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Jules COLAS12/11/2026, 13:20Invited Presentation
Cryogenic detectors are of great interest to search for the elusive signal induced by a light dark matter particle impinging inside a target material. Unfortunately, every cryogenic experiment with a very low energy threshold is limited by a low-energy excess background known as LEE whose origin is not totally understood to this date. The proposal of the TESSERACT collaboration is to bring...
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Junu Jeong (Stockholm University)12/11/2026, 13:40Invited Presentation
Plasma haloscopes offer a compelling methodology for probing higher-mass axions, particularly above 10 GHz---a parameter space strongly favored by recent post-inflationary cosmological simulations. Utilizing wire metamaterial resonators, the ALPHA collaboration is preparing for its Phase 1 run, with the first scientific run anticipated in early 2028, to target the 10 to 20 GHz frequency range....
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Tobias Schiffer (University of Bonn (DE))12/11/2026, 14:00Invited Presentation
The sun could be a large axion emitter and thus an interesting object to study for axion searches. The International AXion Observatory (IAXO), as a next-generation axion helioscope, aims exactly for that purpose. The experiment will host a $20\,\text{m}$ long magnet with eight magnet bores and will be able to follow the sun for 12 hours per day. Each magnet bore will be equipped with a...
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Kristof Schmieden (University of Bonn (DE))12/11/2026, 14:20Invited Presentation
The SUPerconducting AXion search experiment, SUPAX, is a new axion haloscope currently being built at the University of Bonn to search for axion and axion-like particle dark matter in the microwave regime. The experiment will operate inside a 12 T superconducting solenoid at a base temperature of about 10 mK and will employ tunable microwave cavities covering resonance frequencies from 2 GHz...
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Giacomo D'Amico12/11/2026, 14:40Invited Presentation
Axion-like particles (ALPs) are well-motivated extensions of the Standard Model that can induce photon–ALP oscillations in the presence of external magnetic fields. For very-high-energy (VHE) gamma rays, these oscillations may leave observable signatures in the spectra of astrophysical sources, such as energy-dependent flux fluctuations or spectral hardening at TeV energies.
We present a...
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Dionysios Antypas (University of Crete)12/11/2026, 15:25Oral Presentation
Axionlike dark matter may generate an oscillating pseudomagnetic field
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through its gradient coupling to fermion spins. We report on the results
of a recent search [1] for this interaction using a
radio-frequency $^{87}\mathrm{Rb}$ atomic magnetometer, whose Larmor
frequency is scanned to provide broadband sensitivity. The measurement
probes axionlike-particle (ALP) masses... -
Giacomo D'Amico12/11/2026, 15:40Oral Presentation
In the past decade, indirect searches for particle dark matter with gamma-ray experiments have placed stringent constraints on the annihilation cross section or decay lifetime across a wide range of dark matter masses. These limits depend critically on the astrophysical J factor, which encodes the dark matter distribution in the target and typically dominates the systematic uncertainty. As...
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ippei obata12/11/2026, 15:55Oral Presentation
In this talk, I will present a novel method for probing Majoron dark matter using optical interferometry, such as that employed in gravitational wave detectors. The Majoron is a (pseudo-) Nambu-Goldstone boson that arises when a Majorana neutrino mass term is generated through the spontaneous breaking of a global Lepton symmetry, and has been proposed as a viable dark matter candidate in our...
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Masahiro Kawasaki12/11/2026, 16:10Oral Presentation
We investigate the formation of dark matter primordial black holes (PBHs) from two types of axion-like fields. In the first scenario, an axion-like field plays the role of the inflaton. We study PBH formation in axion inflation with a bumpy potential using lattice simulations. In particular, we compute the power spectrum of curvature perturbations in the strong backreaction regime and show...
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Shunsuke Neda (Institute for Cosmic Ray Research, The University of Tokyo)12/11/2026, 16:25Oral Presentation
Non-topological solitons arising in theories beyond the Standard Model can generate sizable Poisson density fluctuations in the early Universe. If the solitons temporarily dominate the energy density, these fluctuations grow during the resulting early matter-dominated era and can collapse into primordial black holes (PBHs), providing a possible origin of dark matter. Previous studies of this...
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Dr Patrick Fitzpatrick (Department of Physics & Astronomy, University of New Hampshire)12/11/2026, 16:40Oral Presentation
The apparent fine-tunings of the Standard Model Higgs potential may be a consequence of its near-criticality. If its parameters are selected by an underlying mechanism that places the theory near criticality, then the scale of vacuum instability sets an upper bound on the Higgs mass. This reframes the hierarchy problem as a consequence of vacuum metastability and predicts new physics that...
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