Symbolic regression produces an approximate classifier for LHC exclusion limits that enables their direct inclusion during pMSSM global fits.
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micrOMEGAs 6.0: N-component dark matter
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abstract
micrOMEGAs is a numerical code to compute dark matter (DM) observables in generic extensions of the Standard Model of particle physics. We present a new version of micrOMEGAs that includes a generalization of the Boltzmann equations governing the DM cosmic abundance evolution which can be solved to compute the relic density of N-component DM. The direct and indirect detection rates in such scenarios take into account the relative contribution of each component such that constraints on the combined signal of all DM components can be imposed. The co-scattering mechanism for DM production is also included, whereas the routines used to compute the relic density of feebly interacting particles have been improved in order to take into account the effect of thermal masses of t-channel particles. Finally, the tables for the DM self-annihilation - induced photon spectra have been extended down to DM masses of 110 MeV, and they now include annihilation channels into light mesons.
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hep-ph 28representative citing papers
Dark radiation from dark matter produced in Z decays generates long-lived dark photons that dominate over meson decays and bremsstrahlung for small kinetic mixing and masses above the GeV scale, allowing FASER2, FACET, and MATHUSLA to probe relic-abundance-consistent regions beyond conventional dark
A nonholomorphic T' modular model realizes the T4-2-i one-loop topology for radiative Majorana neutrino masses, forbids tree-level seesaws via modular assignments, stabilizes DM with residual Z2, and fits oscillation data plus DM constraints for both hierarchies with fermionic DM.
A two-loop neutrino mass model with modular S4 and Z3 symmetries reproduces charged lepton masses and normal-ordering neutrino data while predicting observable LFV and viable DM candidates.
A two-component pNGB dark matter model in which two independent soft-breaking parameters control the mass splitting and enable conversion between the heavier and lighter components while suppressing direct detection rates.
MadAnalysis 5 v1.11 adds validated recasting of two ATLAS compressed-electroweakino searches and shows that a proposed NMSSM scenario fits the soft-lepton and monojet excesses less well than simpler models.
Dirac right-handed neutrinos in a U(1)_{B-L} Z' portal model produce observable ΔN_eff that, together with direct/indirect detection and collider bounds, carves out testable WIMP and FIMP dark-matter regions.
A scotogenic model variant predicts observable charged-lepton-flavor-violating decay rates and measurable T/P asymmetries at future experiments, with tau-to-3mu asymmetries offering a falsification handle.
Future electroweak precision measurements can probe light higgsinos up to 500 GeV even in compressed spectra below the neutrino fog, complementing direct detection which reaches the 1 TeV thermal relic mass.
The micrOMEGAs dark-matter package now solves Boltzmann equations with user-defined expansion and entropy histories, adds sub-GeV hadronic annihilation, and updates CMB, dwarf-galaxy, LZ, and CMS constraints.
An explicit model is built where Dirac fermion dark matter semi-annihilates to boosted dark matter plus neutrinos, with two-loop radiative neutrino masses, requiring a mediator mass of O(1) MeV to reach O(10^{-36}) cm² scattering cross section detectable in DUNE and DARWIN.
Fermi LAT data on mini-spikes around stellar-mass black holes rules out substantial regions of Inert Doublet Model dark matter parameter space, especially at multi-TeV masses.
A minimal extension of the Standard Model with three heavy Majorana neutrinos simultaneously realizes fermionic dark matter, a strong first-order electroweak phase transition, and low-scale resonant leptogenesis consistent with neutrino data.
Freeze-in at low reheating temperatures allows MeV-scale dark matter in vector portal models to be probed by future direct detection experiments in nuclear recoils for 50-500 MeV masses and via enhanced solar neutrino coherent scattering.
WIMP models for the Galactic Center Excess survive only in finely tuned resonant funnels with portal couplings around 10^-4, with leptophilic vectors and pseudoscalar portals remaining most viable after current bounds.
A three-loop radiative neutrino mass model with vectorlike leptons and scalar dark matter that fits oscillation data, dark matter constraints, and lepton flavor violation bounds while predicting testable signals.
A 2HDM extended by two real scalar singlets is scanned with evolutionary strategies to locate regions satisfying vacuum, unitarity, oblique-parameter, collider and dark-matter constraints.
Projects COSI and AMEGO-X sensitivities to sub-GeV DM in vector-scalar portals, finding COSI leading in some regions beyond CMB limits and AMEGO-X covering most continuum cases.
In the 2HD+a model with near-zero A-a mixing, single-component WIMP dark matter naturally lies below the neutrino floor above 100 GeV while two-component scenarios are largely excluded by current bounds.
In low-reheating-temperature charged-parent freeze-in dark matter models, stronger couplings are viable if both dark matter and mediator number densities are tracked, with updated LHC and lepton-flavor-violation constraints.
BSMArt version 2 adds new scanning algorithms including Affine MC, MLScanner, and CMA-ES variants to simplify and accelerate parameter space exploration in new physics models, demonstrated on soft lepton excess searches at the LHC.
Only the hypercharge-zero fermionic electroweak triplet dark matter survives current relic density, direct detection, and indirect detection constraints among the minimal triplet extensions considered.
Collider experiments can strongly constrain p-wave-suppressed derivative operators and thereby limit reheating temperature, DM mass, and interaction scale needed to match observed DM abundance during reheating.
A dark matter fermion is shown to simultaneously explain the relic density, satisfy direct detection and collider bounds, and produce observable rates for muon-to-electron transitions in a viable parameter region.
citing papers explorer
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Symbolic Classification-Enabled LHC Limits Online BSM Global Fits
Symbolic regression produces an approximate classifier for LHC exclusion limits that enables their direct inclusion during pMSSM global fits.
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Search for Long-Lived Dark Photons from Dark Radiation at the LHC
Dark radiation from dark matter produced in Z decays generates long-lived dark photons that dominate over meson decays and bremsstrahlung for small kinetic mixing and masses above the GeV scale, allowing FASER2, FACET, and MATHUSLA to probe relic-abundance-consistent regions beyond conventional dark
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Radiative Neutrino Mass in a Nonholomorphic $T'$ Modular Invariant Model
A nonholomorphic T' modular model realizes the T4-2-i one-loop topology for radiative Majorana neutrino masses, forbids tree-level seesaws via modular assignments, stabilizes DM with residual Z2, and fits oscillation data plus DM constraints for both hierarchies with fermionic DM.
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Two-loop neutrino mass model with modular $S_4$ symmetry
A two-loop neutrino mass model with modular S4 and Z3 symmetries reproduces charged lepton masses and normal-ordering neutrino data while predicting observable LFV and viable DM candidates.
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Two component pseudo-Nambu-Goldstone-boson dark matter
A two-component pNGB dark matter model in which two independent soft-breaking parameters control the mass splitting and enable conversion between the heavier and lighter components while suppressing direct detection rates.
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Deciphering compressed electroweakino excesses with MadAnalysis 5
MadAnalysis 5 v1.11 adds validated recasting of two ATLAS compressed-electroweakino searches and shows that a proposed NMSSM scenario fits the soft-lepton and monojet excesses less well than simpler models.
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$Z^\prime$ Portal Dark Matter with Observable $\Delta N_{\rm eff}$
Dirac right-handed neutrinos in a U(1)_{B-L} Z' portal model produce observable ΔN_eff that, together with direct/indirect detection and collider bounds, carves out testable WIMP and FIMP dark-matter regions.
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Revisiting cLFV in "T1-2-A" scotogenic models: asymmetries in three-body lepton decays
A scotogenic model variant predicts observable charged-lepton-flavor-violating decay rates and measurable T/P asymmetries at future experiments, with tau-to-3mu asymmetries offering a falsification handle.
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Complementary Probes of Light Higgsinos: Electroweak Precision Measurements and Dark Matter Direct Detection
Future electroweak precision measurements can probe light higgsinos up to 500 GeV even in compressed spectra below the neutrino fog, complementing direct detection which reaches the 1 TeV thermal relic mass.
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micrOMEGAs 7: Beyond standard cosmology
The micrOMEGAs dark-matter package now solves Boltzmann equations with user-defined expansion and entropy histories, adds sub-GeV hadronic annihilation, and updates CMB, dwarf-galaxy, LZ, and CMS constraints.
-
Boosted dark matter via semi-annihilation in a radiative neutrino mass model
An explicit model is built where Dirac fermion dark matter semi-annihilates to boosted dark matter plus neutrinos, with two-loop radiative neutrino masses, requiring a mediator mass of O(1) MeV to reach O(10^{-36}) cm² scattering cross section detectable in DUNE and DARWIN.
-
Probing the Inert Doublet Dark Matter with Stellar-Mass Black Hole Mini-Spikes
Fermi LAT data on mini-spikes around stellar-mass black holes rules out substantial regions of Inert Doublet Model dark matter parameter space, especially at multi-TeV masses.
-
Solving Cosmological Puzzles using Finite Temperature $\nu$SMEFT
A minimal extension of the Standard Model with three heavy Majorana neutrinos simultaneously realizes fermionic dark matter, a strong first-order electroweak phase transition, and low-scale resonant leptogenesis consistent with neutrino data.
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New benchmarks for direct detection of freeze-in dark matter in vector portal models
Freeze-in at low reheating temperatures allows MeV-scale dark matter in vector portal models to be probed by future direct detection experiments in nuclear recoils for 50-500 MeV masses and via enhanced solar neutrino coherent scattering.
-
A Comprehensive Study of WIMP Models Explaining the Fermi-LAT Galactic Center Excess
WIMP models for the Galactic Center Excess survive only in finely tuned resonant funnels with portal couplings around 10^-4, with leptophilic vectors and pseudoscalar portals remaining most viable after current bounds.
-
Radiative neutrino mass generation and dark matter through vectorlike leptons
A three-loop radiative neutrino mass model with vectorlike leptons and scalar dark matter that fits oscillation data, dark matter constraints, and lepton flavor violation bounds while predicting testable signals.
-
Machine Learning in the 2HDM2S model for Dark Matter
A 2HDM extended by two real scalar singlets is scanned with evolutionary strategies to locate regions satisfying vacuum, unitarity, oblique-parameter, collider and dark-matter constraints.
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Constraining light dark matter in vector-scalar portals with COSI and AMEGO-X
Projects COSI and AMEGO-X sensitivities to sub-GeV DM in vector-scalar portals, finding COSI leading in some regions beyond CMB limits and AMEGO-X covering most continuum cases.
-
Charting Dark Matter down to the neutrino floor/fog in the 2HD+a scenario
In the 2HD+a model with near-zero A-a mixing, single-component WIMP dark matter naturally lies below the neutrino floor above 100 GeV while two-component scenarios are largely excluded by current bounds.
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Freeze-in at all couplings
In low-reheating-temperature charged-parent freeze-in dark matter models, stronger couplings are viable if both dark matter and mediator number densities are tracked, with updated LHC and lepton-flavor-violation constraints.
-
BSMArt 2: simpler and faster parameter space scans
BSMArt version 2 adds new scanning algorithms including Affine MC, MLScanner, and CMA-ES variants to simplify and accelerate parameter space exploration in new physics models, demonstrated on soft lepton excess searches at the LHC.
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Twilight of the WIMP: Comprehensive Phenomenology of Electroweak Triplet Dark Matter
Only the hypercharge-zero fermionic electroweak triplet dark matter survives current relic density, direct detection, and indirect detection constraints among the minimal triplet extensions considered.
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From WIMP to FIMP during reheating: collider vs non-collider probes for p-wave annihilation
Collider experiments can strongly constrain p-wave-suppressed derivative operators and thereby limit reheating temperature, DM mass, and interaction scale needed to match observed DM abundance during reheating.
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Dark Matter as a Source for Lepton Flavor Violation
A dark matter fermion is shown to simultaneously explain the relic density, satisfy direct detection and collider bounds, and produce observable rates for muon-to-electron transitions in a viable parameter region.
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Multi Component Dark Matter in a Minimal Model
A Z2-symmetric Higgs-portal model with two singlet fermions and one singlet scalar yields multi-component dark matter consistent with relic density and direct-detection bounds.
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Global analysis of a minimally extended scotogenic model
Global analysis constrains fermionic DM to 120-350 GeV and CP-odd scalar to 350-600 GeV in a scotogenic extension, with DESI potentially ruling out inverted neutrino hierarchy and Z invisible width compatible with data at 3 sigma.
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Heavy singlet fermionic dark matter with $Z_4$ symmetry
In the Z4-symmetric singlet fermionic DM model with a new scalar, viable heavy-DM parameter space in the secluded regime permits non-negligible Higgs mixing while satisfying relic density and direct detection bounds.
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WIMP Dark Matter within the dark photon portal
Derives lower limits on dark photon parameters from thermal relic density for Dirac fermion and complex scalar WIMPs and compares resulting spin-independent cross sections to direct detection upper bounds.