Exploration at the high-energy frontier: ATLAS Run~2 searches investigating the exotic jungle beyond the Standard Model

Abstract

This report presents a comprehensive collection of searches for new physics performed by the ATLAS Collaboration during the Run 2 period of data taking at the Large Hadron Collider, from 2015 to 2018, corresponding to about 140 fb${}^{-1}$ of $\sqrt{s}=13$ TeV proton-proton collision data. These searches cover a variety of beyond-the-standard model topics such as dark matter candidates, new vector bosons, hidden-sector particles, leptoquarks, or vector-like quarks, among others. Searches for supersymmetric particles or extended Higgs sectors are explicitly excluded as these are the subject of separate reports by the Collaboration. For each topic, the most relevant searches are described, focusing on their importance and sensitivity and, when appropriate, highlighting the experimental techniques employed. In addition to the description of each analysis, complementary searches are compared, and the overall sensitivity of the ATLAS experiment to each type of new physics is discussed. Summary plots and statistical combinations of multiple searches are included whenever possible.

126 pages in total, author list starting page 109, 50 figures, 6 tables, published in Physics Reports. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2023-14/

References in corpus (92)

• 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
• An Introduction to PYTHIA 8.2
• Parton distributions for the LHC
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Results from a search for dark matter in the complete LUX exposure
• Dark Matter Candidates from Particle Physics and Methods of Detection
• Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment
• Echoes of a Hidden Valley at Hadron Colliders
• First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment
• Searching for Dark Matter Annihilation in Recently Discovered Milky Way Satellites with Fermi-LAT
• Dark Matter Search Results from the PandaX-4T Commissioning Run
• Illuminating Dark Photons with High-Energy Colliders
• Muon reconstruction and identification efficiency in ATLAS using the full Run 2 $pp$ collision data set at $\sqrt{s}=13$ TeV
• Search for New Physics in Electronic Recoil Data from XENONnT
• Discovering the Higgs Through Highly-Displaced Vertices
• Phenomenology of Hidden Valleys at Hadron Colliders
• Constraining the Spin-Dependent WIMP-Nucleon Cross Sections with XENON1T
• Low-Mass Dark Matter Search with CDMSlite
• Emerging Jets
• A Clockwork Theory
• Luminosity determination in $pp$ collisions at $\sqrt{s}=13$ TeV using the ATLAS detector at the LHC
• Complementarity of dark matter detectors in light of the neutrino background
• On measuring the masses of pair-produced semi-invisibly decaying particles at hadron colliders
• A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
• ATLAS flavour-tagging algorithms for the LHC Run 2 $pp$ collision dataset
• BlackMax: A black-hole event generator with rotation, recoil, split branes and brane tension
• Identification and energy calibration of hadronically decaying tau leptons with the ATLAS experiment in $pp$ collisions at $\sqrt{s}$=8 TeV
• Search for Light Dark Matter-Electron Scatterings in the PandaX-II Experiment
• Colorful quantum black holes at the LHC
• Search for charged Higgs bosons decaying into a top quark and a bottom quark at $\sqrt{s}$=13 TeV with the ATLAS detector
• LHC Searches for Dark Sector Showers
• Search for dark matter annihilation signals in the H.E.S.S. Inner Galaxy Survey
• Invisible Higgs Decay Width vs. Dark Matter Direct Detection Cross Section in Higgs Portal Dark Matter Models
• Search for invisible Higgs-boson decays in events with vector-boson fusion signatures using 139 ${\text{fb}}^{-1}$ of proton-proton data recorded by the ATLAS experiment
• A Model of Muon Anomalies
• Discovering Higgs Decays to Lepton Jets at Hadron Colliders
• Search for pair production of third-generation scalar leptoquarks decaying into a top quark and a $\tau$-lepton in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for GeV-scale Dark Matter Annihilation in the Sun with IceCube DeepCore
• Search for low-mass resonances decaying into two jets and produced in association with a photon using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for new phenomena in events with two opposite-charge leptons, jets and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Combined searches for dark matter in dwarf spheroidal galaxies observed with the MAGIC telescopes, including new data from Coma Berenices and Draco
• Search for new phenomena with top quark pairs in final states with one lepton, jets, and missing transverse momentum in $pp$ collisions at $\sqrt{s}$= 13 TeV with the ATLAS detector
• Search for new phenomena in final states with $b$-jets and missing transverse momentum in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
• Search for dark matter produced in association with a Standard Model Higgs boson decaying into $b$-quarks using the full Run 2 dataset from the ATLAS detector
• Search for dark matter in events with missing transverse momentum and a Higgs boson decaying into two photons in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Dark sector searches with the CMS experiment
• Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector
• The quest to discover supersymmetry at the ATLAS experiment
• Search for dark matter produced in association with a single top quark in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
• Tools for estimating fake/non-prompt lepton backgrounds with the ATLAS detector at the LHC
• Enriching the physics program of the CMS experiment via data scouting and data parking
• Observation of electroweak production of two jets in association with an isolated photon and missing transverse momentum, and search for a Higgs boson decaying into invisible particles at 13 TeV with the ATLAS detector
• Search for Ultraheavy Dark Matter from Observations of Dwarf Spheroidal Galaxies with VERITAS
• Search for heavy Majorana or Dirac neutrinos and right-handed $W$ gauge bosons in final states with charged leptons and jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for magnetic monopoles and stable particles with high electric charges in $\sqrt{s}=$13 TeV $pp$ collisions with the ATLAS detector
• Search for single production of vector-like $T$ quarks decaying into $Ht$ or $Zt$ in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for exotic decays of the Higgs boson into long-lived particles in $pp$ collisions at $\sqrt{s}=13$ TeV using displaced vertices in the ATLAS inner detector
• Search for Majorana neutrinos in same-sign $WW$ scattering events from $pp$ collisions at $\sqrt{s}=13$ TeV
• Search for third-generation vector-like leptons in $pp$ collisions at $\sqrt{s}=13\text{TeV}$ with the ATLAS detector
• ATLAS searches for additional scalars and exotic Higgs boson decays with the LHC Run 2 dataset
• Search for a new Z' gauge boson in $4\mu$ events with the ATLAS experiment
• Search for non-resonant production of semi-visible jets using Run 2 data in ATLAS
• Search for pair-produced scalar and vector leptoquarks decaying into third-generation quarks and first- or second-generation leptons in pp collisions with the ATLAS detector
• Searches for Higgs boson production through decays of heavy resonances
• 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
• Search for neutral long-lived particles in $pp$ collisions at $\sqrt{s}=13$ TeV that decay into displaced hadronic jets in the ATLAS calorimeter
• Search for heavy resonances decaying into a $Z$ or $W$ boson and a Higgs boson in final states with leptons and $b$-jets in $139$fb${}^{-1}$ of $pp$ collisions at $\sqrt{s}=13$TeV with the ATLAS detector
• Search for resonant $WZ\to \ell \nu {\ell }^{\prime }{\ell }^{\prime }$ production in proton$-$proton collisions at $\sqrt{\mathbf{s}}=13$ TeV with the ATLAS detector
• Higgs portal vector dark matter interpretation: review of Effective Field Theory approach and ultraviolet complete models
• Search for pair production of third-generation leptoquarks decaying into a bottom quark and a $\tau$-lepton with the ATLAS detector
• Search for single vector-like $B$ quark production and decay via $B\to bH(b\bar{b})$ in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Stairway to discovery: a report on the CMS programme of cross section measurements from millibarns to femtobarns
• Pursuit of paired dijet resonances in the Run 2 dataset with ATLAS
• Recent results from DEAP-3600
• Search for dark matter produced in association with a dark Higgs boson decaying into $W^{+}{W}^{-}$ in the one-lepton final state at $\sqrt{s}$=13 TeV using 139 fb${}^{-1}$ of $pp$ collisions recorded with the ATLAS detector
• Precise predictions for V+2 jet backgrounds in searches for invisible Higgs decays
• Search for dark matter produced in association with a Higgs boson decaying to tau leptons at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for excited $\tau$-leptons and leptoquarks in the final state with $\tau$-leptons and jets in pp collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for dark matter produced in association with a single top quark and an energetic $W$ boson in $\sqrt{s}=$ 13 TeV $pp$ collisions with the ATLAS detector
• Review of top quark mass measurements in CMS
• Search for lepton-flavour violation in high-mass dilepton final states using 139 ${\mathrm{fb}}^{-1}$ of $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Electroweak, QCD and flavour physics studies with ATLAS data from Run 2 of the LHC
• Search for leptoquarks decaying into the b$\tau$ final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for top-philic heavy resonances in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for vector-boson resonances decaying into a top quark and a bottom quark using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for new phenomena in multi-body invariant masses in events with at least one isolated lepton and two jets using $\sqrt{s}=13$ TeV proton-proton collision data collected by the ATLAS detector
• Climbing to the Top of the ATLAS 13 TeV data
• Search for low-mass dark matter WIMPs with 12 ton-day exposure of DarkSide-50
• Search for periodic signals in the dielectron and diphoton invariant mass spectra using 139 fb${}^{-1}$ of $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector

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• Model-agnostic search for dijet resonances with anomalous jet substructure in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Vector-like quarks: status and new directions at the LHC
• Testing tree level TeV scale seesaw scenarios in $\mu$TRISTAN
• Search for charged Higgs bosons through vector-like top quark pair production at the LHC
• Climbing to the Top of the ATLAS 13 TeV data
• Search for vector-like leptons coupling to first- and second-generation Standard Model leptons in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Observation of WZ$\gamma$ production and constraints on new physics scenarios in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Gaussian Process Regression as a Sustainable Data-driven Background Estimate Method at the (HL)-LHC
• Comparing the motion of dark matter and standard model particles on cosmological scales
• Search for a Dark Higgs Boson Produced in Association with Inelastic Dark Matter at the Belle II Experiment
• Right handed neutrino production from $Z^{\prime }$ interactions in forward search experiments
• Transforming jet flavour tagging at ATLAS
• Review of Neutral Naturalness
• Exploring vector-like $B$-quark pair production at CLIC in fully hadronic final states
• Hybrid Type-II and Type-III seesaw model for the muon $g-2$ anomaly
• Observation of tWZ production at the CMS experiment
• Enhancing di-jet resonance searches via a final-state radiation jet tagging algorithm
• Search for emerging jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS experiment
• Missing-mass search in forward-proton-tagged dilepton events with the ATLAS detector
• Probing inelastic sub-GeV dark matter at the DUNE near detector
• Spin identification of the mono-Z${}^{\prime }$ resonance in muon-pair production at the ILC with simulated electron-positron collisions at $\sqrt{s}$ = 500 GeV
• Evidence of ZZ$\gamma$ production and observation of $4\ell \gamma$ in proton-proton collisions at $\sqrt{s}$ = 13 TeV