Lowest-order Feynman diagrams for (a) gluon-gluon fusion and b-associated production in the (b) four-flavour and (c) five-flavour schemes of a neutral MSSM Higgs boson. Feynman diagram for Drell-Yan production of a Z′ boson at lowest order (d).
Lowest-order Feynman diagrams for (a) gluon-gluon fusion and b-associated production in the (b) four-flavour and (c) five-flavour schemes of a neutral MSSM Higgs boson. Feynman diagram for Drell-Yan production of a Z′ boson at lowest order (d).
Lowest-order Feynman diagrams for (a) gluon-gluon fusion and b-associated production in the (b) four-flavour and (c) five-flavour schemes of a neutral MSSM Higgs boson. Feynman diagram for Drell-Yan production of a Z′ boson at lowest order (d).
Lowest-order Feynman diagrams for (a) gluon-gluon fusion and b-associated production in the (b) four-flavour and (c) five-flavour schemes of a neutral MSSM Higgs boson. Feynman diagram for Drell-Yan production of a Z′ boson at lowest order (d).
The distributions of (a) m T(ℓ,E Tmiss) in the τlepτhad channel and (b) Δφ(τhad-vis,1, τhad-vis,2) for the τhadτhad channel for the inclusive selection with the criterion for the variable displayed removed. The label "Others" in (b) refers to contributions due to diboson, Z(→ℓℓ)+jets and W(→ℓν)+jets production. Bins have a varying size and overflows are included in the last bin of the distribution on the left.
The distributions of (a) m T(ℓ,E Tmiss) in the τlepτhad channel and (b) Δφ(τhad-vis,1, τhad-vis,2) for the τhadτhad channel for the inclusive selection with the criterion for the variable displayed removed. The label "Others" in (b) refers to contributions due to diboson, Z(→ℓℓ)+jets and W(→ℓν)+jets production. Bins have a varying size and overflows are included in the last bin of the distribution on the left.
The distributions of m Ttot in (a) the τlepτhad channel W+jets control region, (b) the tanti-t validation region of the τlepτhad channel, (c) the τhadτhad channel b-veto same-sign validation region and (d) the τhadτhad channel b-tag same-sign validation region. The various control and validation regions are defined in Table 1. The data are compared to the background prediction and a hypothetical MSSM H/A→ττ signal (mA = 500GeV and tanβ = 20). The Monte Carlo statistics of the signal is limited in the background-dominated regions. The label "Others" in (c) and (d) refers to contributions due to diboson, Z(→ℓℓ)+jets and W(→ℓν)+jets production. The background uncertainty includes statistical and systematic uncertainties. The bins have a varying size and overflows are included in the last bin of the distributions.
The distributions of m Ttot in (a) the τlepτhad channel W+jets control region, (b) the tanti-t validation region of the τlepτhad channel, (c) the τhadτhad channel b-veto same-sign validation region and (d) the τhadτhad channel b-tag same-sign validation region. The various control and validation regions are defined in Table 1. The data are compared to the background prediction and a hypothetical MSSM H/A→ττ signal (mA = 500GeV and tanβ = 20). The Monte Carlo statistics of the signal is limited in the background-dominated regions. The label "Others" in (c) and (d) refers to contributions due to diboson, Z(→ℓℓ)+jets and W(→ℓν)+jets production. The background uncertainty includes statistical and systematic uncertainties. The bins have a varying size and overflows are included in the last bin of the distributions.
The distributions of m Ttot in (a) the τlepτhad channel W+jets control region, (b) the tanti-t validation region of the τlepτhad channel, (c) the τhadτhad channel b-veto same-sign validation region and (d) the τhadτhad channel b-tag same-sign validation region. The various control and validation regions are defined in Table 1. The data are compared to the background prediction and a hypothetical MSSM H/A→ττ signal (mA = 500GeV and tanβ = 20). The Monte Carlo statistics of the signal is limited in the background-dominated regions. The label "Others" in (c) and (d) refers to contributions due to diboson, Z(→ℓℓ)+jets and W(→ℓν)+jets production. The background uncertainty includes statistical and systematic uncertainties. The bins have a varying size and overflows are included in the last bin of the distributions.
The distributions of m Ttot in (a) the τlepτhad channel W+jets control region, (b) the tanti-t validation region of the τlepτhad channel, (c) the τhadτhad channel b-veto same-sign validation region and (d) the τhadτhad channel b-tag same-sign validation region. The various control and validation regions are defined in Table 1. The data are compared to the background prediction and a hypothetical MSSM H/A→ττ signal (mA = 500GeV and tanβ = 20). The Monte Carlo statistics of the signal is limited in the background-dominated regions. The label "Others" in (c) and (d) refers to contributions due to diboson, Z(→ℓℓ)+jets and W(→ℓν)+jets production. The background uncertainty includes statistical and systematic uncertainties. The bins have a varying size and overflows are included in the last bin of the distributions.
The distribution of m Ttot for the b-veto category of the (a) τlepτhad and (b) τhadτhad channels, the b-tag category of the (c) τlepτhad and (d) τhadτhad channels, and the inclusive category of the (e) τlepτhad and (f) τhadτhad channels. The label "Others" in (b), (d) and (f) refers to contributions due to diboson, Z(→ℓℓ)+jets and W(→ℓν)+jets production. For the b-veto and b-tag categories, the binning displayed is that entering into the statistical fit discussed in Section 7, while the predictions and uncertainties for the background and signal processes are obtained from the fit under the hypothesis of no signal. The inclusive category distributions are shown before any statistical fit. Overflows are included in the last bin of the distributions.
The distribution of m Ttot for the b-veto category of the (a) τlepτhad and (b) τhadτhad channels, the b-tag category of the (c) τlepτhad and (d) τhadτhad channels, and the inclusive category of the (e) τlepτhad and (f) τhadτhad channels. The label "Others" in (b), (d) and (f) refers to contributions due to diboson, Z(→ℓℓ)+jets and W(→ℓν)+jets production. For the b-veto and b-tag categories, the binning displayed is that entering into the statistical fit discussed in Section 7, while the predictions and uncertainties for the background and signal processes are obtained from the fit under the hypothesis of no signal. The inclusive category distributions are shown before any statistical fit. Overflows are included in the last bin of the distributions.
The distribution of m Ttot for the b-veto category of the (a) τlepτhad and (b) τhadτhad channels, the b-tag category of the (c) τlepτhad and (d) τhadτhad channels, and the inclusive category of the (e) τlepτhad and (f) τhadτhad channels. The label "Others" in (b), (d) and (f) refers to contributions due to diboson, Z(→ℓℓ)+jets and W(→ℓν)+jets production. For the b-veto and b-tag categories, the binning displayed is that entering into the statistical fit discussed in Section 7, while the predictions and uncertainties for the background and signal processes are obtained from the fit under the hypothesis of no signal. The inclusive category distributions are shown before any statistical fit. Overflows are included in the last bin of the distributions.
The distribution of m Ttot for the b-veto category of the (a) τlepτhad and (b) τhadτhad channels, the b-tag category of the (c) τlepτhad and (d) τhadτhad channels, and the inclusive category of the (e) τlepτhad and (f) τhadτhad channels. The label "Others" in (b), (d) and (f) refers to contributions due to diboson, Z(→ℓℓ)+jets and W(→ℓν)+jets production. For the b-veto and b-tag categories, the binning displayed is that entering into the statistical fit discussed in Section 7, while the predictions and uncertainties for the background and signal processes are obtained from the fit under the hypothesis of no signal. The inclusive category distributions are shown before any statistical fit. Overflows are included in the last bin of the distributions.
The distribution of m Ttot for the b-veto category of the (a) τlepτhad and (b) τhadτhad channels, the b-tag category of the (c) τlepτhad and (d) τhadτhad channels, and the inclusive category of the (e) τlepτhad and (f) τhadτhad channels. The label "Others" in (b), (d) and (f) refers to contributions due to diboson, Z(→ℓℓ)+jets and W(→ℓν)+jets production. For the b-veto and b-tag categories, the binning displayed is that entering into the statistical fit discussed in Section 7, while the predictions and uncertainties for the background and signal processes are obtained from the fit under the hypothesis of no signal. The inclusive category distributions are shown before any statistical fit. Overflows are included in the last bin of the distributions.
The distribution of m Ttot for the b-veto category of the (a) τlepτhad and (b) τhadτhad channels, the b-tag category of the (c) τlepτhad and (d) τhadτhad channels, and the inclusive category of the (e) τlepτhad and (f) τhadτhad channels. The label "Others" in (b), (d) and (f) refers to contributions due to diboson, Z(→ℓℓ)+jets and W(→ℓν)+jets production. For the b-veto and b-tag categories, the binning displayed is that entering into the statistical fit discussed in Section 7, while the predictions and uncertainties for the background and signal processes are obtained from the fit under the hypothesis of no signal. The inclusive category distributions are shown before any statistical fit. Overflows are included in the last bin of the distributions.
The observed and expected 95% CL upper limits on the production cross section times branching fraction of a scalar particle are shown for the combination of the τlepτhad and the τhadτhad channels. The production mechanism of H/A→ττ is assumed to be (a) gluon-gluon fusion or (b) b-associated production. For comparison, the expected limits for the individual channels, τlepτhad and τhadτhad, are shown as well. The observed and expected 95% CL limits on tanβ as a function of mA are shown in (c) for the MSSM mhmod+ scenario and (d) for the hMSSM scenario. For comparison, the expected limits from the individual channels, τlepτhad and τhadτhad, are given in (c), while the observed and expected limits from the ATLAS Run-1 analysis in Ref. [25] are shown in (d). Dashed lines of constant mh and mH values are shown in red and blue, respectively.
The observed and expected 95% CL upper limits on the production cross section times branching fraction of a scalar particle are shown for the combination of the τlepτhad and the τhadτhad channels. The production mechanism of H/A→ττ is assumed to be (a) gluon-gluon fusion or (b) b-associated production. For comparison, the expected limits for the individual channels, τlepτhad and τhadτhad, are shown as well. The observed and expected 95% CL limits on tanβ as a function of mA are shown in (c) for the MSSM mhmod+ scenario and (d) for the hMSSM scenario. For comparison, the expected limits from the individual channels, τlepτhad and τhadτhad, are given in (c), while the observed and expected limits from the ATLAS Run-1 analysis in Ref. [25] are shown in (d). Dashed lines of constant mh and mH values are shown in red and blue, respectively.
The observed and expected 95% CL upper limits on the production cross section times branching fraction of a scalar particle are shown for the combination of the τlepτhad and the τhadτhad channels. The production mechanism of H/A→ττ is assumed to be (a) gluon-gluon fusion or (b) b-associated production. For comparison, the expected limits for the individual channels, τlepτhad and τhadτhad, are shown as well. The observed and expected 95% CL limits on tanβ as a function of mA are shown in (c) for the MSSM mhmod+ scenario and (d) for the hMSSM scenario. For comparison, the expected limits from the individual channels, τlepτhad and τhadτhad, are given in (c), while the observed and expected limits from the ATLAS Run-1 analysis in Ref. [25] are shown in (d). Dashed lines of constant mh and mH values are shown in red and blue, respectively.
The observed and expected 95% CL upper limits on the production cross section times branching fraction of a scalar particle are shown for the combination of the τlepτhad and the τhadτhad channels. The production mechanism of H/A→ττ is assumed to be (a) gluon-gluon fusion or (b) b-associated production. For comparison, the expected limits for the individual channels, τlepτhad and τhadτhad, are shown as well. The observed and expected 95% CL limits on tanβ as a function of mA are shown in (c) for the MSSM mhmod+ scenario and (d) for the hMSSM scenario. For comparison, the expected limits from the individual channels, τlepτhad and τhadτhad, are given in (c), while the observed and expected limits from the ATLAS Run-1 analysis in Ref. [25] are shown in (d). Dashed lines of constant mh and mH values are shown in red and blue, respectively.
The 95% CL upper limit on the cross section times branching fraction for a Z'→ττ in (a) the Sequential Standard Model and 95% CL exclusion on (b) the SFM parameter space , overlaid with indirect limits at 95% CL from fits to electroweak precision measurements [125], lepton flavour violation [126], CKM unitarity [127] and Z-pole measurements [37].
The 95% CL upper limit on the cross section times branching fraction for a Z'→ττ in (a) the Sequential Standard Model and 95% CL exclusion on (b) the SFM parameter space , overlaid with indirect limits at 95% CL from fits to electroweak precision measurements [125], lepton flavour violation [126], CKM unitarity [127] and Z-pole measurements [37].
The observed and expected 95% CL limits on tanβ as a function of mA for the combination of τlepτhad and τhadτhad channels in the MSSM scenarios indicated with 3.2 fb-1 of √s = 13 TeV data. These MSSM scenarios are defined in Ref. [18]. The "light stop" scenario is modified with respect to its definition in this refenence, by setting the gaugino mass parameters at M1 = 340 GeV, M2 = 400 GeV and the Higgsino mass parameter at μ = 400 GeV.
The observed and expected 95% CL limits on tanβ as a function of mA for the combination of τlepτhad and τhadτhad channels in the MSSM scenarios indicated with 3.2 fb-1 of √s = 13 TeV data. These MSSM scenarios are defined in Ref. [18]. The "light stop" scenario is modified with respect to its definition in this refenence, by setting the gaugino mass parameters at M1 = 340 GeV, M2 = 400 GeV and the Higgsino mass parameter at μ = 400 GeV.
The observed and expected 95% CL limits on tanβ as a function of mA for the combination of τlepτhad and τhadτhad channels in the MSSM scenarios indicated with 3.2 fb-1 of √s = 13 TeV data. These MSSM scenarios are defined in Ref. [18]. The "light stop" scenario is modified with respect to its definition in this refenence, by setting the gaugino mass parameters at M1 = 340 GeV, M2 = 400 GeV and the Higgsino mass parameter at μ = 400 GeV.
The observed and expected 95% CL limits on tanβ as a function of mA for the combination of τlepτhad and τhadτhad channels in the MSSM scenarios indicated with 3.2 fb-1 of √s = 13 TeV data. These MSSM scenarios are defined in Ref. [18]. The "light stop" scenario is modified with respect to its definition in this refenence, by setting the gaugino mass parameters at M1 = 340 GeV, M2 = 400 GeV and the Higgsino mass parameter at μ = 400 GeV.
The observed and expected 95% CL limits on tanβ as a function of mA for the combination of τlepτhad and τhadτhad channels in the MSSM scenarios indicated with 3.2 fb-1 of √s = 13 TeV data. These MSSM scenarios are defined in Ref. [18]. The "light stop" scenario is modified with respect to its definition in this refenence, by setting the gaugino mass parameters at M1 = 340 GeV, M2 = 400 GeV and the Higgsino mass parameter at μ = 400 GeV.
The observed and expected 95% CL limits on tanβ as a function of mA for the combination of τlepτhad and τhadτhad channels in the MSSM scenarios indicated with 3.2 fb-1 of √s = 13 TeV data. These MSSM scenarios are defined in Ref. [18]. The "light stop" scenario is modified with respect to its definition in this refenence, by setting the gaugino mass parameters at M1 = 340 GeV, M2 = 400 GeV and the Higgsino mass parameter at μ = 400 GeV.
The observed and expected 95% CL limits on tanβ as a function of mA for the combination of τlepτhad and τhadτhad channels in the MSSM scenarios indicated with 3.2 fb-1 of √s = 13 TeV data. The content for (a) and (b) is the same as in Figures (???)(d) and 6(b), respectively.
The observed and expected 95% CL limits on tanβ as a function of mA for the combination of τlepτhad and τhadτhad channels in the MSSM scenarios indicated with 3.2 fb-1 of √s = 13 TeV data. The content for (a) and (b) is the same as in Figures (???)(d) and 6(b), respectively.
The observed and expected 95% CL lower limits on tanβ as a function of mA for the τlepτhad and τhadτhad channels, split into the b-veto and b-tag categories, in the mhmod+ scenario with 3.2 fb-1 of √s = 13 TeV data.
The observed and expected 95% CL lower limits on tanβ as a function of mA for the τlepτhad and τhadτhad channels, split into the b-veto and b-tag categories, in the mhmod+ scenario with 3.2 fb-1 of √s = 13 TeV data.
The observed and expected 95% CL lower limits on tanβ as a function of mA for the τlepτhad and τhadτhad channels combined, with the ± 1σ uncertainties on the MSSM Higgs boson production cross section [79] displayed on the observed, in the mhmod+ scenario with 3.2 fb-1 of √s = 13 TeV data.
A summary of the impact of the couplings on the Z′ acceptance times efficiency with respect to the SSM for models with altered fermion couplings or decay width, separately for the τlepτhad and τhadτhad channels. The most extreme impact on the acceptance is seen for models that couple only to left-handed or right-handed tau leptons: Z′L and Z′R, respectively. In each case the decay width is taken to be the same as for the SSM. For the decay width, the effect of a narrower decay width Z′narrow (Γ/mZ′ = 1%) or a wider decay width of Z′wide (Γ/mZ′ = 20%), compared to the SSM (Γ/mZ′ ≈ 3%), are shown.
Signal production cross section times branching fraction for Z′SFM, σBSFM , divided by σBSSM (left) and acceptance times efficiency for Z′SFM, AvarepsilonSFM, divided by AvarepsilonSSM for the τhadτhad (middle left), τμτhad (middle right) and τeτhad (right) channels, as a function of sin2φ and mZ′.
Description of the control regions used in the τlepτhad and τhadτhad channels.
Observed number of events and background predictions in the b-tag and b-veto categories for the τeτhad, τμτhad and τhadτhad channels. The background predictions and uncertainties are obtained from the statistical procedure discussed in Section 7. In the τlepτhad channel, the processes other than "Jet → ℓ, τhad-vis fakes" require a true hadronically decaying τ lepton or an electron or muon misidentified as a τhad-vis. The expected signal yields for the mhmod+ scenario are shown for comparison.
Fractional impact of the most important sources of systematic uncertainty on the total uncertainty of the signal strength, for (top) the MSSM signal hypothesis of mA=500 GeV, tanβ=20, (bottom) the Z′SSM signal hypothesis of mZ′=1.75 TeV. For each source of uncertainty, F± = ±σ2source / σ2total is defined as the positive (negative) fractional contribution to the signal strength uncertainty.
The 95% CL lower limits in the mA–tanβ space in the mhmod+ scenario. The quoted limits here are tanβ values. Higher values than those quoted are excluded.
The 95% CL lower limits in the mA–tanβ space in the hMSSM scenario. The quoted limits here are tanβ values. Higher values than those quoted are excluded.
The 95% CL upper limits for the production cross section times the branching ratio to a ττ pair of a scalar particle produced via b-associated production. The limit values are in pb. The limits are valid under the assumption that the width of the particle is negligible with respect to the m Ttot mass resolution.
The 95% CL upper limits for the production cross section times the branching ratio to a ττ pair of a scalar particle produced via gluon-gluon fusion. The limit values are in pb. The limits are valid under the assumption that the width of the particle is negligible with respect to the m Ttot mass resolution.
The 95% CL upper limits for the production cross section times the branching ratio to a ττ pair of a scalar particle produced both via b-associated production and gluon-gluon fusion. The columns show the Higgs boson mass, mH/A, versus the fraction of the b-associated production of the total production cross section, fb, for mH/A ≤ 500,GeV. The limit values are in pb and they are valid under the assumption that the width of the particle is negligible with respect to the m Ttot mass resolution.
The 95% CL upper limits for the production cross section times the branching ratio to a ττ pair of a scalar particle produced both via b-associated production and gluon-gluon fusion. The columns show the Higgs boson mass, mH/A, versus the fraction of the b-associated production of the total production cross section, fb, for 500,GeV < mH/A ≤ 1200,GeV. The limit values are in pb and they are valid under the assumption that the width of the particle is negligible with respect to the m Ttot mass resolution.