HEPData Search

Showing 10 of 40 results

Version 2

HistFactory
Search for squarks and gluinos in final states with one isolated lepton, jets, and missing transverse momentum at $\sqrt{s}=13$ TeV with the ATLAS detector

The ATLAS collaboration Aad, Georges ; Abbott, Brad ; Abbott, Dale Charles ; et al.

Eur.Phys.J.C 81 (2021) 600, 2021.

Inspire Record 1839446 DOI 10.17182/hepdata.97041

The results of a search for gluino and squark pair production with the pairs decaying via the lightest charginos into a final state consisting of two $W$ bosons, the lightest neutralinos ($\tilde\chi^0_1$), and quarks, are presented. The signal is characterised by the presence of a single charged lepton ($e^{\pm}$ or $\mu^{\pm}$) from a $W$ boson decay, jets, and missing transverse momentum. The analysis is performed using 139 fb$^{-1}$ of proton-proton collision data taken at a centre-of-mass energy $\sqrt{s}=13$ TeV delivered by the Large Hadron Collider and recorded by the ATLAS experiment. No statistically significant excess of events above the Standard Model expectation is found. Limits are set on the direct production of squarks and gluinos in simplified models. Masses of gluino (squark) up to 2.2 TeV (1.4 TeV) are excluded at 95% confidence level for a light $\tilde\chi^0_1$.

292 data tables match query

Post-fit N-1 SR2JBV

Post-fit $m_{T}$ distribution in the SR 2J b-veto N-1 region. N-1 refers to all cuts except for the requirement on $m_T$ being applied. Uncertainties include statistical and systematic uncertainties. The value 9999 is used as a placeholder for infinity.

Post-fit N-1 SR2JBV

Post-fit N-1 SR2JBT

Post-fit $m_{T}$ distribution in the SR 2J b-tag N-1 region. N-1 refers to all cuts except for the requirement on $m_T$ being applied. Uncertainties include statistical and systematic uncertainties. The value 9999 is used as a placeholder for infinity.

More…

rivet Analysis
Search for supersymmetry in events with three leptons and missing transverse momentum in sqrt(s) = 7 TeV pp collisions with the ATLAS detector

The ATLAS collaboration Aad, Georges ; Abbott, Brad ; Abdallah, Jalal ; et al.

Phys.Rev.Lett. 108 (2012) 261804, 2012.

Inspire Record 1112263 DOI 10.17182/hepdata.58756

A search for the weak production of charginos and neutralinos into final states with three electrons or muons and missing transverse momentum is presented. The analysis uses 2.06 fb^-1 of sqrt(s) = 7 TeV proton-proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with standard model expectations in two signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserving phenomenological minimal supersymmetric and simplified models. For the simplified models, degenerate lightest chargino and next-to-lightest neutralino masses up to 300 GeV are excluded for mass differences from the lightest neutralino up to 300 GeV.

0 data tables match query

rivet Analysis
Search for R-parity-violating supersymmetry in events with four or more leptons in sqrt(s) = 7 TeV pp collisions with the ATLAS detector

The ATLAS collaboration Aad, Georges ; Abajyan, Tatevik ; Abbott, Brad ; et al.

JHEP 12 (2012) 124, 2012.

Inspire Record 1190891 DOI 10.17182/hepdata.59932

A search for new phenomena in final states with four or more leptons (electrons or muons) is presented. The analysis is based on 4.7 fb^-1 of sqrt(s) = 7 TeV proton-proton collisions delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in two signal regions: one that requires moderate values of missing transverse momentum and another that requires large effective mass. The results are interpreted in a simplified model of R-parity-violating supersymmetry in which a 95% CL exclusion region is set for charged wino masses up to 540 GeV. In an R-parity-violating MSUGRA/CMSSM model, values of m_1/2 up to 820 GeV are excluded for 10<tan(beta)<40.

1 data table match query

Table 8

MSUGRA/CMSSM Model (1) Number of generated events (2) Cross-section [pb] (3) CL_{S} [%] for SR1 (4) Acceptance [%] for SR1 (5) Efficiency [%] for SR1 (6) Uncertainty (not including MC statistics) for SR1 (7) CL_{S} [%] for SR2 (8) Acceptance [%] for SR2 (9) Efficiency [%] for SR2 (10) Uncertainty (not including MC statistics) for SR2.

Constraints on spin-0 dark matter mediators and invisible Higgs decays using ATLAS 13 TeV $pp$ collision data with two top quarks and missing transverse momentum in the final state

The ATLAS collaboration Aad, Georges ; Abbott, Braden Keim ; Abbott, D.C. ; et al.

Eur.Phys.J.C 83 (2023) 503, 2023.

Inspire Record 2180393 DOI 10.17182/hepdata.129623

This paper presents a statistical combination of searches targeting final states with two top quarks and invisible particles, characterised by the presence of zero, one or two leptons, at least one jet originating from a $b$-quark and missing transverse momentum. The analyses are searches for phenomena beyond the Standard Model consistent with the direct production of dark matter in $pp$ collisions at the LHC, using 139 fb$^{-\text{1}}$ of data collected with the ATLAS detector at a centre-of-mass energy of 13 TeV. The results are interpreted in terms of simplified dark matter models with a spin-0 scalar or pseudoscalar mediator particle. In addition, the results are interpreted in terms of upper limits on the Higgs boson invisible branching ratio, where the Higgs boson is produced according to the Standard Model in association with a pair of top quarks. For scalar (pseudoscalar) dark matter models, with all couplings set to unity, the statistical combination extends the mass range excluded by the best of the individual channels by 50 (25) GeV, excluding mediator masses up to 370 GeV. In addition, the statistical combination improves the expected coupling exclusion reach by 14% (24%), assuming a scalar (pseudoscalar) mediator mass of 10 GeV. An upper limit on the Higgs boson invisible branching ratio of 0.38 (0.30$^{+\text{0.13}}_{-\text{0.09}}$) is observed (expected) at 95% confidence level.

33 data tables match query

Figure 2b

Representative fit distribution in the signal region for the tt1L analysis: each bin of such distribution corresponds to a single SR included in the fit. 'Other' includes contributions from $t\bar{t}W$, $tZ$, $tWZ$ and $t\bar{t}$ (semileptonic) processes. The total uncertainty in the SM expectation is represented with hatched bands and the expected distributions for selected signal models are shown as dashed lines.

Figure 2c

Representative fit distribution in the same flavour leptons signal region for the tt2L analysis: each bin of such distribution, starting from the red arrow, corresponds to a single SR included in the fit. 'FNP' includes the contribution from fake/non-prompt lepton background arising from jets (mainly $\pi/K$, heavy-flavour hadron decays and photon conversion) misidentified as leptons, estimated in a purely data-driven way. 'Other' includes contributions from $t\bar{t}W$, $tZ$ and $tWZ$ processes. The total uncertainty in the SM expectation is represented with hatched bands and the expected distributions for selected signal models are shown as dashed lines.

Figure 4

Summary of the total uncertainty in the background prediction for each SR of the tt0L-low, tt0L-high, tt1L and tt2L analysis channels in the statistical combination. Their dominant contributions are indicated by individual lines. Individual uncertainties can be correlated, and do not necessarily add up in quadrature to the total background uncertainty.

More…

HistFactory
Searches for new phenomena in events with two leptons, jets, and missing transverse momentum in $139~\text{fb}^{-1}$ of $\sqrt{s}=13~$TeV $pp$ collisions with the ATLAS detector

The ATLAS collaboration Aad, Georges ; Abbott, Braden Keim ; Abbott, D.C. ; et al.

Eur.Phys.J.C 83 (2023) 515, 2023.

Inspire Record 2072870 DOI 10.17182/hepdata.116034

Searches for new phenomena inspired by supersymmetry in final states containing an $e^+e^-$ or $\mu^+\mu^-$ pair, jets, and missing transverse momentum are presented. These searches make use of proton-proton collision data with an integrated luminosity of 139 $\text{fb}^{-1}$, collected during 2015-2018 at a centre-of-mass energy $\sqrt{s}=13 $TeV by the ATLAS detector at the Large Hadron Collider. Two searches target the pair production of charginos and neutralinos. One uses the recursive-jigsaw reconstruction technique to follow up on excesses observed in 36.1 $\text{fb}^{-1}$ of data, and the other uses conventional event variables. The third search targets pair production of coloured supersymmetric particles (squarks or gluinos) decaying through the next-to-lightest neutralino $(\tilde\chi_2^0)$ via a slepton $(\tilde\ell)$ or $Z$ boson into $\ell^+\ell^-\tilde\chi_1^0$, resulting in a kinematic endpoint or peak in the dilepton invariant mass spectrum. The data are found to be consistent with the Standard Model expectations. Results are interpreted using simplified models and exclude masses up to 900 GeV for electroweakinos, 1550 GeV for squarks, and 2250 GeV for gluinos.

164 data tables match query

Table 16

Breakdown of expected and observed yields in the two recursive-jigsaw reconstruction signal regions after a simultaneous fit of the the CRs. The two sets of regions are fit separately. The uncertainties include both statistical and systematic sources.

Table 18

Breakdown of expected and observed yields in the electroweak search High and $\ell\ell bb$ signal regions after a simultaneous fit to the signal regions and control regions. All statistical and systematic uncertainties are included.

Table 19

Breakdown of expected and observed yields in the electroweak search Int, Low, and OffShell signal regions after a simultaneous fit to the signal regions and control regions. All statistical and systematic uncertainties are included.

More…

Search for new phenomena in final states with photons, jets and missing transverse momentum in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

The ATLAS collaboration Aad, Georges ; Abbott, Braden Keim ; Abbott, D.C. ; et al.

JHEP 07 (2023) 021, 2023.

Inspire Record 2094882 DOI 10.17182/hepdata.115570

A search for new phenomena has been performed in final states with at least one isolated high-momentum photon, jets and missing transverse momentum in proton--proton collisions at a centre-of-mass energy of $\sqrt{s} = 13$ TeV. The data, collected by the ATLAS experiment at the CERN LHC, correspond to an integrated luminosity of 139 $fb^{-1}$. The experimental results are interpreted in a supersymmetric model in which pair-produced gluinos decay into neutralinos, which in turn decay into a gravitino, at least one photon, and jets. No significant deviations from the predictions of the Standard Model are observed. Upper limits are set on the visible cross section due to physics beyond the Standard Model, and lower limits are set on the masses of the gluinos and neutralinos, all at 95% confidence level. Visible cross sections greater than 0.022 fb are excluded and pair-produced gluinos with masses up to 2200 GeV are excluded for most of the NLSP masses investigated.

20 data tables match query

Distribution 1

Observed (points with error bars) and expected background (solid histograms) distributions for $E_{T}^{miss}$ in the signal region (a) SRL, (b) SRM and (c) SRH after the background-only fit applied to the CRs. The predicted signal distributions for the two models with a gluino mass of 2000 GeV and neutralino mass of 250 GeV (SRL), 1050 GeV (SRM) or 1950 GeV (SRH) are also shown for comparison. The uncertainties in the SM background are only statistical.

Distribution 2

Distribution 3

More…

Version 2

HistFactory
Search for chargino--neutralino pair production in final states with three leptons and missing transverse momentum in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS detector

The ATLAS collaboration Aad, Georges ; Abbott, Braden Keim ; Abbott, Dale ; et al.

Eur.Phys.J.C 81 (2021) 1118, 2021.

Inspire Record 1866951 DOI 10.17182/hepdata.95751

A search for chargino$-$neutralino pair production in three-lepton final states with missing transverse momentum is presented. The study is based on a dataset of $\sqrt{s} = 13$ TeV $pp$ collisions recorded with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 139 fb$^{-1}$. No significant excess relative to the Standard Model predictions is found in data. The results are interpreted in simplified models of supersymmetry, and statistically combined with results from a previous ATLAS search for compressed spectra in two-lepton final states. Various scenarios for the production and decay of charginos ($\tilde\chi^\pm_1$) and neutralinos ($\tilde\chi^0_2$) are considered. For pure higgsino $\tilde\chi^\pm_1\tilde\chi^0_2$ pair-production scenarios, exclusion limits at 95% confidence level are set on $\tilde\chi^0_2$ masses up to 210 GeV. Limits are also set for pure wino $\tilde\chi^\pm_1\tilde\chi^0_2$ pair production, on $\tilde\chi^0_2$ masses up to 640 GeV for decays via on-shell $W$ and $Z$ bosons, up to 300 GeV for decays via off-shell $W$ and $Z$ bosons, and up to 190 GeV for decays via $W$ and Standard Model Higgs bosons.

202 data tables match query

Fig 13a SR$_{DFOS}^{Wh}$-1 ($\Delta R_{OS, near}$)

Kinematic distributions after the background-only fit showing the data and the post-fit expected background, in SRs of the onshell $W\!Z$ and $W\!h$ selections. The figure shows (a) the ΔROS,near distribution in SRWhDF-1, (b) the 3rd leading lepton pT in SRWhDF-2, and the (c) ETmiss and (d) mT distributions in SRWZ0j (with all SR-i bins of SRWZ0j summed up). The SR selections are applied for each distribution, except for the variable shown, for which the selection is indicated by an arrow. The last bin includes overflow. The "Others" category contains backgrounds from single-top, WW, triboson, Higgs and rare top processes, except in the top panels, where triboson and Higgs production contributions are shown separately, and tt̄+X is merged into Others. Distributions for wino/bino (+) χ̃1±/χ̃20 → $W\!Z$/$W\!h$ signals are overlaid, with mass values given as (m(χ̃1±),m(χ̃10)) GeV. The bottom panel shows the ratio of the observed data to the predicted yields. The hatched bands indicate the combined theoretical, experimental, and MC statistical uncertainties.

Fig 13a SR$_{DFOS}^{Wh}$-1 ($\Delta R_{OS, near}$)

Fig 13b SR$_{DFOS}^{Wh}$-2 (3rd Lep. $p_{T}$)

Fig 13c SR$_{0j}^{WZ}$ ($E_{T}^{miss}$)

Fig 13d SR$_{0j}^{WZ}$ ($m_{T}$)

Fig 14a SR$^{offWZ}_{LowETmiss}$-0j ($m_{T}^{minmll}$)

Kinematic distributions after the background-only fit showing the data and the post-fit expected background, in SRs of the offshell $W\!Z$ selection. The figure shows the mTmllmin distribution in (a) SRoffWZlowETmiss-0j, (b) SRoffWZlowETmiss-nj and (c) SRoffWZhighETmiss-0j, and the |pTlep|/ETmiss distribution in (d) SRoffWZhighETmiss-nj. The contributing mllmin mass bins within each SRoffWZ category are summed together. The SR selections are applied for each distribution, except for the variable shown, for which the selection is indicated by an arrow. The last bin includes overflow. The "Others" category contains backgrounds from single-top, WW, triboson, Higgs and rare top processes. Distributions for wino/bino (+) χ̃1±/χ̃20 → $W\!Z$ signals are overlaid, with mass values given as (m(χ̃1±),m(χ̃10)) GeV. The bottom panel shows the ratio of the observed data to the predicted yields. The hatched bands indicate the combined theoretical, experimental, and MC statistical uncertainties.

Fig 14a SR$^{offWZ}_{LowETmiss}$-0j ($m_{T}^{minmll}$)

Fig 14b SR$^{offWZ}_{LowETmiss}$-nj ($m_{T}^{minmll}$)

Fig 14c SR$^{offWZ}_{HighETmiss}$-0j ($m_{T}^{minmll}$)

Fig 14d SR$^{offWZ}_{HighETmiss}$-nj ($p_T^l \div E_T^{miss}$)

Fig 16a WZ Exclusion: Wino-bino(+), Obs

Exclusion limits obtained for the $W\!Z$-mediated models in the (a,b) wino/bino (+) scenario, (c) the wino/bino (-) scenario, and (d) the higgsino scenario. The expected 95 CL sensitivity (dashed black line) is shown with ±1σexp (yellow band) from experimental systematic uncertainties and statistical uncertainties on the data yields, the observed limit (red solid line) is shown with ±1σtheory (dotted red lines) from signal cross-section uncertainties. The statistical combination of the onshell $W\!Z$, offshell $W\!Z$, and compressed results is shown as the main contour, while the observed (expected) limits for each individual selection are overlaid in green, blue, and orange solid (dashed) lines, respectively. The exclusion is shown projected (a) onto the m(χ̃1±, χ̃20) vs m(χ̃10) plane or (b,c,d) onto the m(χ̃20) vs Δm plane. The light grey area denotes (top) the constraints obtained by the previous equivalent analysis in ATLAS using the 8 TeV 20.3 fb-1 dataset [17], and (d) the LEP lower χ̃1± mass limit [56]. The pale blue line in the top right panel represents the mass splitting range that yields a dark matter relic density equal to the observed relic density, Ω h2=0.1186±0.0020 [172], when the mass parameters of all the decoupled SUSY partners are set to 5 TeV and tanβ is chosen such that the SM-like Higgs boson mass is consistent with the observed value [43]. The area above (below) the blue line represents a dark-matter relic density larger (smaller) than the observed.

Fig 16a WZ Exclusion: Wino-bino(+), Obs

Fig 16a WZ Exclusion: Wino-bino(+), Obs_Up

Fig 16a WZ Exclusion: Wino-bino(+), Obs_Down

Fig 16a WZ Exclusion: Wino-bino(+), Exp

Fig 16a WZ Exclusion: Wino-bino(+), Exp_Up

Fig 16a WZ Exclusion: Wino-bino(+), Exp_Down

Fig 16a WZ Exclusion: Wino-bino(+), compressed_Obs

Fig 16a WZ Exclusion: Wino-bino(+), compressed_Exp

Fig 16a WZ Exclusion: Wino-bino(+), offshell_Obs

Fig 16a WZ Exclusion: Wino-bino(+), offshell_Exp

Fig 16a WZ Exclusion: Wino-bino(+), onshell_Obs

Fig 16a WZ Exclusion: Wino-bino(+), onshell_Exp

Fig 16b WZ Exclusion: Wino-bino(+) ($\Delta m$), Obs

Fig 16b WZ Exclusion: Wino-bino(+) ($\Delta m$), Obs_Up

Fig 16b WZ Exclusion: Wino-bino(+) ($\Delta m$), Obs_Down

Fig 16b WZ Exclusion: Wino-bino(+) ($\Delta m$), Exp

Fig 16b WZ Exclusion: Wino-bino(+) ($\Delta m$), Exp_Up

Fig 16b WZ Exclusion: Wino-bino(+) ($\Delta m$), Exp_Down

Fig 16b WZ Exclusion: Wino-bino(+) ($\Delta m$), compressed_Obs

Fig 16b WZ Exclusion: Wino-bino(+) ($\Delta m$), compressed_Exp

Fig 16b WZ Exclusion: Wino-bino(+) ($\Delta m$), offshell_Obs

Fig 16b WZ Exclusion: Wino-bino(+) ($\Delta m$), offshell_Exp

Fig 16b WZ Exclusion: Wino-bino(+) ($\Delta m$), onshell_Obs

Fig 16b WZ Exclusion: Wino-bino(+) ($\Delta m$), onshell_Exp

Fig 16c WZ Exclusion: Wino-bino(-) ($\Delta m$), Obs

Fig 16c WZ Exclusion: Wino-bino(-) ($\Delta m$), Obs_Up

Fig 16c WZ Exclusion: Wino-bino(-) ($\Delta m$), Obs_Down

Fig 16c WZ Exclusion: Wino-bino(-) ($\Delta m$), Exp

Fig 16c WZ Exclusion: Wino-bino(-) ($\Delta m$), Exp_Up

Fig 16c WZ Exclusion: Wino-bino(-) ($\Delta m$), Exp_Down

Fig 16c WZ Exclusion: Wino-bino(-) ($\Delta m$), compressed_Obs

Fig 16c WZ Exclusion: Wino-bino(-) ($\Delta m$), compressed_Exp

Fig 16c WZ Exclusion: Wino-bino(-) ($\Delta m$), offshell_Obs

Fig 16c WZ Exclusion: Wino-bino(-) ($\Delta m$), offshell_Exp

Fig 16d WZ Exclusion: Higgsino ($\Delta m$), Obs

Fig 16d WZ Exclusion: Higgsino ($\Delta m$), Obs_Up

Fig 16d WZ Exclusion: Higgsino ($\Delta m$), Obs_Down

Fig 16d WZ Exclusion: Higgsino ($\Delta m$), Exp

Fig 16d WZ Exclusion: Higgsino ($\Delta m$), Exp_Up

Fig 16d WZ Exclusion: Higgsino ($\Delta m$), Exp_Down

Fig 16d WZ Exclusion: Higgsino ($\Delta m$), compressed_Obs

Fig 16d WZ Exclusion: Higgsino ($\Delta m$), compressed_Exp

Fig 16d WZ Exclusion: Higgsino ($\Delta m$), offshell_Obs

Fig 16d WZ Exclusion: Higgsino ($\Delta m$), offshell_Exp

AuxTab 7 Cutflow: Offshell Wino-bino(+) (250,235)

Summary of offshell $W\!Z$ event selections for the m(χ̃20,χ̃10) = (250,235) GeV χ̃1±/χ̃20 signal point, for the wino/bino (+) interpretation. The yields are normalised to a luminosity of 139 fb-1, and MC-to-data efficiency weights from triggering and from the reconstruction and identification of individual physics objects are applied to the final yields in each signal region. After the initial selections, the table is split in row blocks for the inclusive SRoffWZlowETmiss-0j, SRoffWZlowETmiss-nj, SRoffWZhighETmiss-0j, and SRoffWZhighETmiss-nj regions, with the individual SR results in columns. The inclusive OR of regions a through g2 is given in the last column. Selection details per bin are indicated in bracketed blue as relevant, and the final yield for each SR is highlighted in bold green at the end of each block. The generator filters are discussed in detail in Section 4. The "3 isolated lepton selection" includes the common event selection as discussed in Section 5 and the initial SFOS lepton pair selection.

AuxTab 7 Cutflow: Offshell Wino-bino(+) (250,235)

AuxTab 8 Cutflow: Offshell Wino-bino(+) (125,85)

Summary of offshell $W\!Z$ event selections for the m(χ̃20,χ̃10) = (125,85) GeV χ̃1±/χ̃20 signal point, for the wino/bino (+) interpretation. The yields are normalised to a luminosity of 139 fb-1, and MC-to-data efficiency weights from triggering and from the reconstruction and identification of individual physics objects are applied to the final yields in each signal region. After the initial selections, the table is split in row blocks for the inclusive SRoffWZlowETmiss-0j, SRoffWZlowETmiss-nj, SRoffWZhighETmiss-0j, and SRoffWZhighETmiss-nj regions, with the individual SR results in columns. The inclusive OR of regions a through g2 is given in the last column. Selection details per bin are indicated in bracketed blue as relevant, and the final yield for each SR is highlighted in bold green at the end of each block. The generator filters are discussed in detail in Section 4. The "3 isolated lepton selection" includes the common event selection as discussed in Section 5 and the initial SFOS lepton pair selection.

AuxTab 8 Cutflow: Offshell Wino-bino(+) (125,85)

AuxTab 9 Cutflow: Offshell Wino-bino(+) (250,170)

Summary of offshell $W\!Z$ event selections for the m(χ̃20,χ̃10) = (250,170) GeV χ̃1±/χ̃20 signal point, for the wino/bino (+) interpretation. The yields are normalised to a luminosity of 139 fb-1, and MC-to-data efficiency weights from triggering and from the reconstruction and identification of individual physics objects are applied to the final yields in each signal region. After the initial selections, the table is split in row blocks for the inclusive SRoffWZlowETmiss-0j, SRoffWZlowETmiss-nj, SRoffWZhighETmiss-0j, and SRoffWZhighETmiss-nj regions, with the individual SR results in columns. The inclusive OR of regions a through g2 is given in the last column. Selection details per bin are indicated in bracketed blue as relevant, and the final yield for each SR is highlighted in bold green at the end of each block. The generator filters are discussed in detail in Section 4. The "3 isolated lepton selection" includes the common event selection as discussed in Section 5 and the initial SFOS lepton pair selection.

AuxTab 9 Cutflow: Offshell Wino-bino(+) (250,170)

AuxTab 10 Cutflow: Offshell Wino-bino(-) (250,235)

Summary of offshell $W\!Z$ event selections for the m(χ̃20,χ̃10) = (250,235) GeV χ̃1±/χ̃20 signal point, for the wino/bino (-) interpretation. The yields are normalised to a luminosity of 139 fb-1, and MC-to-data efficiency weights from triggering and from the reconstruction and identification of individual physics objects are applied to the final yields in each signal region. After the initial selections, the table is split in row blocks for the inclusive SRoffWZlowETmiss-0j, SRoffWZlowETmiss-nj, SRoffWZhighETmiss-0j, and SRoffWZhighETmiss-nj regions, with the individual SR results in columns. The inclusive OR of regions a through g2 is given in the last column. Selection details per bin are indicated in bracketed blue as relevant, and the final yield for each SR is highlighted in bold green at the end of each block. The generator filters are discussed in detail in Section 4. The "3 isolated lepton selection" includes the common event selection as discussed in Section 5 and the initial SFOS lepton pair selection.

AuxTab 10 Cutflow: Offshell Wino-bino(-) (250,235)

Summary of offshell $W\!Z$ event selections for the m(χ̃20,χ̃10) = (250,235) GeV χ̃1±/χ̃20 signal point, for the wino/bino (-) interpretation. The yields are normalised to a luminosity of 139 fb-1, and MC-to-data efficiency weights from triggering and from the reconstruction and identification of individual physics objects are applied to the final yields in each signal region. After the initial selections, the table is split in row blocks for the inclusive SRoffWZlowETmiss-0j, SRoffWZlowETmiss-nj, SRoffWZhighETmiss-0j, and SRoffWZhighETmiss-nj regions, with the individual SR results in columns. The inclusive OR of regions a through g2 is given in the last column. Selection details per bin are indicated in bracketed blue as relevant, and the final yield for each SR is highlighted in bold green at the end of each block. The generator filters are discussed in detail in Section 4. The "3 isolated lepton selection" includes the common event selection as discussed in Section 5 and the initial SFOS lepton pair selection.

AuxTab 11 Cutflow: Offshell Wino-bino(-) (125,85)

Summary of offshell $W\!Z$ event selections for the m(χ̃20,χ̃10) = (125,85) GeV χ̃1±/χ̃20 signal point, for the wino/bino (-) interpretation. The yields are normalised to a luminosity of 139 fb-1, and MC-to-data efficiency weights from triggering and from the reconstruction and identification of individual physics objects are applied to the final yields in each signal region. After the initial selections, the table is split in row blocks for the inclusive SRoffWZlowETmiss-0j, SRoffWZlowETmiss-nj, SRoffWZhighETmiss-0j, and SRoffWZhighETmiss-nj regions, with the individual SR results in columns. The inclusive OR of regions a through g2 is given in the last column. Selection details per bin are indicated in bracketed blue as relevant, and the final yield for each SR is highlighted in bold green at the end of each block. The generator filters are discussed in detail in Section 4. The "3 isolated lepton selection" includes the common event selection as discussed in Section 5 and the initial SFOS lepton pair selection.

AuxTab 11 Cutflow: Offshell Wino-bino(-) (125,85)

Summary of offshell $W\!Z$ event selections for the m(χ̃20,χ̃10) = (125,85) GeV χ̃1±/χ̃20 signal point, for the wino/bino (-) interpretation. The yields are normalised to a luminosity of 139 fb-1, and MC-to-data efficiency weights from triggering and from the reconstruction and identification of individual physics objects are applied to the final yields in each signal region. After the initial selections, the table is split in row blocks for the inclusive SRoffWZlowETmiss-0j, SRoffWZlowETmiss-nj, SRoffWZhighETmiss-0j, and SRoffWZhighETmiss-nj regions, with the individual SR results in columns. The inclusive OR of regions a through g2 is given in the last column. Selection details per bin are indicated in bracketed blue as relevant, and the final yield for each SR is highlighted in bold green at the end of each block. The generator filters are discussed in detail in Section 4. The "3 isolated lepton selection" includes the common event selection as discussed in Section 5 and the initial SFOS lepton pair selection.

AuxTab 12 Cutflow: Offshell Wino-bino(-) (250,170)

Summary of offshell $W\!Z$ event selections for the m(χ̃20,χ̃10) = (250,170) GeV χ̃1±/χ̃20 signal point, for the wino/bino (-) interpretation. The yields are normalised to a luminosity of 139 fb-1, and MC-to-data efficiency weights from triggering and from the reconstruction and identification of individual physics objects are applied to the final yields in each signal region. After the initial selections, the table is split in row blocks for the inclusive SRoffWZlowETmiss-0j, SRoffWZlowETmiss-nj, SRoffWZhighETmiss-0j, and SRoffWZhighETmiss-nj regions, with the individual SR results in columns. The inclusive OR of regions a through g2 is given in the last column. Selection details per bin are indicated in bracketed blue as relevant, and the final yield for each SR is highlighted in bold green at the end of each block. The generator filters are discussed in detail in Section 4. The "3 isolated lepton selection" includes the common event selection as discussed in Section 5 and the initial SFOS lepton pair selection.

AuxTab 12 Cutflow: Offshell Wino-bino(-) (250,170)

Summary of offshell $W\!Z$ event selections for the m(χ̃20,χ̃10) = (250,170) GeV χ̃1±/χ̃20 signal point, for the wino/bino (-) interpretation. The yields are normalised to a luminosity of 139 fb-1, and MC-to-data efficiency weights from triggering and from the reconstruction and identification of individual physics objects are applied to the final yields in each signal region. After the initial selections, the table is split in row blocks for the inclusive SRoffWZlowETmiss-0j, SRoffWZlowETmiss-nj, SRoffWZhighETmiss-0j, and SRoffWZhighETmiss-nj regions, with the individual SR results in columns. The inclusive OR of regions a through g2 is given in the last column. Selection details per bin are indicated in bracketed blue as relevant, and the final yield for each SR is highlighted in bold green at the end of each block. The generator filters are discussed in detail in Section 4. The "3 isolated lepton selection" includes the common event selection as discussed in Section 5 and the initial SFOS lepton pair selection.

AuxTab 13 Cutflow: Offshell Higgsino (120,100)

Summary of offshell $W\!Z$ event selections for the m(χ̃20,χ̃10) = (120,100) GeV χ̃1±/χ̃20 signal point, for the higgsino interpretation. The yields are normalised to a luminosity of 139 fb-1, and MC-to-data efficiency weights from triggering and from the reconstruction and identification of individual physics objects are applied to the final yields in each signal region. After the initial selections, the table is split in row blocks for the inclusive SRoffWZlowETmiss-0j, SRoffWZlowETmiss-nj, SRoffWZhighETmiss-0j, and SRoffWZhighETmiss-nj regions, with the individual SR results in columns. The inclusive OR of regions a through g2 is given in the last column. Selection details per bin are indicated in bracketed blue as relevant, and the final yield for each SR is highlighted in bold green at the end of each block. The generator filters are discussed in detail in Section 4. The "3 isolated lepton selection" includes the common event selection as discussed in Section 5 and the initial SFOS lepton pair selection.

AuxTab 13 Cutflow: Offshell Higgsino (120,100)

AuxTab 14 Cutflow: Offshell Higgsino (100,40)

Summary of offshell $W\!Z$ event selections for the m(χ̃20,χ̃10) = (100,40) GeV χ̃1±/χ̃20 signal point, for the higgsino interpretation. The yields are normalised to a luminosity of 139 fb-1, and MC-to-data efficiency weights from triggering and from the reconstruction and identification of individual physics objects are applied to the final yields in each signal region. After the initial selections, the table is split in row blocks for the inclusive SRoffWZlowETmiss-0j, SRoffWZlowETmiss-nj, SRoffWZhighETmiss-0j, and SRoffWZhighETmiss-nj regions, with the individual SR results in columns. The inclusive OR of regions a through g2 is given in the last column. Selection details per bin are indicated in bracketed blue as relevant, and the final yield for each SR is highlighted in bold green at the end of each block. The generator filters are discussed in detail in Section 4. The "3 isolated lepton selection" includes the common event selection as discussed in Section 5 and the initial SFOS lepton pair selection.

AuxTab 14 Cutflow: Offshell Higgsino (100,40)

AuxTab 15 Cutflow: Offshell Higgsino (185,125)

Summary of offshell $W\!Z$ event selections for the m(χ̃20,χ̃10) = (185,125) GeV χ̃1±/χ̃20 signal point, for the higgsino interpretation. The yields are normalised to a luminosity of 139 fb-1, and MC-to-data efficiency weights from triggering and from the reconstruction and identification of individual physics objects are applied to the final yields in each signal region. After the initial selections, the table is split in row blocks for the inclusive SRoffWZlowETmiss-0j, SRoffWZlowETmiss-nj, SRoffWZhighETmiss-0j, and SRoffWZhighETmiss-nj regions, with the individual SR results in columns. The inclusive OR of regions a through g2 is given in the last column. Selection details per bin are indicated in bracketed blue as relevant, and the final yield for each SR is highlighted in bold green at the end of each block. The generator filters are discussed in detail in Section 4. The "3 isolated lepton selection" includes the common event selection as discussed in Section 5 and the initial SFOS lepton pair selection.

AuxTab 15 Cutflow: Offshell Higgsino (185,125)

More…

Search for direct pair production of sleptons and charginos decaying to two leptons and neutralinos with mass splittings near the $W$-boson mass in ${\sqrt{s}=13\,}$TeV $pp$ collisions with the ATLAS detector

The ATLAS collaboration Aad, Georges ; Abbott, Braden Keim ; Abbott, D.C. ; et al.

JHEP 06 (2023) 031, 2023.

Inspire Record 2157951 DOI 10.17182/hepdata.134068

A search for the electroweak production of pairs of charged sleptons or charginos decaying into two-lepton final states with missing transverse momentum is presented. Two simplified models of $R$-parity-conserving supersymmetry are considered: direct pair-production of sleptons ($\tilde{\ell}\tilde{\ell}$), with each decaying into a charged lepton and a $\tilde{\chi}_1^0$ neutralino, and direct pair-production of the lightest charginos $(\tilde{\chi}_1^\pm\tilde{\chi}_1^\mp)$, with each decaying into a $W$-boson and a $\tilde{\chi}_1^0$. The lightest neutralino ($\tilde{\chi}_1^0$) is assumed to be the lightest supersymmetric particle (LSP). The analyses target the experimentally challenging mass regions where $m(\tilde{\ell})-m(\tilde{\chi}_1^0)$ and $m(\tilde{\chi}_1^\pm)-m(\tilde{\chi}_1^0)$ are close to the $W$-boson mass (`moderately compressed' regions). The search uses 139 fb$^{-1}$ of $\sqrt{s}=13$ TeV proton-proton collisions recorded by the ATLAS detector at the Large Hadron Collider. No significant excesses over the expected background are observed. Exclusion limits on the simplified models under study are reported in the ($\tilde{\ell},\tilde{\chi}_1^0$) and ($\tilde{\chi}_1^\pm,\tilde{\chi}_1^0$) mass planes at 95% confidence level (CL). Sleptons with masses up to 150 GeV are excluded at 95% CL for the case of a mass-splitting between sleptons and the LSP of 50 GeV. Chargino masses up to 140 GeV are excluded at 95% CL for the case of a mass-splitting between the chargino and the LSP down to about 100 GeV.

174 data tables match query

Acceptance_SR0j_MT2_100_infty

The figure shows the signal acceptance (a) and efficiency (b) plots for the slepton pair production model, in the SR-0J $m_{\mathrm{T2}}^{100} \in[100,\infty)$ region. Acceptance is calculated by applying the signal region requirements to particle-level objects, which do not suffer from identification inefficiencies or mismeasurements. The efficiency is calculated with fully reconstructed objects with the acceptance divided out. Large acceptance and efficiency differences in neighbouring points are due to statistical fluctuations.

Efficiency_SR0j_MT2_100_infty

Acceptance_SR0j_MT2_110_infty

The figure shows the signal acceptance (a) and efficiency (b) plots for the slepton pair production model, in the SR-0J $m_{\mathrm{T2}}^{100} \in[110,\infty)$ region. Acceptance is calculated by applying the signal region requirements to particle-level objects, which do not suffer from identification inefficiencies or mismeasurements. The efficiency is calculated with fully reconstructed objects with the acceptance divided out. Large acceptance and efficiency differences in neighbouring points are due to statistical fluctuations.

More…

HistFactory
Search for supersymmetry in events with four or more charged leptons in $139\,\textrm{fb}^{-1}$ of $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector

The ATLAS collaboration Aad, Georges ; Abbott, Braden Keim ; Abbott, Dale ; et al.

JHEP 07 (2021) 167, 2021.

Inspire Record 1852821 DOI 10.17182/hepdata.103062

A search for supersymmetry in events with four or more charged leptons (electrons, muons and $\tau$-leptons) is presented. The analysis uses a data sample corresponding to $139\,\mbox{fb$^{-1}$}$ of proton-proton collisions delivered by the Large Hadron Collider at $\sqrt{s}=13$ TeV and recorded by the ATLAS detector. Four-lepton signal regions with up to two hadronically decaying $\tau$-leptons are designed to target several supersymmetric models, while a general five-lepton signal region targets any new physics phenomena leading to a final state with five charged leptons. Data yields are consistent with Standard Model expectations and results are used to set upper limits on contributions from processes beyond the Standard Model. Exclusion limits are set at the 95% confidence level in simplified models of general gauge-mediated supersymmetry, excluding higgsino masses up to $540$ GeV. In $R$-parity-violating simplified models with decays of the lightest supersymmetric particle to charged leptons, lower limits of $1.6$ TeV, $1.2$ TeV, and $2.5$ TeV are placed on wino, slepton and gluino masses, respectively.

111 data tables match query

Table 1

The $E_{\mathrm{T}}^{\mathrm{miss}}$ distribution in SR0-ZZ$^{\mathrm{loose}}$ and SR0-ZZ$^{\mathrm{tight}}$ for events passing the signal region requirements except the $E_{\mathrm{T}}^{\mathrm{miss}}$ requirement. Distributions for data, the estimated SM backgrounds after the background-only fit, and an example SUSY scenario are shown. "Other" is the sum of the $tWZ$, $t\bar{t}WW$, $t\bar{t} ZZ$, $t\bar{t} WH$, $t\bar{t} HH$, $t\bar{t} tW$, and $t\bar{t}t\bar{t}$ backgrounds. The last bin captures the overflow events. The lower panel shows the ratio of the observed data to the expected SM background yield in each bin. Both the statistical and systematic uncertainties in the SM background are included in the shaded band. The red arrows indicate the $E_{\mathrm{T}}^{\mathrm{miss}}$ selections in the signal regions.

Table 2

The $E_{\mathrm{T}}^{\mathrm{miss}}$ distribution in SR0-ZZ$_{\mathrm{bveto}}^{\mathrm{loose}}$ and SR0-ZZ$_{\mathrm{bveto}}^{\mathrm{tight}}$ for events passing the signal region requirements except the $E_{\mathrm{T}}^{\mathrm{miss}}$ requirement. Distributions for data, the estimated SM backgrounds after the background-only fit, and an example SUSY scenario are shown. "Other" is the sum of the $tWZ$, $t\bar{t}WW$, $t\bar{t} ZZ$, $t\bar{t} WH$, $t\bar{t} HH$, $t\bar{t} tW$, and $t\bar{t}t\bar{t}$ backgrounds. The last bin captures the overflow events. The lower panel shows the ratio of the observed data to the expected SM background yield in each bin. Both the statistical and systematic uncertainties in the SM background are included in the shaded band. The red arrows indicate the $E_{\mathrm{T}}^{\mathrm{miss}}$ selections in the signal regions.

Table 3

The $E_{\mathrm{T}}^{\mathrm{miss}}$ distribution in SR5L. Distributions for data, the estimated SM backgrounds after the background-only fit, and an example SUSY scenario are shown. "Other" is the sum of the $tWZ$, $t\bar{t}WW$, $t\bar{t} ZZ$, $t\bar{t} WH$, $t\bar{t} HH$, $t\bar{t} tW$, and $t\bar{t}t\bar{t}$ backgrounds. The last bin captures the overflow events. The lower panel shows the ratio of the observed data to the expected SM background yield in each bin. Both the statistical and systematic uncertainties in the SM background are included in the shaded band.

More…

Search for Displaced Supersymmetry in events with an electron and a muon with large impact parameters

The CMS collaboration Khachatryan, Vardan ; Sirunyan, Albert M ; Tumasyan, Armen ; et al.

Phys.Rev.Lett. 114 (2015) 061801, 2015.

Inspire Record 1317640 DOI 10.17182/hepdata.66763

A search for new long-lived particles decaying to leptons is presented using proton-proton collisions produced by the LHC at sqrt(s) = 8 TeV. Data used for the analysis were collected by the CMS detector and correspond to an integrated luminosity of 19.7 inverse femtobarns. Events are selected with an electron and a muon that have transverse impact parameter values between 0.02 cm and 2 cm. The search has been designed to be sensitive to a wide range of models with nonprompt e-mu final states. Limits are set on the "displaced supersymmetry" model, with pair production of top squarks decaying into an e-mu final state via R-parity-violating interactions. The results are the most restrictive to date on this model, with the most stringent limit being obtained for a top squark lifetime corresponding to c tau = 2 cm, excluding masses below 790 GeV at 95% confidence level.

3 data tables match query

Table 1

Electron transverse impact parameter distribution for data and expected background processes after the preselection requirements have been applied. The event yields per bin have been rescaled to account for the varying bin sizes. The rightmost bin contains the overflow entries.

Table 2

Muon transverse impact parameter distribution for data and expected background processes after the preselection requirements have been applied. The event yields per bin have been rescaled to account for the varying bin sizes. The rightmost contains the overflow entries.

Table 4

Expected and observed 95% CL cross section exclusion contours for top squark pair production in the plane of top squark lifetime ($c\tau$) and top squark mass. These limits assume a branching fraction of 100\% through the RPV vertex $\tilde{t}$ $\to$ b l, where the branching fraction to any lepton flavor is equal to 1/3. As indicated in the plot, the region to the left of the contours is excluded by this search.

Date

Collaboration

Subject_areas

Phrases Reset

Reactions

Observables Reset

CM Energies (GeV)

Authors Reset

Version 2

HistFactory
Search for squarks and gluinos in final states with one isolated lepton, jets, and missing transverse momentum at $\sqrt{s}=13$ TeV with the ATLAS detector

rivet Analysis
Search for supersymmetry in events with three leptons and missing transverse momentum in sqrt(s) = 7 TeV pp collisions with the ATLAS detector

rivet Analysis
Search for R-parity-violating supersymmetry in events with four or more leptons in sqrt(s) = 7 TeV pp collisions with the ATLAS detector

Constraints on spin-0 dark matter mediators and invisible Higgs decays using ATLAS 13 TeV $pp$ collision data with two top quarks and missing transverse momentum in the final state

HistFactory
Searches for new phenomena in events with two leptons, jets, and missing transverse momentum in $139~\text{fb}^{-1}$ of $\sqrt{s}=13~$TeV $pp$ collisions with the ATLAS detector

Search for new phenomena in final states with photons, jets and missing transverse momentum in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

Version 2

HistFactory
Search for chargino--neutralino pair production in final states with three leptons and missing transverse momentum in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS detector

Search for direct pair production of sleptons and charginos decaying to two leptons and neutralinos with mass splittings near the $W$-boson mass in ${\sqrt{s}=13\,}$TeV $pp$ collisions with the ATLAS detector

HistFactory
Search for supersymmetry in events with four or more charged leptons in $139\,\textrm{fb}^{-1}$ of $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector

Search for Displaced Supersymmetry in events with an electron and a muon with large impact parameters

Date

Collaboration

Subject_areas

Phrases Reset

Reactions

Observables Reset

CM Energies (GeV)

Authors Reset

Version 2 HistFactory Search for squarks and gluinos in final states with one isolated lepton, jets, and missing transverse momentum at $\sqrt{s}=13$ TeV with the ATLAS detector

Version 2 HistFactory Search for chargino--neutralino pair production in final states with three leptons and missing transverse momentum in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS detector

Version 2

HistFactory
Search for squarks and gluinos in final states with one isolated lepton, jets, and missing transverse momentum at $\sqrt{s}=13$ TeV with the ATLAS detector

Version 2

HistFactory
Search for chargino--neutralino pair production in final states with three leptons and missing transverse momentum in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS detector