International Linear Collider
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Search for heavy resonances decaying into four leptons with high Lorentz boosts in proton-proton collisions at
No full textA search for a high-mass resonance decaying into four-lepton final states via two intermediate bosons is presented. The search uses proton-proton collision data at a center-of-mass energy of collected by the CMS detector at LHC, corresponding to an integrated luminosity of . Signal hypotheses with a light intermediate boson may result in highly collimated decay products. Boosted electron pairs reconstructed into a single merged object are distinguished using a novel electron identification technique. A collimated muon pair may fail to reconstruct one of the tracks. In this case, the missing muon momentum is obtained from the missing transverse energy. No significant excess is observed. Model-independent upper limits on the product of cross section and branching ratio to four-leptons are set with and channels for from to and greater than at confidence level
EOS 2025 Workshop
No full textEOS is a powerful and flexible storage system, but setting up a new instance from scratch requires a solid understanding of its configuration and operational best practices. This talk will provide a step-by-step guide to deploying EOS, covering key components and essential configurations.
We will walk through the setup process, including storage provisioning, replication, erasure coding, and balancing strategies. The session will also touch on best practices for performance tuning and ensuring reliability in production environments.
This talk is ideal for system administrators and operators looking to gain practical insights into EOS deployment, whether for testing, small-scale clusters, or large production environments
Triboson and VBS results at ATLAS and CMS
No full textMeasurements of multiboson production at the LHC are important probes of the electroweak gauge structure of the Standard Model. Quartic electroweak gauge couplings can be probed in triboson production or the electroweak diboson production in association with two jets. A measurement VVjj production in the semi-leptonic final state as well as the production of three massive electroweak gauge bosons are discussed. These channels provide most stringent constraints on anomalous quartic gauge couplings. The talk will include ATLAS’ first study of polarised scattering of two W bosons with the same electric charge, a fundamental test of electroweak symmetry breaking with the Higgs mechanism
Long-Baseline Atom Interferometry
No full textLong-baseline atom interferometry is a promising technique for probing various aspects of fundamental physics, astrophysics and cosmology, including searches for ultralight dark matter (ULDM) and for gravitational waves (GWs) in the frequency range around 1~Hz that is not covered by present and planned detectors using laser interferometry. The MAGIS detector is under construction at Fermilab, as is the MIGA detector in France. The PX46 access shaft to the LHC has been identified as a very suitable site for an atom interferometer of height m, sites at the Boulby mine in the UK and the Canfranc Laboratory are also under investigation, and possible sites for km-class detectors have been suggested. The Terrestrial Very-Long-Baseline Atom Interferometry (TVLBAI) Proto-Collaboration proposes a coordinated programme of interferometers of increasing baselines
High energy probes of the initial stages
No full textThe matter produced in heavy-ion collisions undergoes a multiphase evolution, providing unique access to a variety of QCD matter properties. Hard probes, which penetrate the medium and carry away imprints of different phases, serve as a key tool for studying this evolution. While their interaction with the medium in the very first moments after a collision was historically assumed to be negligible, recent studies suggest otherwise. In this talk, I will review how hard probes interact with nuclear matter from the earliest stages of a heavy-ion collision onward. Using jets as an example, I will discuss how they lose energy and how their substructure is modified during the pre-equilibrium phases, comparing these effects with their interactions in the later quark-gluon plasma stage. Understanding these early-time interactions provides new insights into the thermalization process and the microscopic structure of the QCD medium
