ATLAS

Adriana Milic examines how the ATLAS liquid-argon calorimeter supports rapid event selection. After introducing its readout architecture, she explains the Phase-I change from analogue triggering to finely segmented digital Super Cells. Increased granularity, precision and dynamic range enable better background rejection during high-pile-up Run 3 collisions. Finer segmentation also changes signal-to-noise behaviour and the efficiency for low-energy deposits, creating distinct challenges in heavy-ion data taking. The seminar then considers Phase-II plans for greater bandwidth and full-calorimete

…the extension of tools developed for ATLAS to other research communities. Community presentations and technical discussion connect operational experience with future software development. 26 October at 12:00 to 30 October at 13:00; Europe/Zurich (CET, UTC+01:00).

…and tools such as ANGSD, ngsTools and Atlas. Sessions progress from samples and alignment files to allele frequencies, population structure, admixture, site-frequency spectra, inbreeding and demographic parameters. Exercises then identify natural-selection signals using diversity, differentiation and linkage statistics. Interactive lectures and independent practicals connect each method to its assumptions. Live online, 26–29

Davide Germani discusses how established field-theory techniques help interpret precise ATLAS and CMS measurements of heavy-quark systems. The first case concerns top–antitop states near their production threshold, drawing on recent calculations by Paolo Nason and collaborators. Topics include threshold resummation, nonperturbative QCD corrections, and the way the top quark’s short lifetime controls the formation and decay of quasi-bound states at collider energies. The second case examines whether X(3872) is a compact exotic hadron or a weakly bound neutral D-meson molecule. A comparison of t