mV=1 TeV, 2 TeV, and 3 TeV (a); (b) the resonant model for the new scalar mass mφ =1 TeV, 3 TeV, and 5 TeV; and (c) for a VLT T mass of 0.9 TeV, 1.2 TeV, and 1.6 TeV hypothesis normalised to the SM background predicted yield. The SM backgrounds correspond to the simulation predictions normalised to the theoretical predictions, except the multijet background that is estimated from data. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (190kB) pdf (23kB)
Figure 03b
Comparison of data and SM prediction for the Δ Φ(ETmiss, J) distributions for events satisfying the hadronic channel preselection defined in the text. The expected distributions for the non-resonant model are shown for (a) the new vector particle mass mV=1 TeV, 2 TeV, and 3 TeV (a); (b) the resonant model for the new scalar mass mφ =1 TeV, 3 TeV, and 5 TeV; and (c) for a VLT T mass of 0.9 TeV, 1.2 TeV, and 1.6 TeV hypothesis normalised to the SM background predicted yield. The SM backgrounds correspond to the simulation predictions normalised to the theoretical predictions, except the multijet background that is estimated from data. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (190kB) pdf (23kB)
Figure 03c
Comparison of data and SM prediction for the Δ Φ(ETmiss, J) distributions for events satisfying the hadronic channel preselection defined in the text. The expected distributions for the non-resonant model are shown for (a) the new vector particle mass mV=1 TeV, 2 TeV, and 3 TeV (a); (b) the resonant model for the new scalar mass mφ =1 TeV, 3 TeV, and 5 TeV; and (c) for a VLT T mass of 0.9 TeV, 1.2 TeV, and 1.6 TeV hypothesis normalised to the SM background predicted yield. The SM backgrounds correspond to the simulation predictions normalised to the theoretical predictions, except the multijet background that is estimated from data. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (189kB) pdf (23kB)
Figure 04a
Comparison of data and SM prediction for the Ω = (ETmiss - pT(J))/(ETmiss + pT(J)) distributions for events satisfying the hadronic channel preselection defined in the text. The expected distributions for the non-resonant model are shown for (a) the new vector particle mass mV=1 TeV, 2 TeV, and 3 TeV; (b) the resonant model for the new scalar mass mφ =1 TeV, 3 TeV, and 5 TeV; and (c) for a VLT T mass of 0.9 TeV, 1.2 TeV, and 1.6 TeV hypothesis normalised to the SM background predicted yield. The SM backgrounds correspond to the simulation predictions normalised to the theoretical predictions, except the multijet background that is estimated from data. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (216kB) pdf (26kB)
Figure 04b
Comparison of data and SM prediction for the Ω = (ETmiss - pT(J))/(ETmiss + pT(J)) distributions for events satisfying the hadronic channel preselection defined in the text. The expected distributions for the non-resonant model are shown for (a) the new vector particle mass mV=1 TeV, 2 TeV, and 3 TeV; (b) the resonant model for the new scalar mass mφ =1 TeV, 3 TeV, and 5 TeV; and (c) for a VLT T mass of 0.9 TeV, 1.2 TeV, and 1.6 TeV hypothesis normalised to the SM background predicted yield. The SM backgrounds correspond to the simulation predictions normalised to the theoretical predictions, except the multijet background that is estimated from data. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (215kB) pdf (26kB)
Figure 04c
Comparison of data and SM prediction for the Ω = (ETmiss - pT(J))/(ETmiss + pT(J)) distributions for events satisfying the hadronic channel preselection defined in the text. The expected distributions for the non-resonant model are shown for (a) the new vector particle mass mV=1 TeV, 2 TeV, and 3 TeV; (b) the resonant model for the new scalar mass mφ =1 TeV, 3 TeV, and 5 TeV; and (c) for a VLT T mass of 0.9 TeV, 1.2 TeV, and 1.6 TeV hypothesis normalised to the SM background predicted yield. The SM backgrounds correspond to the simulation predictions normalised to the theoretical predictions, except the multijet background that is estimated from data. The error bands include statistical and systematic uncertainties. The last bin contains the overflow events.
png (214kB) pdf (26kB)
Figure 05a
Comparison of the observed data with the fitted background in the control and signal regions. The background only hypothesis is used in the fit. The error bands include statistical and systematic uncertainties.
png (129kB) pdf (18kB)
Figure 05b
Comparison of the observed data with the fitted background in the control and signal regions. The background only hypothesis is used in the fit. The error bands include statistical and systematic uncertainties.
png (155kB) pdf (18kB)
Figure 05c
Comparison of the observed data with the fitted background in the control and signal regions. The background only hypothesis is used in the fit. The error bands include statistical and systematic uncertainties.
png (153kB) pdf (18kB)
Figure 06
Selection efficiency for the different signals and channels considered in the present search. The error bands include statistical uncertainties.
png (55kB) pdf (15kB)
Table 01
Cut flow in the leptonic channel for two DM non-resonant signal benchmarks. The relative fraction of events with respect to the total number of generated events is shown in [%].
png (20kB) pdf (44kB)
Table 02
Cut flow in the hadronic channel for two DM non-resonant signal benchmarks. The relative fraction of events with respect to the total number of generated events is shown in [%]. The ETmiss > 200 GeV and lepton veto requirements are applied.
png (18kB) pdf (48kB)
Table 03
Cut flow in the hadronic channel for two DM resonant signal benchmarks. The relative fraction of events with respect to the total number of generated events is shown in [%]. The ETmiss > 200 GeV and lepton veto requirements are applied.
png (18kB) pdf (48kB)
Table 04
Cut flow in the hadronic channel for two VLT signal benchmarks. The relative fraction of events with respect to the total number of generated events is shown in [%]. The ETmiss > 200 GeV and lepton veto requirements are applied.
png (20kB) pdf (46kB)