Additional plots of the ATLAS Exotic physics group

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Hadronic resonance search contours for 95% CL upper limits on the coupling gq as a function of the resonance mass mZ'A for the leptophobic axial-vector Z'A model. The expected limits from each search are indicated by dotted lines. The TLA dijet analysis has two parts, employing different datasets with different selections in the rapidity difference y* as indicated. The dijet+ISR (γ) analysis also has two parts, each using a different trigger strategy, and each further studied in inclusive and b-tagged channels. Two lines are also shown for the di-b-jet search. These are from separate analyses, one which used b-jet triggers and provides the limit at lower mass, and one which used inclusive jet triggers and provides the high mass limit. Coupling values above the solid lines are excluded, as long as the signals are narrow enough to be detected using these searches. The TLA dijet search with |y*| < 0.6 is sensitive up to Γ/mZ' = 7%, the TLA dijet with |y*| < 0.3 and dijet + ISR searches are sensitive up to Γ/mZ' =10%, and the dijet and di-b-jet searches are sensitive up to Γ/mZ' = 15%. The dijet angular analysis is sensitive up to Γ/mZ' = 50%. No limitation in sensitivity arises from large width resonances in the tt̄ resonance analysis. Benchmark width lines are indicated in the canvas. Γ/mZ' = 50% lies beyond the canvas borders.

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Regions in a (mediator-mass, DM-mass) plane excluded at 95% CL by visible and invisible searches, for leptophobic axial-vector mediator simplified models. The exclusions are computed for a DM coupling gχ = 1, quark coupling gq = 0.25, universal to all flavours, and no coupling to leptons. Dashed curves labelled "thermal relic" correspond to combinations of DM and mediator mass values that are consistent with a DM density of Ω h2 = 0.12 and a standard thermal history, as computed in MadDM [Phys. Dark Univ. 26 (2019) 100377, AIP Conf.Proc. 1743 (2016) 1, 060001]. Between the two curves, annihilation processes described by the simplified model deplete Ω h2 to below 0.12. A dotted line indicates the kinematic threshold where the mediator can decay on-shell into DM. Excluded regions that are in tension with the perturbative unitary considerations of [JHEP 02 (2016) 016] are indicated by shading in the upper left corner. The reinterpretation procedure for the TLA analysis follows the procedure recommended by ATLAS in Appendix A of [Phys. Rev. D91 052007 (2015)], while the high-mass dijet and dijet+ISR analyses are reinterpreted following [Phys. Lett. B 769 (2017)].

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Regions in a (mediator-mass, DM-mass) plane excluded at 95% CL by visible and invisible searches, for leptophilic axial-vector mediator simplified models. The exclusions are computed for a DM coupling gχ = 1, quark coupling gq = 0.1, and lepton coupling gl = 0.1, in both cases universal to all flavours. Dashed curves labelled "thermal relic" correspond to combinations of DM and mediator mass values that are consistent with a DM density of Ω h2 = 0.12 and a standard thermal history, as computed in MadDM [Phys. Dark Univ. 26 (2019) 100377, AIP Conf.Proc. 1743 (2016) 1, 060001]. Between the two curves, annihilation processes described by the simplified model deplete Ω h2 to below 0.12. A dotted line indicates the kinematic threshold where the mediator can decay on-shell into DM. Excluded regions that are in tension with the perturbative unitary considerations of [JHEP 02 (2016) 016] are indicated by shading in the upper left corner.

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Regions in a (mediator-mass, DM-mass) plane excluded at 95% CL by dijet, dilepton and ETmiss+X searches, for leptophobic vector mediator simplified models. The exclusions are computed for a DM coupling gχ = 1, quark coupling gq = 0.25, universal to all flavours, and no coupling to leptons. Dashed curves labelled "thermal relic" correspond to combinations of DM and mediator mass values that are consistent with a DM density of Ω h2 = 0.12 and a standard thermal history as computed in MadDM [Phys. Dark Univ. 26 (2019) 100377, AIP Conf.Proc. 1743 (2016) 1, 060001]. Above the curve, annihilation processes described by the simplified model deplete Ω h2 to below 0.12. The dotted line indicates the kinematic threshold where the mediator can decay on-shell into DM. The reinterpretation procedure for the TLA analysis follows the procedure recommended by ATLAS in Appendix A of [Phys. Rev. D91 052007 (2015)], while the high-mass dijet and dijet+ISR analyses are reinterpreted following [Phys. Lett. B 769 (2017)].

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Regions in a (mediator-mass, DM-mass) plane excluded at 95% CL by dijet, dilepton and ETmiss+X searches, for leptophilic vector mediator simplified models. The exclusions are computed for a DM coupling gχ = 1, quark coupling gq = 0.1, and lepton coupling gl = 0.01, in both cases universal to all flavours. Dashed curves labelled "thermal relic" correspond to combinations of DM and mediator mass values that are consistent with a DM density of Ω h2 = 0.12 and a standard thermal history as computed in MadDM [Phys. Dark Univ. 26 (2019) 100377, AIP Conf.Proc. 1743 (2016) 1, 060001]. Between the two dashed curves, annihilation processes described by the simplified model deplete Ω h2 to below 0.12. The dotted line indicates the kinematic threshold where the mediator can decay on-shell into DM.

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A comparison of the inferred limits with the constraints from direct-detection experiments on the spin-dependent WIMP-neutron cross-section in the context of the Z'-like simplified model with axial-vector couplings. The results from this analysis are compared with limits from direct-detection experiments. LHC limits are shown at 95% CL and direct-detection limits at 90% CL. The comparison is valid solely in the context of this model, assuming a mediator width fixed by the dark matter mass, a DM coupling gχ = 1, quark coupling gq = 0.25, and no coupling to leptons. LHC searches and direct-detection experiments exclude the shaded areas. Exclusions of smaller scattering cross-sections do not imply that larger scattering cross-sections are also excluded. The resonance and ETmiss+X exclusion regions represent the union of exclusions from all analyses of that type.

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A comparison of the inferred limits with the constraints from direct-detection experiments on the spin-dependent WIMP-neutron scattering cross-section in the context of the Z'-like simplified model with leptophilic axial-vector couplings. The results from this analysis are compared with limits from the direct-detection experiments. LHC limits are shown at 95% CL and direct-detection limits at 90% CL. The comparison is valid solely in the context of this model, assuming a mediator width fixed by the dark matter mass, a DM coupling gχ = 1, quark coupling gq = 0.1, and lepton coupling gl = 0.1. LHC searches and direct-detection experiments exclude the shaded areas. Exclusions of smaller scattering cross-sections do not imply that larger scattering cross-sections are also excluded. The resonance and ETmiss+X exclusion region represents the union of exclusions from all analyses of that type.

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A comparison of the inferred limits with the constraints from direct-detection experiments on the spin-dependent WIMP-proton cross-section in the context of the Z'-like simplified model with axial-vector couplings. The results from this analysis are compared with limits from direct-detection experiments. LHC limits are shown at 95% CL and direct-detection limits at 90% CL. The comparison is valid solely in the context of this model, assuming a mediator width fixed by the dark matter mass, a DM coupling gχ = 1, quark coupling gq = 0.25, and no coupling to leptons. LHC searches and direct-detection experiments exclude the shaded areas. Exclusions of smaller scattering cross-sections do not imply that larger scattering cross-sections are also excluded. The resonance and ETmiss+X exclusion regions represent the union of exclusions from all analyses of that type.

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A comparison of the inferred limits with the constraints from direct-detection experiments on the spin-independent WIMP-nucleon scattering cross-section in the context of the Z'-like simplified model with leptophilic vector couplings. The results from this analysis are compared with limits from the direct-detection experiments. LHC limits are shown at 95% CL and direct-detection limits at 90% CL. The comparison is valid solely in the context of this model, assuming a mediator width fixed by the dark matter mass, a DM coupling gχ = 1, quark coupling gq = 0.1, and lepton coupling gl = 0.01. LHC searches and direct-detection experiments exclude the shaded areas. Exclusions of smaller scattering cross-sections do not imply that larger scattering cross-sections are also excluded. The resonance and ETmiss+X exclusion region represents the union of exclusions from all analyses of that type.

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Observed 95% CL exclusion contours in the HVT parameter space {gH, gf} for resonances of mass 3, 4, and 5 TeV for the combination of VV, VH, and ℓν/ℓℓ channels. The areas outside the curves are excluded, as are the filled regions which show the constraints from precision EW measurements. Also shown are the parameters for models A and B, where applicable.

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Observed 95% CL exclusion contours in the HVT parameter space {gq, g} for resonances of mass 3, 4, and 5 TeV for the combination of VV, VH, and ℓν/ℓℓ channels. The areas outside the curves are excluded, as are the filled regions which show the constraints from precision EW measurements. Also shown are the parameters for models A and B, where applicable.

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Reach in ctau of ATLAS searches for new phenomena. Only a representative selection of the available results is shown. Green bands indicate 8 TeV data results; yellow (orange) bands indicate 13 TeV data results with partial (full) dataset.

Status of figure: May 2020


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Reach of ATLAS searches for new phenomena other than Supersymmetry. Only a representative selection of the available results is shown. Green bands indicate 8 TeV data results; yellow (orange) bands indicate 13 TeV data results with partial (full) dataset.

Status of figure: May 2020


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Expected (a) and observed (b) $95\%$ exclusion contours at $139\ \mathrm{fb}^{-1}$ in the HVT $\{g_f,\ g_h\}$ coupling space from cross section limits on resonances in the $\ell\nu$ (green) and $\ell\ell$ (blue) final states with masses of 3, 4, and 5 TeV. Regions outside the contours are excluded in each case. Comparison of the upper limiting and predicted cross section values is done following the same methodology as in the $139\ \mathrm{fb}^{-1}$ dilepton anaysis [Phys. Lett. B 796 (2019) 68], matching the resonance width where possible. The $\ell\nu$ channel sets observed upper limits on the coupling of the HVT triplet field to fermions of $|g_{f}|<0.05$, $0.13$, and $0.32$ for pole masses of 3, 4, and 5 TeV respectively, and for $g_h=0$. As a reference, the corresponding limits from the leptonic $\ell\ell + \ell\nu$ combination at $36.1\ \mathrm{fb}^{-1}$ [Phys. Rev. D 98 (2018) 052008] are $|g_{f}|<0.06$, $0.15$, and $0.42$ at the same masses.

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Expected (a) and observed (b) $95\%$ exclusion contours at $139\ \mathrm{fb}^{-1}$ in the HVT $\{g_f,\ g_h\}$ coupling space from cross section limits on resonances in the $\ell\nu$ (green) and $\ell\ell$ (blue) final states with masses of 3, 4, and 5 TeV. Regions outside the contours are excluded in each case. Comparison of the upper limiting and predicted cross section values is done following the same methodology as in the $139\ \mathrm{fb}^{-1}$ dilepton anaysis [Phys. Lett. B 796 (2019) 68], matching the resonance width where possible. The $\ell\nu$ channel sets observed upper limits on the coupling of the HVT triplet field to fermions of $|g_{f}|<0.05$, $0.13$, and $0.32$ for pole masses of 3, 4, and 5 TeV respectively, and for $g_h=0$. As a reference, the corresponding limits from the leptonic $\ell\ell + \ell\nu$ combination at $36.1\ \mathrm{fb}^{-1}$ [Phys. Rev. D 98 (2018) 052008] are $|g_{f}|<0.06$, $0.15$, and $0.42$ at the same masses.

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Expected (a) and observed (b) $95\%$ exclusion contours at $139\ \mathrm{fb}^{-1}$ in the HVT $\{g_l,\ g_q\}$ coupling space from cross section limits on resonances in the $\ell\nu$ (green) and $\ell\ell$ (blue) final states with masses of 3, 4, and 5 TeV. Regions outside the contours are excluded in each case. Comparison of the upper limiting and predicted cross section values is done following the same methodology as in the $139\ \mathrm{fb}^{-1}$ dilepton anaysis [Phys. Lett. B 796 (2019) 68], matching the resonance width where possible.

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Expected (a) and observed (b) $95\%$ exclusion contours at $139\ \mathrm{fb}^{-1}$ in the HVT $\{g_l,\ g_q\}$ coupling space from cross section limits on resonances in the $\ell\nu$ (green) and $\ell\ell$ (blue) final states with masses of 3, 4, and 5 TeV. Regions outside the contours are excluded in each case. Comparison of the upper limiting and predicted cross section values is done following the same methodology as in the $139\ \mathrm{fb}^{-1}$ dilepton anaysis [Phys. Lett. B 796 (2019) 68], matching the resonance width where possible.

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Expected (a) and observed (b) $95\%$ exclusion contours at $139\ \mathrm{fb}^{-1}$ in the HVT $\{g_f,\ g_h\}$ coupling space from cross section limits on resonances in the $\ell\nu$ final state with masses of 3, 4, and 5 TeV [arXiv:1906.05609]. Regions outside the contours are excluded in each case. Comparison of the upper limiting and predicted cross section values is done following the same methodology as in the $139\ \mathrm{fb}^{-1}$ dilepton anaysis [Phys. Lett. B 796 (2019) 68], matching the resonance width where possible. The $\ell\nu$ channel sets observed upper limits on the coupling of the HVT triplet field to fermions of $|g_{f}|<0.05$, $0.13$, and $0.32$ for pole masses of 3, 4, and 5 TeV respectively, and for $g_h=0$. As a reference, the corresponding limits from the leptonic $\ell\ell + \ell\nu$ combination at $36.1\ \mathrm{fb}^{-1}$ [Phys. Rev. D 98 (2018) 052008] are $|g_{f}|<0.06$, $0.15$, and $0.42$ at the same masses.

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Expected (a) and observed (b) $95\%$ exclusion contours at $139\ \mathrm{fb}^{-1}$ in the HVT $\{g_f,\ g_h\}$ coupling space from cross section limits on resonances in the $\ell\nu$ final state with masses of 3, 4, and 5 TeV [arXiv:1906.05609]. Regions outside the contours are excluded in each case. Comparison of the upper limiting and predicted cross section values is done following the same methodology as in the $139\ \mathrm{fb}^{-1}$ dilepton anaysis [Phys. Lett. B 796 (2019) 68], matching the resonance width where possible. The $\ell\nu$ channel sets observed upper limits on the coupling of the HVT triplet field to fermions of $|g_{f}|<0.05$, $0.13$, and $0.32$ for pole masses of 3, 4, and 5 TeV respectively, and for $g_h=0$. As a reference, the corresponding limits from the leptonic $\ell\ell + \ell\nu$ combination at $36.1\ \mathrm{fb}^{-1}$ [Phys. Rev. D 98 (2018) 052008] are $|g_{f}|<0.06$, $0.15$, and $0.42$ at the same masses.

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This and previous plot versions
Expected (a) and observed (b) $95\%$ exclusion contours at $139\ \mathrm{fb}^{-1}$ in the HVT $\{g_l,\ g_q\}$ coupling space from cross section limits on resonances in the $\ell\nu$ final state with masses of 3, 4, and 5 TeV [arXiv:1906.05609]. Regions outside the contours are excluded in each case. Comparison of the upper limiting and predicted cross section values is done following the same methodology as in the $139\ \mathrm{fb}^{-1}$ dilepton anaysis [Phys. Lett. B 796 (2019) 68], matching the resonance width where possible.

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Expected (a) and observed (b) $95\%$ exclusion contours at $139\ \mathrm{fb}^{-1}$ in the HVT $\{g_l,\ g_q\}$ coupling space from cross section limits on resonances in the $\ell\nu$ final state with masses of 3, 4, and 5 TeV [arXiv:1906.05609]. Regions outside the contours are excluded in each case. Comparison of the upper limiting and predicted cross section values is done following the same methodology as in the $139\ \mathrm{fb}^{-1}$ dilepton anaysis [Phys. Lett. B 796 (2019) 68], matching the resonance width where possible.

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Observed (filled area) and expected (dashed line) 95% CL exclusion in the plane of BR(B → Hb) versus BR(B → Wt), for different values of the vector-like B quark mass for the various analyses contributing to the BB̄ combination, assuming that the SM branching ratios sum to unity. In the figure, the branching ratio is denoted ``BR". The grey (light shaded) area corresponds to the unphysical region where the sum of branching ratios exceeds unity, or is smaller than zero. The default branching ratio values from the Protos event generator [1] for the weak-isospin singlet, (T,B) and (B,Y) doublet cases are shown as plain circle, cross and star symbols, respectively. A description of the combination and individual results can be found in arXiv:1808.02343.

[1] J. A. Aguilar-Saavedra, PROTOS, a PROgram for TOp Simulations, http://jaguilar.web.cern.ch/jaguilar/protos/

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Observed (filled area) and expected (dashed line) 95% CL exclusion in the plane of BR(T → Ht) versus BR(T → Wb), for different values of the vector-like T quark mass for the various analyses contributing to the TT̄ combination, assuming that the SM branching ratios sum to unity. In the figure, the branching ratio is denoted ``BR". The grey (light shaded) area corresponds to the unphysical region where the sum of branching ratios exceeds unity, or is smaller than zero. The default branching ratio values from the Protos event generator [1] for the weak-isospin singlet and doublet cases are shown as plain circle and star symbols, respectively. A description of the combination and individual results can be found in arXiv:1808.02343.

[1] J. A. Aguilar-Saavedra, PROTOS, a PROgram for TOp Simulations, http://jaguilar.web.cern.ch/jaguilar/protos/

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ATLAS Collaboration, 2024