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Probing new physics using anomaly detection in multilepton events with the ATLAS detector
No full textThis poster presents the latest results from a competitive search for Beyond the Standard Model (BSM) physics in multilepton final states with four or more light leptons using data from the ATLAS detector at the LHC. Employing a novel anomaly detection strategy, this analysis is able to identify potential signals of BSM physics in a model-agnostic way. We establish exclusion limits for a variety of benchmark BSM scenarios, utilizing a template fit method applied to discriminating variables sensitive to anomalous events. Using the full ATLAS Run 2 dataset, this analysis demonstrates a level of sensitivity in constraining the parameter space of these models that approaches that of comparable dedicated searches optimized for each scenario. Furthermore, the derived model-independent limits underscore the versatility of this approach, demonstrating broad sensitivity to a range of potential new physics signals within the multilepton final state, thus offering a powerful tool for identifying unexpected phenomena
FPGA Programming Using LabVIEW - Hands-On Workshop at IdeaSquare
No full textFPGA Programming Using LabVIEW - Hands-On Workshop at IdeaSquar
Studies of beauty-quark production, hadronisation and cold nuclear matter effects in pp and p–Pb collisions with ALICE
No full textMeasurements of beauty-hadron production in ultrarelativistic hadronic collisions provide a fundamental tool for testing perturbative QCD calculations. Recent results at the LHC show that the beauty fragmentation function, as well as that of charm, is not universal across different collision systems. An extension of these studies to further energies, rapidities, and collision systems has thus become crucial. Additionally, studies in p–Pb collisions allow us to shed light on the role of cold nuclear matter effects on beauty production and their impact on beauty-quark hadronisation. The ALICE experiment investigates the beauty sector via high-precision measurements of non-prompt D mesons and Λ+c baryons and via the measurement of leptons from beauty-hadron decays. In these proceedings, the first studies of non-prompt over prompt production yield ratios of charm hadrons in pp collisions at √s = 13.6 TeV from the LHC Run 3 data taking are reported. Moreover, the final results on nonprompt charm baryon-over-meson and meson-over-meson production yield ratios in pp collisions at √s = 13 TeV and in p–Pb collisions at √sNN = 5.02 TeV are shown, as well as the nuclear modification factor of non-prompt D mesons and Λ+c baryons in p–Pb collisions. The total bb production cross section at midrapidity in pp collisions at 13 TeV is also presented
Enabling Heterogeneous Performance Analysis for Scientific Workloads
No full textHeterogeneous computing integrates diverse processing elements, such as CPUs, GPUs, and FPGAs, within a single system, aiming to leverage the strengths of each architecture to optimize performance and energy consumption. In this context, efficient performance analysis plays a critical role in determining the most suitable platform for dispatching tasks, ensuring that workloads are allocated to the processing units where they can execute most effectively. Adaptyst is a novel ongoing effort at CERN, with the aim to develop an open-source, architecture-agnostic performance analysis for scientific workloads. This study explores the performance and implementation complexity of two built-in eBPF-based methods such as Uprobes and USDT, with the aim of outlining a roadmap for future integration into Adaptyst and advancing toward heterogeneous performance analysis capabilities
Measurements of Drell--Yan processes with ATLAS
No full textPrecision measurements of Drell–Yan processes, including on-shell and off-shell W- and Z-boson production, offer key input to improve the understanding of QCD and the accuracy of PDFs. In addition, Drell–Yan measurements are instrumental for precision measurements of fundamental electroweak parameters, such as W boson mass measurement. This talk summarizes recent results from ATLAS on this topic
FameLab international final
No full textFameLab is a world-leading science communication competition, designed to inspire and showcase emerging talent in the art of making science accessible and engaging. Early-career professionals deliver a captivating three-minute presentation on a scientific topic of their choice, which will be judged on content, clarity and charisma. Originating in the UK and now held in over 30 countries, FameLab challenges scientists, researchers and communicators to break down complex ideas into clear, compelling stories. This year, the international final will take place at CERN. Finalists will be selected in national competitions worldwide and will go head-to-head live to win the title of best young science communicator
CAS, CERN Accelerator School, Beam Instrumentation, Croatia, 2025
No full textBeam Instrumentation is essential in any particle accelerator. Beam diagnostics allows the proper operation of the accelerator and enables further optimisation to reach challenging performance goals. This course provides a detailed understanding of how beam properties are measured and how the instrumentation is developed and operated. It is designed for laboratory and university staff and students, as well as manufacturers of accelerator equipment. The course is divided into lectures and practical "hands-on" sessions. The lectures focus on the typical diagnostics used in high- and low-energy linear and circular accelerators, together with application examples and elementary background on particle dynamics. The “hands-on” sessions provide opportunities to work in small groups with real equipment used for beam position measurements, beam profile diagnostics, radio frequency measurements, and digital signal processing
Catalysing Impact - Superconductivity for Global Challenges
No full textSuperconducting technologies, historically central to fundamental research, are increasingly relevant for applications in energy, healthcare, transportation, and computing. Recent advances suggest these technologies may contribute meaningfully to addressing critical societal challenges, such as, those outlined in the UN SDG-17 goals. Organized by CERN, in partnership with the Superconductivity Global Alliance (ScGA), a two-day event on December 1 and 2, 2025, examines the role of superconductors in enabling discovery science, assesses their potential in real-world applications, and considers pathways for accelerating their development. The event brings together top researchers, technologists, investors, and policymakers to align frontier science with practical needs