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2025-10-29
05:00
Exploring the magnetic landscape of easily-exfoliable two-dimensional materials / Haddadi, Fatemeh (Ecole Polytechnique, Lausanne) ; Campi, Davide (Milan Bicocca U.) ; Santos, Flaviano dos (PSI, Villigen ; Ecole Polytechnique, Lausanne) ; Mounet, Nicolas (Ecole Polytechnique, Lausanne ; CERN) ; Ponet, Louis (Ecole Polytechnique, Lausanne) ; Marzari, Nicola (Ecole Polytechnique, Lausanne) ; Gibertini, Marco (U. Modena (main) ; Neuroscience Institute, Italy)
Magnetic materials often exhibit complex energy landscapes with multiple local minima, each corresponding to a self-consistent electronic structure solution. [...]
arXiv:2509.09531. -
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2025-10-29
04:59
A Dynamic Energy-Based Hysteresis Model for Pulsed-Operated Fast-Ramping Magnets / Moll, Dominik (Darmstadt, Tech. U.) ; D'Angelo, Laura A.M. (Darmstadt, Tech. U.) ; De Gersem, Herbert (Darmstadt, Tech. U.) ; Boattini, Fulvio (CERN) ; Bottura, Luca (CERN) ; Gast, Marco (KIT, Karlsruhe)
Due to the strongly nonlinear behavior of ferromagnetic yokes, the numerical analysis of fast-ramping magnets is highly cumbersome and, therefore, in practice overly simplified by means of anhysteretic material descriptions and a posteriori loss formulae. [...]
arXiv:2509.04115. - 6.
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2025-10-29
04:37
Constrained instantons in scalar field theories / Elder, Benjamin (Imperial Coll., London) ; Gawrych, Kinga (Imperial Coll., London) ; Rajantie, Arttu (CERN ; Imperial Coll., London)
Instantons, localised saddle points of the action, play an important role in describing non-perturbative aspects of quantum field theories, for example vacuum decay or violation of conservation laws associated with anomalous symmetries. [...]
CERN-TH-2025-211 ; Imperial-TP-2025-KG-1 ; arXiv:2510.21922. - 30.
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2025-10-28
06:13
Measurement of the ratio of the B$_\mathrm{c}^+$ $\to$ J/$\psi$ $\tau^+ν_\tau$ and B$_\mathrm{c}^+$ $\to$ J/$\psi$ $\nu^+ν_\nu$ branching fractions using three-prong $\tau$ lepton decays / CMS Collaboration
The ratio between the B$_\mathrm{c}^+$$\to$ J/$ψ$$τ^+ν_τ$ and B$_\mathrm{c}^+$$\to$ J/$ψ$$μ^+ν_μ$ branching fractions is measured using a data sample of proton-proton collisions collected by CMS at a center-of-mass energy of 13 TeV in the years 2016$-$2018 and corresponding to an integrated luminosity of 138 fb$^{-1}$. [...]
arXiv:2510.21559 ; CMS-BPH-23-001 ; CERN-EP-2025-196. - 35.
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2025-10-28
05:00
TeraAgent: A Distributed Agent-Based Simulation Engine for Simulating Half a Trillion Agents / Breitwieser, Lukas (ETH, Zurich (main)) ; Hesam, Ahmad (Delft Tech. U.) ; Yağlıkçı, Abdullah Giray (ETH, Zurich (main)) ; Sadrosadati, Mohammad (ETH, Zurich (main)) ; Rademakers, Fons (CERN) ; Mutlu, Onur (ETH, Zurich (main))
Agent-based simulation is an indispensable paradigm for studying complex systems. [...]
arXiv:2509.24063. - 15.
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2025-10-28
05:00
Federation of Agents: A Semantics-Aware Communication Fabric for Large-Scale Agentic AI / Giusti, Lorenzo (CERN) ; Werner, Ole Anton (CERN) ; Taiello, Riccardo (CERN) ; Costa, Matilde Carvalho (CERN) ; Tosun, Emre (CERN) ; Protani, Andrea (CERN) ; Molina, Marc (CERN) ; de Almeida, Rodrigo Lopes (CERN) ; Cacace, Paolo (CERN) ; Santos, Diogo Reis (CERN) et al.
We present Federation of Agents (FoA), a distributed orchestration framework that transforms static multi-agent coordination into dynamic, capability-driven collaboration. [...]
arXiv:2509.20175. - 18.
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2025-10-27
19:43
Measurement of the Higgs boson production in association with top quarks in multilepton final states in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
A measurement of the associated production of a top-quark pair with the Higgs boson ($t\bar{t}H$) in multilepton final states is presented. [...]
CERN-EP-2025-239. - 2025
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2025-10-27
17:35
Constraints on effective field theories via quadruple-differential angular decay rates from $t$-channel single-top-quark production at $\sqrt{s}=13$ TeV with the ATLAS detector
Events with $t$-channel single top quarks are used to probe effective field theory operators in $\sqrt{s}=13$ TeV proton-proton collision data corresponding to 140 fb$^{-1}$ recorded by the ATLAS detector at the Large Hadron Collider. [...]
CERN-EP-2025-208. - 2025
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2025-10-25
09:48
Holography of K-complexity: Switchbacks and Shockwaves / Ambrosini, Marco (U. Geneva (main)) ; Rabinovici, Eliezer (Hebrew U. ; CERN) ; Sonner, Julian (U. Geneva (main))
In this paper we study Krylov complexity in the presence of single and multiple operators in the DSSYK model, where we can use the analytical techniques coming from chord diagrammatics. [...]
arXiv:2510.17975 ; CERN-TH-2025-206. - 84.
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2025-10-25
09:47
From Partons to Strings: Scattering on the Coulomb Branch of $\mathcal{N}=4$ SYM / Alday, Luis F. (Oxford U., Inst. Math.) ; Armanini, Elisabetta (CERN ; EPFL, Lausanne, FSL) ; Häring, Kelian (Delta ITP, Amsterdam) ; Zhiboedov, Alexander (CERN)
We study scattering on the Coulomb branch of planar ${\mathcal{N}}=4$ SYM at finite 't Hooft coupling. [...]
CERN-TH-2025-202 ; arXiv:2510.19909. - 109.
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