Heterotic string theory implies the QCD axion mass is bounded below by 0.5 neV and typically falls in [0.5, 0.8] neV across most compactifications.
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Nb3Sn films on Cu via Cu-Sn diffusion achieve Q=77,000 at zero field in a test cavity, outperforming bare Cu for potential axion searches.
Reformulating local polynomial fitting with orthogonal Chebyshev polynomials yields two algorithms that cut memory use, improve scalability, and deliver orders-of-magnitude better numerical accuracy than Vandermonde-based methods for Savitzky-Golay filters.
No excess observed; first LHC search sets 95% CL upper limits on H to AA to 4e branching fraction down to 10^{-5} for 10-100 MeV masses and short lifetimes.
Superradiant axion clouds around black holes can undergo gravitational superfluorescence via a seeded coherent quadrupolar transition, leading to a detectable delayed gravitational-wave pulse.
A piezoelectric-driven glass capillary launcher enables localized, high-efficiency (up to 93%) in-vacuum loading of silica spheres, nanodiamonds, and plate-like particles into single-beam, dual-beam, and standing-wave optical traps.
Leptophilic ALPs with m_a > f_a can explain the electron anomalous magnetic moment tension over a large parameter space and are testable via μ→e conversion.
Extended misalignment for axion-like particles with constant-ω_ϕ pre-oscillation and dark radiation coupling yields data-driven constraints favoring negative ω_ϕ and f_ϕ in [80, 1.5×10^10] TeV but does not ease cosmological tensions.
De Sitter entropy is carried by hairons from S^4/Z_N instantons, yielding a 1/N information see-saw for neutrino masses with N ~ 10^120.
Axion-photon oscillations generate bipartite mode entanglement with maximal values at resonance, and quantum speed limits are derived for both axion-photon and neutrino systems.
Chiral EFT with meson-ALP mixing yields predictions for branching ratios, invariant-mass distributions, and forward-backward asymmetries in semileptonic tau decays to axion-like particles and mesons.
A central black hole accelerates cosmic axion string loop decay, substantially shortening lifetimes and producing large axion and gravitational wave radiation for primordial black holes as small as 10^{-16} solar masses.
Quantum gravity forces the QCD theta parameter to emerge as the vev of a local axion field through coherent-state representations of geometry and a quantum-information interpretation of topological-charge superselection.
An integrated experimental system for sub-eV ALP searches using four-wave mixing has been commissioned and validated at ELI-NP with 20 mJ laser pulses at 1.3e-7 mbar vacuum.
Review classifies QCD axion models extending the standard mass-coupling window and updates bounds from cosmology, astrophysics, and experiments.
Status report on ALPS II experiment detailing recent progress in optical cavities, single-photon detection, magnets, and site infrastructure for axion-like particle searches.
A pedagogical review summarizing analytic predictions and recent lattice results for theta-dependence and topological susceptibility in QCD.
citing papers explorer
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Heterotic String Theory Suggests a QCD Axion Near 0.5 neV
Heterotic string theory implies the QCD axion mass is bounded below by 0.5 neV and typically falls in [0.5, 0.8] neV across most compactifications.
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Nb$_3$Sn Thin Films Using a Cu-Sn Route for Dark Matter Detection
Nb3Sn films on Cu via Cu-Sn diffusion achieve Q=77,000 at zero field in a test cavity, outperforming bare Cu for potential axion searches.
-
Fast and accurate noise removal by curve fitting using orthogonal polynomials
Reformulating local polynomial fitting with orthogonal Chebyshev polynomials yields two algorithms that cut memory use, improve scalability, and deliver orders-of-magnitude better numerical accuracy than Vandermonde-based methods for Savitzky-Golay filters.
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Search for light pseudoscalar bosons, pair-produced in Higgs boson decays in the four-electron final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV
No excess observed; first LHC search sets 95% CL upper limits on H to AA to 4e branching fraction down to 10^{-5} for 10-100 MeV masses and short lifetimes.
-
Gravitational superfluorescence from superradiant axion clouds
Superradiant axion clouds around black holes can undergo gravitational superfluorescence via a seeded coherent quadrupolar transition, leading to a detectable delayed gravitational-wave pulse.
-
Localized efficient in-vacuum loading of $\sim$0.1-10 $\mu$m spherical and plate-like particles into optical traps using a pulled glass capillary
A piezoelectric-driven glass capillary launcher enables localized, high-efficiency (up to 93%) in-vacuum loading of silica spheres, nanodiamonds, and plate-like particles into single-beam, dual-beam, and standing-wave optical traps.
-
Crossing into the $m_a > f_a$ Region for Leptophilic ALPs
Leptophilic ALPs with m_a > f_a can explain the electron anomalous magnetic moment tension over a large parameter space and are testable via μ→e conversion.
-
Axion dark matter from extended misalignment with a constant-$\omega_\phi$ pre-oscillatory phase and dark radiation
Extended misalignment for axion-like particles with constant-ω_ϕ pre-oscillation and dark radiation coupling yields data-driven constraints favoring negative ω_ϕ and f_ϕ in [80, 1.5×10^10] TeV but does not ease cosmological tensions.
-
$\mathcal{H}$olographic $\mathcal{N}$aturalness and Information See-Saw Mechanism for Neutrinos
De Sitter entropy is carried by hairons from S^4/Z_N instantons, yielding a 1/N information see-saw for neutrino masses with N ~ 10^120.
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New quantum information perspectives in the axion--photon and neutrino systems
Axion-photon oscillations generate bipartite mode entanglement with maximal values at resonance, and quantum speed limits are derived for both axion-photon and neutrino systems.
-
Axion-like particle-meson production in semileptonic $\tau$ decays
Chiral EFT with meson-ALP mixing yields predictions for branching ratios, invariant-mass distributions, and forward-backward asymmetries in semileptonic tau decays to axion-like particles and mesons.
-
Black Holes as Catalysts for Cosmic String Detection and Axion Dark Matter Genesis
A central black hole accelerates cosmic axion string loop decay, substantially shortening lifetimes and producing large axion and gravitational wave radiation for primordial black holes as small as 10^{-16} solar masses.
-
Gravity, Superselection Rules and Axions
Quantum gravity forces the QCD theta parameter to emerge as the vev of a local axion field through coherent-state representations of geometry and a quantum-information interpretation of topological-charge superselection.
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Implementation and commissioning of an experimental system towards sub-eV axion-like particle searches with 0.1 PW laser at ELI-NP
An integrated experimental system for sub-eV ALP searches using four-wave mixing has been commissioned and validated at ELI-NP with 20 mJ laser pulses at 1.3e-7 mbar vacuum.
-
The landscape of QCD axion models
Review classifies QCD axion models extending the standard mass-coupling window and updates bounds from cosmology, astrophysics, and experiments.
-
ALPSII Status Report
Status report on ALPS II experiment detailing recent progress in optical cavities, single-photon detection, magnets, and site infrastructure for axion-like particle searches.
-
Topological Susceptibility and QCD at Finite Theta Angle
A pedagogical review summarizing analytic predictions and recent lattice results for theta-dependence and topological susceptibility in QCD.