interTwin’s Post

📃Scientific paper: Axion-like particles and high-energy gamma rays: interconversion revisited Abstract: Axion-like particles (ALPs) are hypothetical entities often invoked to solve various problems in particle physics to cosmology. They are one of the most promising candidates to explain the elusive dark matter. A way to search for ALPs is through their effects on photons. In the presence of external magnetic fields, ALPs and photons can convert into one another, leading to measurable signals. In this contribution we present results of Monte Carlo simulations of ALP-photon interconversion in magnetised environments. We focus on high-energy gamma rays with TeV energies travelling over cosmological distances. We include a full treatment of the intergalactic electromagnetic cascades triggered by the gamma rays. Finally, we discuss the impact of this improved treatment of the propagation for current and future ALP searches. ;Comment: Presented at the 38th International Cosmic Ray Conference (ICRC2023) Discover the rest of the scientific article on es/iode ➡️https://etcse.fr/8wg

It is a great pleasure to share with you, the first announcement of the 21st #conference in the series "Recent Developments in Gravity" (NEB) to be held in the island of Corfu, 1-4 September 2025. The 21st conference "Recent Developments in Gravity" (NEB) is co-organized by the Hellenic Society for Relativity, Gravitation and Cosmology (HSRGC) and the Research Laboratory "Mathematical Physics and Computational Statistics" of the Ionian University. The topics of the conference include #Gravitational #Waves, #Relativistic #Astrophysics, #Alternative Theories of #Gravity, #Mathematical #Relativity, #Cosmology, #Quantum #Gravity. Stay tuned for the next announcements and further details about the conference.

🚀#mdpisymmetry #featurepaper Excited to share a Feature Paper with you. "Review on Higgs Hidden–Dark Sector Physics at High-Energy Colliders" 🔸https://lnkd.in/gsPdtJnk 🔹Author: Theodota Lagouri CERN 🔸Abstract: The presence of a hidden or dark sector of phenomena that relates either weakly or in a particular way to Standard Model (SM) fields has theoretical as well as experimental support. Many extensions of SM use hidden or dark sector states to propose a specific candidate for dark matter (DM) in the universe or to explain astrophysical findings... #Higgs #beyondstandardmodel #darkmatter Physics Section of Symmetry

🚀#mdpisymmetry #featurepaper Excited to share a Feature Paper with you. "Review on Higgs Hidden–Dark Sector Physics at High-Energy Colliders" 🔸https://lnkd.in/gsPdtJnk 🔹Author: Theodota Lagouri CERN 🔸Abstract: The presence of a hidden or dark sector of phenomena that relates either weakly or in a particular way to Standard Model (SM) fields has theoretical as well as experimental support. Many extensions of SM use hidden or dark sector states to propose a specific candidate for dark matter (DM) in the universe or to explain astrophysical findings... #beyondstandardmodel #Higgs #highenergy #Colliders Physics and Symmetry Section

📃Scientific paper: Constraining models of hadronic showers using proton-Oxygen collisions at the LHC involving proton/neutron tagging Abstract: The study of hadronic showers, which are produced by cosmic rays penetrating the Earth's atmosphere, is essential for shedding light on the origins and characteristics of high-energy particles originating from space and reaching our planet. At the Large Hadron Collider at CERN, there are plans to conduct a short run of proton--oxygen collisions in 2025 to refine the modeling of hadronic showers. This work explores the potential impact on constraining models of hadronic showers by measuring interactions facilitated by color-neutral objects such as photons, pomerons, and pions. These interactions are often characterized by high-energy protons or neutrons produced at forward rapidities and can be tagged using dedicated forward proton and neutron detectors. ;Comment: 4 pages, 5 figures, proceedings of the XVIII International Conference on Topics in Astroparticle and Underground Physics (TAUP 2023) Continued on ES/IODE ➡️ https://etcse.fr/gvDf ------- If you find this interesting, feel free to follow, comment and share. We need your help to enhance our visibility, so that our platform continues to serve you.

Survey science changed the way we study the universe. Did you know the Kavli Institute for Cosmological Physics (KICP) has focused on survey science since its start? Survey science, which kicked off in the 1980s with new telescopes that could capture large swaths of the sky, enables scientists to learn unique characteristics about the universe like what it looked like before the Big Bang in its primordial state. 🌌 Learn more about the KICP and the impact of survey science here: https://lnkd.in/gydhwMqf

I have teamed up with historian of physics Carla Almeida to look into the history of the Hawking effect and the use of analogy to understand its intricacies and try and observe it in the laboratory, check out our article here: https://lnkd.in/d2AchFrS

Existence of Purely Alvén Waves in Magnetic Flux Tubes with Arbitrary Cross-Sections | Article by Michael S. Ruderman and Nikolai S. Petrukhin https://lnkd.in/gCH3dqSJ The University of Sheffield; Space Research Institute (IKI), Russian Academy of Sciences; Lomonosov Moscow State University (MSU); Higher School of Economics; MDPI #plasma #magnetohydrodynamics #AlfvénWaves #magnetic #physics #openaccess This article belongs to the Special Issue A Themed Issue in Honor of Professor Marcel Goossens on the Occasion of His 75th Birthday https://lnkd.in/eQhx9x5A #Abstract We study linear torsional Alfvén waves in a magnetic flux tube with an arbitrary cross-section. We assume that the equilibrium magnetic field is propagating in the z-direction in Cartesian coordinates 𝑥,𝑦, and z. The tube cross-section is bounded by a smooth closed curve. Both plasma and magnetic field are homogeneous outside this curve. The magnetic field magnitude is a function of x and y, while the density is a product of two functions: one dependent on z and the other dependent on x and y. As a result, the Alfvén speed is also equal to 𝑉0(𝑥,𝑦) times a function of z. We define Alfvén waves as waves that do not disturb plasma density. We show that these waves can exist only when the magnetic field magnitude is a function of 𝑉0. When the condition of existence of Alfvén waves is satisfied, the waves are polarised in the directions tangent to the level lines of 𝑉0(𝑥,𝑦) and orthogonal to the equilibrium magnetic field. We found that the Alfvén wave amplitude has a specific form that depends on a particular coordinate system.

The improved version of the paper "“Dark Matter”, “Dark Energy”, and Other Problems in Physics Today": https://lnkd.in/dedxmMS5