Leptons lurking in semi-visible jets at the LHC
arXiv:2206.03909 · doi:10.1140/epjc/s10052-022-10775-2
Abstract
This Letter proposes a new search for confining dark sectors at the Large Hadron Collider. As a result of the strong dynamics in the hidden sector, dark matter could manifest in proton-proton collisions at the Large Hadron Collider in form of hadronic jets containing stable invisible bound states. These semi-visible jets have been studied theoretically and experimentally in the fully hadronic signature where the unstable composite dark matter can only decay promptly back to Standard Model quarks. We present a simplified model based on two messenger fields separated by a large mass gap allowing dark bound states to decay into pairs of oppositely charged leptons. The resulting experimental signature is characterized by non-isolated lepton pairs inside semi-visible jets. We propose a search strategy independent from the underlying model assumptions targeting this new signature, and discuss the orthogonality with respect to the existing searches. Remaining agnostic on the shape of the di-lepton spectrum, we determine the sensitivity of a dedicated analysis to the target signal. The proposed search can claim the 3σ evidence (exclusion) of the heavier mediator up to masses of 3.5 TeV (4.5 TeV) with the full Run 2 data of the LHC. Exploiting the resonant feature of the lepton pairs can enhance the sensitivity reach on a specific model. We estimate that an analysis using the di-lepton invariant mass information can reach 5σ discovery up to masses of 3.5 TeV and improve the exclusion up to more than 5 TeV.
arXiv comment8 pages , 3 figures and 1 table
References in corpus (59)
- 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
- Particle Dark Matter: Evidence, Candidates and Constraints
- FastJet user manual
- Supersymmetric Dark Matter
- Asymptotic formulae for likelihood-based tests of new physics
- DELPHES 3, A modular framework for fast simulation of a generic collider experiment
- LHAPDF6: parton density access in the LHC precision era
- Confidence Level Computation for Combining Searches with Small Statistics
- Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
- Supersymmetric Unification Without Low Energy Supersymmetry And Signatures for Fine-Tuning at the LHC
- Echoes of a Hidden Valley at Hadron Colliders
- The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry
- Parton distributions with QED corrections
- Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at 13 TeV
- Illuminating Dark Photons with High-Energy Colliders
- Search for high-mass dilepton resonances using 139 fb of collision data collected at 13 TeV with the ATLAS detector
- Simplified Models for Dark Matter Searches at the LHC
- The Stueckelberg Extension with Kinetic Mixing and Milli-Charged Dark Matter From the Hidden Sector
- Search for new phenomena in the dijet mass distribution using collision data at TeV with the ATLAS detector
- Search for decays
- Current status of direct dark matter detection experiments
- Folded Supersymmetry and the LEP Paradox
- Emerging Jets
- Search for new phenomena in events with an energetic jet and missing transverse momentum in collisions at TeV with the ATLAS detector
- Semi-visible Jets: Dark Matter Undercover at the LHC
- Efficient Identification of Boosted Semileptonic Top Quarks at the LHC
- Search for direct top-squark pair production in final states with two leptons in pp collisions at sqrt(s)=8TeV with the ATLAS detector
- Search for high mass dijet resonances with a new background prediction method in proton-proton collisions at 13 TeV
- Search for high-mass resonances in dilepton final states in proton-proton collisions at 13 TeV
- Phenomenology of A Three-Family Standard-like String Model
- Search for dark matter in events with a Z boson and missing transverse momentum in pp collisions at =8 TeV with the ATLAS detector
- Visible Effects of Invisible Hidden Valley Radiation
- Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at 13 TeV
- Search for new physics with same-sign isolated dilepton events with jets and missing transverse energy
- LHC Searches for Dark Sector Showers
- Search for dark matter at colliders
- Discerning Secluded Sector gauge structures
- Search for a narrow resonance lighter than 200 GeV decaying to a pair of muons in proton-proton collisions at 13 TeV
- Indirect dark matter searches in Gamma- and Cosmic Rays
- Search for dark matter produced in association with a leptonically decaying Z boson in proton-proton collisions at 13 TeV
- Tagging a jet from a dark sector with Jet-substructures at colliders
- Perturbative benchmark models for a dark shower search program
- Strongly interacting dark sectors in the early Universe and at the LHC through a simplified portal
- Search for long-lived neutral particles in collisions at = 13 TeV that decay into displaced hadronic jets in the ATLAS calorimeter
- Search for pair production of first-generation scalar leptoquarks at 13 TeV
- Autoencoders for Semivisible Jet Detection
- Search for dark matter produced in association with a Standard Model Higgs boson decaying into -quarks using the full Run 2 dataset from the ATLAS detector
- Search for resonant production of strongly coupled dark matter in proton-proton collisions at 13 TeV
- Jet Substructure from Dark Sector Showers
- Search for new phenomena in events with three or more charged leptons in collisions at TeV with the ATLAS detector
- Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at 13 TeV
- Search for dark matter particles produced in association with a Higgs boson in proton-proton collisions at 13 TeV
- Search for dark matter produced in association with a single top quark in TeV collisions with the ATLAS detector
- Search for supersymmetry in pp collisions at 13 TeV with 137 fb in final states with a single lepton using the sum of masses of large-radius jets
- Search for new physics in final states with a single photon and missing transverse momentum in proton-proton collisions at 13 TeV
- Search for new physics in the lepton plus missing transverse momentum final state in proton-proton collisions at 13 TeV