The talk will give an overview of LHC probes of Axion-Like Particles (ALPs), whose couplings are parameterized via effective interactions of dimension larger than 5. The first part will introduce the main motivations for studying ALPs and it will discuss the main properties of the ALP EFT, while the second will be dedicated to phenomenological aspects. This will contain a general overview of how ALPs can be searched at colliders, as well as brief discussions of theory constraints stemming from perturbative unitarity and of recent new ideas brought forward in the field, such as the use of non-resonant ALP production in constraining ALP couplings to heavy SM states, and the exploration of ALP couplings beyond dimension-5.

I will present semi-discrete path-conservative central-upwind (PCCU) schemes for ideal and shallow water magnetohydrodynamics (MHD) equations. These schemes possess several important properties: they locally preserve the divergence-free constraint, they do not rely on any (approximate) Riemann problem solver, and they robustly producehigh-resolution and non- oscillatory results. The derivation of the schemes is based on the Godunov-Powell nonconservative modifications of the studied MHD systems. The local divergence-free property is enforced by augmenting the modified systems with the evolution equations for the corresponding derivatives of the magnetic field components. These derivatives are then used to design a special piecewise linear reconstruction of the magnetic field, which guarantees a non- oscillatory nature of the resulting scheme. In addition, the proposed PCCU discretization accounts for the jump of the nonconservative product terms across cell interfaces, thereby ensuring stability. I will also discuss the extension of the proposed schemes to magnetic rotating shallow water equations. The new scheme is both well-balanced and exactly preserves the divergence- free condition of the magnetic field. The well-balanced property is enforced by applying a flux globalization approach within the PCCU scheme. As a result, both still- and moving- water equilibria can be exactly preserved at the discrete level. The proposed PCCU schemes are tested on several benchmarks. The obtained numerical results illustrate the performance of the new schemes, their robustness, and their ability not only to achieve high resolution, but also preserve the positivity of computed quantities such as density, pressure, and water depth. The talk is based on joint works with Alina Chertock (North Carolina State University, USA), Michael Redle (RWTH Aachen University, Germany),Kailiang Wu (Southern University of Science and Technology, China) and Vladimir Zeitlin (Sorbonne University, France).

Spintronics has emerged as a promising field for the development of energy-efficient magnetic memory and logic devices by controlling spin states in ferromagnets via spin-orbit coupling1,2. Efficient control of magnetization in ferromagnets is crucial for high-performance spintronic devices, and magnons have gained renewed interest as a potential avenue for achieving this goal with reduced Joule heating and minimized power consumption. In pursuit of this objective, Previous efforts have focused on optimizing magnon transport with minimal dissipation under the belief that dissipation hinders efficient magnetization control. In contrast, we present an unconventional approach that harnesses magnon dissipation for magnetization control instead of suppressing it. Our approach involves a heterostructure consisting of a ferromagnetic metal and an antiferromagnetic insulator, exploiting an intrinsic spin current within the ferromagnetic metal3,4. By combining a single ferromagnetic metal with an antiferromagnetic insulator that breaks spin transport symmetry while preserving charge transport symmetry, we achieve significant spin-orbit torques comparable to those observed in non-magnetic metals, enabling magnetization switching. Through systematic experiments and comprehensive analysis, we confirm that our findings arise from magnon dissipation within the AFI rather than external spin sources. These results provide novel insights into the mechanisms of spin current generation and dissipation, opening up new possibilities for developing energy-efficient spintronic devices. Reference 1. Sinova, J. et al. Rev. Mod. Phys. 87, 1213–1260 (2015). 2. Shao, Q. et al. IEEE. Trans. Magn. 57, 1–39 (2021). 3. Hibino, Y. et al. Nat. Commun. 12, 6254 (2021). 4. Wang, W. et al. Nat. Nanotechnol. 14, 819–824 (2019).