Invisible and displaced dark matter signatures at Belle II

Abstract

Many dark matter models generically predict invisible and displaced signatures at Belle II, but even striking events may be missed by the currently implemented search programme because of inefficient trigger algorithms. Of particular interest are final states with a single photon accompanied by missing energy and a displaced pair of electrons, muons, or hadrons. We argue that a displaced vertex trigger will be essential to achieve optimal sensitivity at Belle II. To illustrate this point, we study a simple but well-motivated model of thermal inelastic dark matter in which this signature naturally occurs and show that otherwise inaccessible regions of parameter space can be tested with such a search. We also evaluate the sensitivity of single-photon searches at BaBar and Belle II to this model and provide detailed calculations of the relic density target.

arXiv comment28 pages, 10 figures; v2: matches published version; thermal targets provided as ancillary files

References in corpus (42)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• UFO - The Universal FeynRules Output
• CalcHEP 3.4 for collider physics within and beyond the Standard Model
• Neutralino Relic Density including Coannihilations
• Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
• micrOMEGAs5.0 : freeze-in
• Exploring Portals to a Hidden Sector Through Fixed Targets
• FASER: ForwArd Search ExpeRiment at the LHC
• Light Dark Matter: Models and Constraints
• Implications of Generalized Z-Z' Mixing
• Serendipity in dark photon searches
• New Limits on Hidden Photons from Past Electron Beam Dumps
• Revised constraints and Belle II sensitivity for visible and invisible axion-like particles
• Strong Constraints on Sub-GeV Dark Matter from SLAC Beam Dump E137
• Searching for Long-lived Particles: A Compact Detector for Exotics at LHCb
• New Detectors to Explore the Lifetime Frontier
• Probing Light Thermal Dark-Matter With a Higgs Portal Mediator
• Observing a light dark matter beam with neutrino experiments
• Dark Matter, Millicharges, Axion and Scalar Particles, Gauge Bosons, and Other New Physics with LDMX
• Constraining Light Dark Matter with Low-Energy e+e- Colliders
• Dark Sectors at the Fermilab SeaQuest Experiment
• Accelerating the Discovery of Light Dark Matter
• New Electron Beam-Dump Experiments to Search for MeV to few-GeV Dark Matter
• Strong constraints on self-interacting dark matter with light mediators
• Discovering Inelastic Thermal-Relic Dark Matter at Colliders
• Inelastic Dark Matter at the LHC Lifetime Frontier: ATLAS, CMS, LHCb, CODEX-b, FASER, and MATHUSLA
• Constraints on light mediators: confronting dark matter searches with B physics
• Cosmology and Accelerator Tests of Strongly Interacting Dark Matter
• Testing Light Dark Matter Coannihilation With Fixed-Target Experiments
• Direct detection of dark matter in models with a light Z'
• BBN constraints on the annihilation of MeV-scale dark matter
• How to save the WIMP: global analysis of a dark matter model with two s-channel mediators
• Loop corrections to dark matter direct detection in a pseudoscalar mediator dark matter model
• Increasing Neff with particles in thermal equilibrium with neutrinos
• Revisiting the Dark Photon Explanation of the Muon Anomalous Magnetic Moment
• Impact of Resonance on Thermal Targets for Invisible Dark Photon Searches
• Strongly interacting dark sectors in the early Universe and at the LHC through a simplified portal
• Signals of a Light Dark Force in the Galactic Center
• Loop-induced direct detection signatures from CP-violating scalar mediators
• Light dark Higgs boson in minimal sub-GeV dark matter scenarios
• Loop Effects in Direct Detection

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