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Dark Sectors and New, Light, Weakly-Coupled Particles

Canonical reference. 75% of citing Pith papers cite this work as background.

12 Pith papers citing it
Background 75% of classified citations
abstract

Dark sectors, consisting of new, light, weakly-coupled particles that do not interact with the known strong, weak, or electromagnetic forces, are a particularly compelling possibility for new physics. Nature may contain numerous dark sectors, each with their own beautiful structure, distinct particles, and forces. This review summarizes the physics motivation for dark sectors and the exciting opportunities for experimental exploration. It is the summary of the Intensity Frontier subgroup "New, Light, Weakly-coupled Particles" of the Community Summer Study 2013 (Snowmass). We discuss axions, which solve the strong CP problem and are an excellent dark matter candidate, and their generalization to axion-like particles. We also review dark photons and other dark-sector particles, including sub-GeV dark matter, which are theoretically natural, provide for dark matter candidates or new dark matter interactions, and could resolve outstanding puzzles in particle and astro-particle physics. In many cases, the exploration of dark sectors can proceed with existing facilities and comparatively modest experiments. A rich, diverse, and low-cost experimental program has been identified that has the potential for one or more game-changing discoveries. These physics opportunities should be vigorously pursued in the US and elsewhere.

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representative citing papers

Galactic Amnesia: The Information Washout of the Milky Way Merger History

astro-ph.GA · 2026-05-05 · unverdicted · novelty 6.0

Mutual information analysis of TNG50 simulations shows gravitational potential and total energy retain merger mass and infall time information longest, while radial velocity loses it within ~5 Gyr, with washout depending on radius, merger age, and mass.

Letter of Intent: The Forward Physics Facility

hep-ex · 2025-10-30 · unverdicted · novelty 5.0

Proposes construction of the Forward Physics Facility at the HL-LHC with four complementary detectors to exploit forward neutrinos and new-particle fluxes for neutrino, QCD, astroparticle, and dark-matter measurements.

Science Case for the Einstein Telescope

astro-ph.CO · 2019-12-05 · unverdicted · novelty 3.0

The Einstein Telescope will enable gravitational-wave observations up to cosmological distances, opening avenues for discoveries in astrophysics, cosmology, and fundamental physics.

The Dark Photon

hep-ph · 2020-05-04 · unverdicted · novelty 2.0

The paper surveys theoretical motivations, experimental searches, and bounds on the dark photon as a kinetically mixed gauge boson from a dark sector, covering both massive and massless cases along with related milli-charged fermion constraints.

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Showing 8 of 8 citing papers after filters.

  • CMB Limits on the Absorption of Light Vector and Axial-Vector Dark Matter astro-ph.CO · 2026-05-08 · conditional · none · ref 43

    Planck CMB data set upper limits on vector and axial-vector dark matter-electron couplings for masses 100 eV to 100 keV via energy injection from inelastic scattering and hydrogen absorption.

  • Low-Multiplicity Jets as Probes of GeV-Scale Light-Quark-Coupled Particles hep-ph · 2026-04-21 · unverdicted · none · ref 10

    A proposed LHC search using low-multiplicity jets plus a photon can extend sensitivity to GeV-scale particles that couple to light quarks.

  • On Exclusive Coherent Production of Bosons in Electron-Proton Collisions hep-ph · 2026-04-09 · unverdicted · none · ref 40

    A phenomenological 2-to-3 framework is constructed for exclusive boson electroproduction that matches flux-factorized predictions near Q^{2}=0 while capturing finite-Q^{2} effects at larger virtualities.

  • Letter of Intent: The Forward Physics Facility hep-ex · 2025-10-30 · unverdicted · none · ref 254 · internal anchor

    Proposes construction of the Forward Physics Facility at the HL-LHC with four complementary detectors to exploit forward neutrinos and new-particle fluxes for neutrino, QCD, astroparticle, and dark-matter measurements.

  • Science Case for the Einstein Telescope astro-ph.CO · 2019-12-05 · unverdicted · none · ref 179 · internal anchor

    The Einstein Telescope will enable gravitational-wave observations up to cosmological distances, opening avenues for discoveries in astrophysics, cosmology, and fundamental physics.

  • CMB-S4 Science Case, Reference Design, and Project Plan astro-ph.IM · 2019-07-10 · unverdicted · none · ref 12 · internal anchor

    Presents the science case, reference design, and project plan for the CMB-S4 ground-based CMB experiment.

  • The Dark Photon hep-ph · 2020-05-04 · unverdicted · none · ref 9 · internal anchor

    The paper surveys theoretical motivations, experimental searches, and bounds on the dark photon as a kinetically mixed gauge boson from a dark sector, covering both massive and massless cases along with related milli-charged fermion constraints.

  • Searching for dark photons in $J/\psi$ decays hep-ph · 2026-04-20 · unreviewed · ref 27