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Related papers: Lecture Notes: Probing ultralight axion-like parti…

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We propose new perspective in searching for axion-like particles (ALPs) from quark and lepton flavor physics: measurements of the time-dependent CP asymmetry in $B^0 \to K_S^0 \pi^0 \gamma$ and the branching ratio of $B_s \to e^\pm \mu^\mp$…

High Energy Physics - Phenomenology · Physics 2021-05-26 Hiroyuki Ishida , Shinya Matsuzaki , Yoshihiro Shigekami

We study the collider phenomenology of leptophilic axion-like particles (ALPs), i.e. pseudoscalar particles that couple only to charged leptons. Loops of charged leptons induce effective interactions of the ALPs with photons, which depend…

High Energy Physics - Phenomenology · Physics 2025-11-11 Alexander Eberhart , Marco Fedele , Felix Kahlhoefer , Eike Ravensburg , Robert Ziegler

The existence of an axion-like particle (ALP) would induce anomalous scattering of light by light. This process can be probed at the Large Hadron Collider in central exclusive production of photon pairs in proton-proton collisions by…

High Energy Physics - Phenomenology · Physics 2018-08-01 Cristian Baldenegro , Sylvain Fichet , Gero von Gersdorff , Christophe Royon

Although axion-like particles (ALPs) are popular dark matter candidates, their mass generation mechanisms as well as cosmic thermal evolutions are still unclear. In this letter, we propose a new mass generation mechanism of ALP during the…

High Energy Physics - Phenomenology · Physics 2022-10-25 Wei Chao , Mingjie Jin , Hai-Jun Li , Ying-Quan Peng

Ultra-light axion-like particle (ULAP) is one of attractive candidates for cold dark matter. Because the de Broglie wavelength of ULAP with mass $\sim 10^{-22} {\rm eV}$ is $\mathcal{O}({\rm kpc})$, the suppression of the small scale…

Cosmology and Nongalactic Astrophysics · Physics 2020-02-05 Masahiro Kawasaki , Wakutaka Nakano , Eisuke Sonomoto

The Axion Like Particle (ALP) is a hypothetical pseudo-scalar particle beyond the Standard Model, with a compelling possible connection to dark matter and early universe physics. ALPs can be converted into photons via interactions with…

High Energy Astrophysical Phenomena · Physics 2020-03-04 Ryo Yamamoto , Noriko Y. Yamasaki , Kazuhisa Mitsuda , Masahiro Takada

Axion-like particles (ALPs) are promising candidates for mediating interactions between a dark sector and the Standard Model (SM). In this work, considering the effective interactions of ALPs with the SM gauge bosons and a fermion dark…

High Energy Physics - Phenomenology · Physics 2025-05-02 Subhaditya Bhattacharya , Sahabub Jahedi , Soumen Kumar Manna , Arunansu Sil

In this note we look at the time evolution of signals in axion dark matter experiments from a quantum perspective. Our aim is not to contribute new results to the general discussion of the quantum/classical connection (which we do not) but…

High Energy Physics - Phenomenology · Physics 2023-04-06 Joerg Jaeckel , Valentina Montoya , Cedric Quint

We perform a comprehensive analysis of dark matter-nucleon scattering via the exchange of axion-like particles (ALPs). At first sight, this might appear of little practical use, as non-relativistic scattering through pseudo-scalar…

High Energy Physics - Phenomenology · Physics 2026-02-27 Wim Beenakker , Daniël Mikkers , Anh Vu Phan , Susanne Westhoff

Burrage, Davis, and Shaw recently suggested exploiting the correlations between high and low energy luminosities of astrophysical objects to probe possible mixing between photons and axion-like particles (ALP) in magnetic field regions.…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-21 Guido Walter Pettinari , Robert Crittenden

The nature of dark matter is an unsolved cosmological problem and axions are one of the weakly interacting cold dark matter candidates. Axions or ALPs (Axion-like particles) are pseudo-scalar bosons predicted by beyond-standard model…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-31 Harsh Mehta , Suvodip Mukherjee

String theory compactifications may generate many light axion-like particles (ALPs) with weak couplings to electromagnetism. In general, a large number of ALPs may exist, with a linear combination having a potentially observable coupling to…

High Energy Physics - Phenomenology · Physics 2022-01-13 Francesca Chadha-Day

Ultralight axionlike dark matter (ALDM) is a leading candidate in the dark matter realm, characterized by its prominent wave properties on astronomical scales. Pulsar timing arrays (PTAs) and Pulsar polarization arrays (PPAs) aim to detect…

Cosmology and Nongalactic Astrophysics · Physics 2026-03-03 Ximeng Li , Yonghao Liu , Zu-Cheng Chen , Shi Dai , Boris Goncharov , Xiao-Song Hu , Qing-Guo Huang , Tao Liu , Jing Ren , Yu-Mei Wu , Xiao Xue , Xingjiang Zhu

Axion like particles (ALPs) are fundamental pseudo scalar particles with properties similar to Axions which are a well-known extension of the standard model to solve the strong CP problem in Quantum Chromodynamics. ALPs can oscillate into…

High Energy Astrophysical Phenomena · Physics 2017-10-30 Jhilik Majumdar , Francesca Calore , Dieter Horns

Cosmological mechanisms that yield ultralight dark matter are insensitive to the intrinsic parity of a bosonic dark matter candidate, but that same quantity plays a crucial role in a direct detection experiment. The modification of…

High Energy Physics - Phenomenology · Physics 2021-09-20 Christopher M. Donohue , Susan Gardner , Wolfgang Korsch

The elegant solutions to the strong CP problem predict the existence of a particle called axion. Thus, the search for axion like particles (ALP) has been an ongoing endeavor. The possibility that these axion like particles couple to photons…

The existence of axion-like particles (ALPs) can be probed from their signatures in the Cosmic Microwave Background (CMB) due to the photon-ALP resonant conversion over the mass range of ALPs that matches with the effective mass of photons…

Cosmology and Nongalactic Astrophysics · Physics 2025-08-22 Harsh Mehta , Suvodip Mukherjee

Several extensions of the Standard Model predict the existence of Axion-Like Particles (ALPs), very light spin-zero bosons with a two-photon coupling. ALPs can give rise to observable effects in very-high-energy astrophysics. Above roughly…

High Energy Astrophysical Phenomena · Physics 2015-06-05 Marco Roncadelli , Alessandro De Angelis , Giorgio Galanti

We propose a novel experimental scheme, called DAMSA (Dump-produced Aboriginal Matter Searches at an Accelerator), for searching for dark-sector particles, using rare nuclear isotope accelerator facilities that provide high-flux proton…

An axion-like-particle (ALP) in the post-inflationary scenario with domain wall number $N>1$ can be dark matter if the residual $\mathbb{Z}_N$ symmetry has a small explicit breaking. Although we cannot determine the full dynamics of the…

High Energy Physics - Phenomenology · Physics 2023-05-24 Marco Gorghetto , Edward Hardy
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