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.
8 pages , 3 figures and 1 table
References in corpus (27)
- 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
- LHAPDF6: parton density access in the LHC precision era
- Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
- Echoes of a Hidden Valley at Hadron Colliders
- Illuminating Dark Photons with High-Energy Colliders
- 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
- Emerging Jets
- Search for new phenomena in events with an energetic jet and missing transverse momentum in collisions at TeV with the ATLAS detector
- 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 dark matter in events with a Z boson and missing transverse momentum in pp collisions at =8 TeV with the ATLAS detector
- 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
- Indirect dark matter searches in Gamma- and Cosmic Rays
- Perturbative benchmark models for a dark shower search program
- Autoencoders for Semivisible Jet Detection
- Search for resonant production of strongly coupled dark matter in proton-proton collisions at 13 TeV
- 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 dark matter produced in association with a single top quark or a top quark pair 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