Theory, phenomenology, and experimental avenues for dark showers: a Snowmass 2021 report

Abstract

In this work, we consider the case of a strongly coupled dark/hidden sector, which extends the Standard Model (SM) by adding an additional non-Abelian gauge group. These extensions generally contain matter fields, much like the SM quarks, and gauge fields similar to the SM gluons. We focus on the exploration of such sectors where the dark particles are produced at the LHC through a portal and undergo rapid hadronization within the dark sector before decaying back, at least in part and potentially with sizeable lifetimes, to SM particles, giving a range of possibly spectacular signatures such as emerging or semi-visible jets. Other, non-QCD-like scenarios leading to soft unclustered energy patterns or glueballs are also discussed. After a review of the theory, existing benchmarks and constraints, this work addresses how to build consistent benchmarks from the underlying physical parameters and present new developments for the PYTHIA Hidden Valley module, along with jet substructure studies. Finally, a series of improved search strategies is presented in order to pave the way for a better exploration of the dark showers at the LHC.

arXiv commentUniform notation, fixed typos, improved numerical analysis, added references, comments welcome

References in corpus (165)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The Large N Limit of Superconformal Field Theories and Supergravity
• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• A Brief Introduction to PYTHIA 8.1
• FastJet user manual
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• Dispelling the N^3 myth for the Kt jet-finder
• The four-loop beta-function in Quantum Chromodynamics
• R-parity violating supersymmetry
• Tuning PYTHIA 8.1: the Monash 2013 Tune
• The glueball spectrum from an anisotropic lattice study
• Identifying Boosted Objects with N-subjettiness
• Echoes of a Hidden Valley at Hadron Colliders
• Description and performance of track and primary-vertex reconstruction with the CMS tracker
• The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry
• Conformal collider physics: Energy and charge correlations
• Matching matrix elements and shower evolution for top-quark production in hadronic collisions
• Infrared Properties of QCD from Dyson-Schwinger equations
• Deep Inelastic Scattering and Gauge/String Duality
• Missing Energy Signatures of Dark Matter at the LHC
• ParticleNet: Jet Tagging via Particle Clouds
• Constraints on Light Majorana Dark Matter from Colliders
• The SIMPlest Miracle
• Maverick dark matter at colliders
• The automation of next-to-leading order electroweak calculations
• Discovering the Higgs Through Highly-Displaced Vertices
• Search for dark matter and other new phenomena in events with an energetic jet and large missing transverse momentum using the ATLAS detector
• Phenomenology of Hidden Valleys at Hadron Colliders
• Searching for New Physics with Deep Autoencoders
• Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider
• Folded Supersymmetry and the LEP Paradox
• The Machine Learning Landscape of Top Taggers
• Self-Interacting Dark Matter from a Non-Abelian Hidden Sector
• Beyond Effective Field Theory for Dark Matter Searches at the LHC
• Gaining (Mutual) Information about Quark/Gluon Discrimination
• Search for new phenomena in dijet events using 37 fb${}^{-1}$ of $pp$ collision data collected at $\sqrt{s}=$13 TeV with the ATLAS detector
• Emerging Jets
• Macroscopic Strings and "Quirks" at Colliders
• Deep-learned Top Tagging with a Lorentz Layer
• Characterising dark matter searches at colliders and direct detection experiments: Vector mediators
• Scale invariant extension of the standard model with strongly interacting hidden sector
• Composite strongly interacting dark matter
• Review of strongly-coupled composite dark matter models and lattice simulations
• SIMP Spectroscopy
• Search for new phenomena in events with an energetic jet and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Dynamical generation of the weak and Dark Matter scale
• Search for new resonances in mass distributions of jet pairs using 139 fb${}^{-1}$ of $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Semi-visible Jets: Dark Matter Undercover at the LHC
• A generic anti-QCD jet tagger
• QCD or What?
• Search for supersymmetry in proton-proton collisions at 13 TeV in final states with jets and missing transverse momentum
• Performance of the ATLAS Track Reconstruction Algorithms in Dense Environments in LHC Run 2
• Jet evolution in the N=4 SYM plasma at strong coupling
• On the running coupling constant in QCD
• A Quirky Little Higgs Model
• Fermion Portal Dark Matter
• BlackMax: A black-hole event generator with rotation, recoil, split branes and brane tension
• Studies of Hadronic Event Structure in e+e- Annihilation from 30 GeV to 209 GeV with the L3 Detector
• Constraining Dark Sectors at Colliders: Beyond the Effective Theory Approach
• Hidden SU(N) Glueball Dark Matter
• The Scale of Dark QCD
• Pulling Out All the Tops with Computer Vision and Deep Learning
• Flavored Dark Matter, and Its Implications for Direct Detection and Colliders
• CHARYBDIS: A Black Hole Event Generator
• LHC and Tevatron bounds on the dark matter direct detection cross-section for vector mediators
• The Metric Space of Collider Events
• A Pure-Glue Hidden Valley I. States and Decays
• Measurement of event shape distributions and moments in e+e- -> hadrons at 91-209 GeV and a determination of alpha_s
• Aidnogenesis via Leptogenesis and Dark Sphalerons
• Visible Effects of Invisible Hidden Valley Radiation
• Cosmology and Accelerator Tests of Strongly Interacting Dark Matter
• A study of the energy evolution of event shape distributions and their means with the DELPHI detector at LEP
• Dark matter with $t$-channel mediator: a simple step beyond contact interaction
• Twin Higgs WIMP Dark Matter
• Pure-glue hidden valleys through the Higgs portal
• Measurement of alpha_s(M_Z^2) from Hadronic Event Observables at the Z^0 Resonance
• LHC Searches for Dark Sector Showers
• Communication with SIMP dark mesons via Z'-portal
• Dark Matter from Minimal Flavor Violation
• Toward Full LHC Coverage of Natural Supersymmetry
• Discerning Secluded Sector gauge structures
• Flavored dark matter beyond Minimal Flavor Violation
• Effective WIMPs
• SU(N) gauge theories in 3+1 dimensions: glueball spectrum, string tensions and topology
• Contact Interactions Probe Effective Dark Matter Models at the LHC
• Monojet versus rest of the world I: t-channel Models
• Electroweak symmetry breaking and cold dark matter from strongly interacting hidden sector
• Triggering Soft Bombs at the LHC
• Non-Abelian Dark Forces and the Relic Densities of Dark Glueballs
• Lepton Jets from Radiating Dark Matter
• Mesons in large-N QCD
• Light asymmetric dark matter from new strong dynamics
• Majorana Dark Matter with a Coloured Mediator: Collider vs Direct and Indirect Searches
• A search for pair-produced resonances in four-jet final states at $\sqrt{s}$ =13 TeV with the ATLAS detector
• Catfish: A Monte Carlo simulator for black holes at the LHC
• Dynamical Dark Matter from Strongly-Coupled Dark Sectors
• Perturbative benchmark models for a dark shower search program
• Signals of New Physics in the Underlying Event
• Tagging a jet from a dark sector with Jet-substructures at colliders
• Thermal Dark Matter from a Confining Sector
• Strongly interacting dark sectors in the early Universe and at the LHC through a simplified portal
• Resolving phenomenological problems with strongly-interacting-massive-particle models with dark vector resonances
• String Theory and the Dark Glueball Problem
• Search for new particles decaying to a jet and an emerging jet
• Search for new physics in dijet angular distributions using proton-proton collisions at $\sqrt{s}=$ 13 TeV and constraints on dark matter and other models
• A flavoured dark sector
• Casting a graph net to catch dark showers
• The Hyperbolic Higgs
• The Hidden Geometry of Particle Collisions
• A search for prompt lepton-jets in $pp$ collisions at $\sqrt{s}=$ 8 TeV with the ATLAS detector
• The AdS/QCD Correspondence: Still Undelivered
• Glueball scattering cross section in lattice SU(2) Yang-Mills theory
• Autoencoders for Semivisible Jet Detection
• Mapping monojet constraints onto Simplified Dark Matter Models
• Dark matter in Hidden Valley models with stable and unstable light dark mesons
• Singlet Scalar Top Partners from Accidental Supersymmetry
• Useful relations among the generators in the defining and adjoint representations of SU(N)
• Charming ALPs
• Dark Mesons at the LHC
• Quenched mesonic spectrum at large N
• Simplified SIMPs and the LHC
• Search for light long-lived neutral particles produced in $pp$ collisions at $\sqrt{s}=$ 13 TeV and decaying into collimated leptons or light hadrons with the ATLAS detector
• Search for resonant production of strongly coupled dark matter in proton-proton collisions at 13 TeV
• Asymmetric Dark Matter and the hadronic spectra of hidden QCD
• Collider phenomenology of Hidden Valley mediators of spin 0 or 1/2 with semivisible jets
• Unsupervised Hadronic SUEP at the LHC
• Unleashing the full power of LHCb to probe Stealth New Physics
• Dark matter scattering cross section and dynamics in dark Yang-Mills theory
• Jet Substructure from Dark Sector Showers
• A Theory of Dark Pions
• Dark atoms and composite dark matter
• Light Hidden Mesons through the Z Portal
• The Flavour Portal to Dark Matter
• Lattice baryons in the 1/N expansion
• Searches for low-mass dimuon resonances
• On Dark Matter Interactions with the Standard Model through an Anomalous $Z^{\prime }$
• Mono-X Versus Direct Searches: Simplified Models for Dark Matter at the LHC
• Search for black holes and sphalerons in high-multiplicity final states in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for black holes and other new phenomena in high-multiplicity final states in proton-proton collisions at sqrt(s) = 13 TeV
• Charming Dark Matter
• Isospin-Violating Dark Matter with Colored Mediators
• Triggering on Emerging Jets
• Conformal window from conformal expansion
• Search for lepton-flavor violating decays of heavy resonances and quantum black holes to e$\mu$ final states in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Flavoured Dark Matter Moving Left
• Mesons at large Nc from lattice QCD
• New sensitivity of LHC measurements to Composite Dark Matter Models
• Classification of dark pion multiplets as dark matter candidates and collider phenomenology
• The Efficacy of Event Isotropy as an Event Shape Observable
• Effective Field Theory in AdS: Continuum Regime, Soft Bombs, and IR Emergence
• Unified Scenario for Composite Right-Handed Neutrinos and Dark Matter
• Collider constraints on dark mediators
• Effective Theories of Dark Mesons with Custodial Symmetry
• Search for new phenomena in high-mass final states with a photon and a jet from $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Exploring Jet Substructure in Semi-visible jets
• Twin Quark Dark Matter From Cogenesis
• Spheres To Jets: Tuning Event Shapes with 5d Simplified Models
• The omega rho pi coupling in the VMD model revisited
• e^+ e^- -> 3 jets and event shapes at NNLO
• Breaking Mirror Twin Color
• Tagging $b$ quarks at extreme energies without tracks
• Flavor and CP Violation from a QCD-like Hidden Sector
• Search for strongly interacting massive particles generating trackless jets in proton-proton collisions at $\sqrt{s}=$ 13 TeV