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Axions and axion-like particles are hypothetical particles predicted in extensions of the standard model and are promising cold dark matter candidates. The Any Light Particle Search (ALPS II) experiment is a light-shining-through-the-wall…

In the last years it has been realized, that extensions of the Standard Model may manifest itself also at meV energy scales. The low energy frontier is a rich complement to the conventional high-energy particle physics landscape. The search…

High Energy Physics - Experiment · Physics 2010-07-01 Klaus Ehret

At DESY the ALPS II experiment is being installed in the HERA tunnel to search for axion like particles (ALPs). A laser beam will be injected into a string of superconducting HERA dipole magnets, to produce ALPs. After passing a light tight…

Axions and other very light axion-like particles appear in many extensions of the Standard Model, and are leading candidates to compose part or all of the missing matter of the Universe. They also appear in models of inflation, dark…

High Energy Physics - Phenomenology · Physics 2018-08-01 Igor G. Irastorza , Javier Redondo

Hidden sector particles with sub-GeV masses like hidden U(1) gauge bosons, the NMSSM CP-odd Higgs, and other axion-like particles are experimentally little constrained as they interact only very weakly with the visible sector. For masses…

High Energy Physics - Phenomenology · Physics 2010-08-27 Sarah Andreas , Andreas Ringwald

Light pseudoscalars interacting pre-dominantly with Standard Model gauge bosons (so-called axion-like particles or ALPs) occur frequently in extensions of the Standard Model. In this work we review and update existing constraints on ALPs in…

High Energy Physics - Phenomenology · Physics 2018-01-08 Matthew J. Dolan , Torben Ferber , Christopher Hearty , Felix Kahlhoefer , Kai Schmidt-Hoberg

The detection of very high-energy (VHE) gamma rays from the active galaxy M87 by LHAASO, showing a possible spectral hardening around $20$ TeV, motivates the search for new physics beyond standard emission models. One promising candidate is…

High Energy Astrophysical Phenomena · Physics 2026-04-01 A. Pratts , D Avila Rojas , J. Serna-Franco , M. M. González , R. Alfaro

Physics beyond the Standard Model predicts the possible existence of new particles that can be searched at the low energy frontier in the sub-eV range. The OSQAR photon regeneration experiment looks for "Light Shining through a Wall" from…

The search for axions and axion-like particles (ALPs) remains a major endeavor in modern physics investigation. Axions play essential roles in the quest to understand dark matter, the strong CP problem, and various astrophysical phenomena.…

High Energy Physics - Phenomenology · Physics 2024-12-13 Maurizio Giannotti

Axion-like particles (ALPs) are light, neutral, pseudo-scalar bosons predicted by several extensions of the Standard Model of particle physics -- such as the String Theory -- and are supposed to interact primarily only with two photons. In…

High Energy Astrophysical Phenomena · Physics 2019-11-22 Giorgio Galanti

The Any Light Particle Search II (ALPS II) requires a sensitive detection of 1064 nm photons. Thus, a low dark count rate (DC) and a high detection efficiency (DE) is needed. ALPS has set up a transition-edge sensor (TES) detector system,…

Instrumentation and Detectors · Physics 2019-08-20 Jan Dreyling-Eschweiler

Photon regeneration experiments searching for signatures of oscillations of photons into hypothetical very weakly interacting ultra-light particles, such as axions, axion-like and hidden-sector particles, have improved their sensitivity…

High Energy Physics - Phenomenology · Physics 2015-05-18 Andreas Ringwald

Axionlike particles (ALPs) and dark photons (DPs) are viable dark matter particle candidates. We have searched for possible ALP/DP signals in the PandaX-4T liquid xenon detector using 440 kg$\cdot$yr of data. A binned likelihood fit is…

Axionlike particles (ALPs) are a common prediction of theories beyond the Standard Model of particle physics that could explain the entirety of the cold dark matter. These particles could be detected through their mixing with photons in…

High Energy Astrophysical Phenomena · Physics 2019-08-14 Manuel Meyer

The Standard Model has achieved significant success in particle physics; however, there are still some unresolved puzzles beyond it. This motivates the exploration of the dark sector. We present the recent dark sector search results from…

High Energy Physics - Experiment · Physics 2025-07-31 Zhijun Li , Zhengyun You

We present a detailed study of the oscillations and optical properties for vacuum, in a model for the dark sector that contains axion-like particles and hidden photons. In this model, both can couple to photons. We provide bounds for the…

High Energy Physics - Phenomenology · Physics 2017-10-25 Pedro Diego Alvarez , Paola Arias , Carlos Maldonado

The dark matter and existence of new particles are now a possible explanation of several physics phenomena which evade the predictions of the Standard Model. In this context Axion-Like-Particles (ALP) with masses in the MeV to GeV range…

High Energy Physics - Experiment · Physics 2026-01-23 M. Zielinski , K. Proscinski , P. Salabura

The current Large Hadron Collider (LHC) data show no clear indication of new physics and only incremental improvements are anticipated at the energy frontier in the near future. However, while the focus of the LHC has been on constraining…

High Energy Physics - Phenomenology · Physics 2025-10-10 Amit Adhikary , Aoife Bharucha , Lorenzo Feligioni , Michele Frigerio

Axion-like particles (ALPs) are attracting increasing interest since, among other things, they are a prediction of many extensions of the standard model of elementary particles physics and in particular of superstrings and superbranes.…

High Energy Astrophysical Phenomena · Physics 2019-07-23 Giorgio Galanti , Marco Roncadelli

We review topics in searches for axion-like-particles (ALPs), covering material that is complementary to other recent reviews. The first half of our review covers ALPs in the extreme environments of neutron star cores, the magnetospheres of…

High Energy Physics - Phenomenology · Physics 2021-06-16 Jean-François Fortin , Huai-Ke Guo , Steven P. Harris , Doojin Kim , Kuver Sinha , Chen Sun