Search for squarks and gluinos in $pp$ collisions at $\sqrt{s}=13$ TeV and $13.6$ TeV in events with $\tau$-leptons, jets and missing transverse momentum using the ATLAS detector

Abstract

A search for R-parity-conserving supersymmetry in events with large missing transverse momentum, jets and at least one hadronically decaying $\tau$-lepton is presented. Both gluino and squark pair production are considered, with the cascade decay of each gluino or squark producing either a $\tau$-slepton or a $\tau$-sneutrino. Three channels are examined, requiring either exactly one hadronically decaying $\tau$-lepton and no other leptons, exactly one hadronically decaying $\tau$-lepton and at least one other lepton, or two or more hadronically decaying $\tau$-leptons. Analyses in the three channels are optimised independently and combined statistically. Two separate analysis strategies, either a cut-and-count or machine-learning approach, are used. The search uses 140 ${\mathrm{fb}}^{-1}$ and 51.8 ${\mathrm{fb}}^{-1}$ of $pp$ collision data recorded by the ATLAS detector at the Large Hadron Collider during 2015-2018 at $\sqrt{s}=13$ TeV and 2022-2023 at $\sqrt{s}=13.6$ TeV, respectively. Gluino masses below $2.25$ TeV and squark masses up to $1.7$ TeV are excluded.

arXiv comment62 pages in total, author list starting page 45, 14 figures, 10 tables, published by EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HMBS-2024-05

References in corpus (124)

• XGBoost: A Scalable Tree Boosting System
• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• A Brief Introduction to PYTHIA 8.1
• Particle Dark Matter: Evidence, Candidates and Constraints
• FastJet user manual
• Asymptotic formulae for likelihood-based tests of new physics
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Parton distributions for the LHC Run II
• Herwig++ Physics and Manual
• Parton distributions with LHC data
• A Supersymmetry Primer
• The ATLAS Simulation Infrastructure
• PDF4LHC recommendations for LHC Run II
• Theories with Gauge-Mediated Supersymmetry Breaking
• The total top quark pair production cross-section at hadron colliders through O(alpha_S^4)
• Top++: a program for the calculation of the top-pair cross-section at hadron colliders
• Herwig 7.0 / Herwig++ 3.0 Release Note
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• A Positive-Weight Next-to-Leading-Order Monte Carlo for Heavy Flavour Hadroproduction
• QCD Matrix Elements + Parton Showers
• Event Generation with Sherpa 2.2
• An NNLO subtraction formalism in hadron collisions and its application to Higgs boson production at the LHC
• QCD matrix elements + parton showers: The NLO case
• High-precision QCD at hadron colliders: electroweak gauge boson rapidity distributions at NNLO
• Performance of the ATLAS Trigger System in 2015
• Measuring masses of semi-invisibly decaying particles pair produced at hadron colliders
• Two-loop soft anomalous dimensions for single top quark associated production with a W- or H-
• QCD matrix elements and truncated showers
• -- HATHOR -- HAdronic Top and Heavy quarks crOss section calculatoR
• Percent level precision physics at the Tevatron: first genuine NNLO QCD corrections to q qbar -> t tbar + X
• Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation
• Weak lensing mass reconstruction of the interacting cluster 1E0657-558: Direct evidence for the existence of dark matter
• NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels
• NNLO corrections to top pair production at hadron colliders: the quark-gluon reaction
• A critical appraisal of NLO+PS matching methods
• Production and Integration of the ATLAS Insertable B-Layer
• Topological cell clustering in the ATLAS calorimeters and its performance in LHC Run 1
• Performance of pile-up mitigation techniques for jets in $pp$ collisions at $\sqrt{s}=8$ TeV using the ATLAS detector
• Electron and photon performance measurements with the ATLAS detector using the 2015-2017 LHC proton-proton collision data
• Simplified Models for LHC New Physics Searches
• Transverse-momentum resummation and the spectrum of the Higgs boson at the LHC
• NNLO QCD corrections to the Higgs-strahlung processes at hadron colliders
• Hadronic top-quark pair production with NNLL threshold resummation
• Squark and Gluino Production at Hadron Colliders
• Threshold resummation for squark-antisquark and gluino-pair production at the LHC
• Simplified Models for a First Characterization of New Physics at the LHC
• Measurement of the $Z/{\gamma }^{\ast }$ boson transverse momentum distribution in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector
• ATLAS $b$-jet identification performance and efficiency measurement with $t\bar{t}$ events in $pp$ collisions at $\sqrt{s}=13$ TeV
• Jet reconstruction and performance using particle flow with the ATLAS Detector
• Soft gluon resummation for the production of gluino-gluino and squark-antisquark pairs at the LHC
• Jet energy scale measurements and their systematic uncertainties in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Soft-gluon resummation for squark and gluino hadroproduction
• HATHOR for single top-quark production: Updated predictions and uncertainty estimates for single top-quark production in hadronic collisions
• Performance of electron and photon triggers in ATLAS during LHC Run 2
• Muon reconstruction and identification efficiency in ATLAS using the full Run 2 $pp$ collision data set at $\sqrt{s}=13$ TeV
• Electroweak Radiative Corrections to Associated WH and ZH Production at Hadron Colliders
• ATLAS data quality operations and performance for 2015-2018 data-taking
• Correcting the Colour-Dipole Cascade Model with Fixed Order Matrix Elements
• Jet energy scale and resolution measured in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• NNLOPS simulation of Higgs boson production
• Performance of the ATLAS muon triggers in Run 2
• HistFitter software framework for statistical data analysis
• MINLO: Multi-scale improved NLO
• Higgs boson production in association with top quarks in the POWHEG BOX
• Merging H/W/Z + 0 and 1 jet at NLO with no merging scale: a path to parton shower + NNLO matching
• Exploration of the MSSM with Non-Universal Higgs Masses
• Matching Tree-Level Matrix Elements with Interleaved Showers
• Electron reconstruction and identification in the ATLAS experiment using the 2015 and 2016 LHC proton-proton collision data at $\sqrt{s}$ = 13 TeV
• Transverse-momentum resummation: Higgs boson production at the Tevatron and the LHC
• vh@nnlo - Higgs Strahlung at hadron colliders
• Top-Quark Mediated Effects in Hadronic Higgs-Strahlung
• Implications of non-universality of soft terms in supersymmetric grand unified theories
• Evaluation of three methods for calculating statistical significance when incorporating a systematic uncertainty into a test of the background-only hypothesis for a Poisson process
• The PDF4LHC21 combination of global PDF fits for the LHC Run III
• Gluon-induced Higgs-strahlung at next-to-leading order QCD
• Luminosity determination in $pp$ collisions at $\sqrt{s}=13$ TeV using the ATLAS detector at the LHC
• HAWK 2.0: A Monte Carlo program for Higgs production in vector-boson fusion and Higgs strahlung at hadron colliders
• NLO Higgs boson production plus one and two jets using the POWHEG BOX, MadGraph4 and MCFM
• Searching for Directly Decaying Gluinos at the Tevatron
• NNLL-fast: predictions for coloured supersymmetric particle production at the LHC with threshold and Coulomb resummation
• ATLAS flavour-tagging algorithms for the LHC Run 2 $pp$ collision dataset
• Summary of the ATLAS experiment's sensitivity to supersymmetry after LHC Run 1 - interpreted in the phenomenological MSSM
• Soft gluon resummation for gluon-induced Higgs Strahlung
• An Unbiased Hessian Representation for Monte Carlo PDFs
• Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton-proton collisions at the LHC
• Search for squarks and gluinos in final states with jets and missing transverse momentum using 139 fb${}^{-1}$ of $\sqrt{s}$ =13 TeV $pp$ collision data with the ATLAS detector
• Summary of the searches for squarks and gluinos using $\sqrt{s}$ = 8 TeV pp collisions with the ATLAS experiment at the LHC
• NNLL resummation for squark and gluino production at the LHC
• NNLL resummation for squark-antisquark pair production at the LHC
• Bisection-based asymmetric MT2 computation: a higher precision calculator than existing symmetric methods
• Towards NNLL resummation: hard matching coefficients for squark and gluino hadroproduction
• Performance of the missing transverse momentum triggers for the ATLAS detector during Run-2 data taking
• Search for physics beyond the standard model in events with tau leptons, jets, and large transverse momentum imbalance in pp collisions at sqrt(s) = 7 TeV
• Software and computing for Run 3 of the ATLAS experiment at the LHC
• Studies of the muon momentum calibration and performance of the ATLAS detector with $pp$ collisions at $\sqrt{s}$=13 TeV
• Collider signatures of gravitino dark matter with a sneutrino NLSP
• The ATLAS Experiment at the CERN Large Hadron Collider: A Description of the Detector Configuration for Run 3
• Search for resonant and non-resonant Higgs boson pair production in the $b\bar{b}{\tau }^{+}{\tau }^{-}$ decay channel using 13 TeV $pp$ collision data from the ATLAS detector
• Revisiting light neutralino scenarios in the MSSM
• The performance of the jet trigger for the ATLAS detector during 2011 data taking
• Sneutrino NLSP Scenarios in the NUHM with Gravitino Dark Matter
• Measurements of Higgs boson production cross-sections in the $H\to {\tau }^{+}{\tau }^{-}$ decay channel in $pp$ collisions at $\sqrt{s}=13\text{TeV}$ with the ATLAS detector
• Search for new phenomena in final states with large jet multiplicities and missing transverse momentum using $\sqrt{(}s)=13$ TeV proton$-$proton collisions recorded by ATLAS in Run 2 of the LHC
• Signals of a Sneutrino (N)LSP at the LHC
• The quest to discover supersymmetry at the ATLAS experiment
• 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 Trigger System for LHC Run 3 and Trigger performance in 2022
• Search for squarks and gluinos in final states with hadronically decaying $\tau$-leptons, jets, and missing transverse momentum using $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Electron and photon energy calibration with the ATLAS detector using LHC Run 2 data
• The performance of missing transverse momentum reconstruction and its significance with the ATLAS detector using 140 fb${}^{-1}$ of $\sqrt{s}=13$ TeV $pp$ collisions
• Search for squarks and gluinos in events with hadronically decaying tau leptons, jets and missing transverse momentum in proton-proton collisions at $\sqrt{s}=13$ TeV recorded with the ATLAS detector
• Leptophilic Signals of a Sneutrino (N)LSP and Flavor Biases from Flavor-Blind SUSY
• A light sneutrino rescues the light stop
• Tau-Sneutrino NLSP and Multilepton Signatures at the LHC
• Beyond Cuts in Small Signal Scenarios -- Enhanced Sneutrino Detectability Using Machine Learning
• NNLL-fast 2.0: Coloured Sparticle Production at the LHC Run 3 with $\sqrt{S}$ = 13.6 TeV
• Signatures of supersymmetry with non-universal Higgs mass at the Large Hadron Collider