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Recent Heavy Flavour results from ATLAS
No full textStudying heavy-flavour hadron properties provides a extensive tests for various QCD predictions as well as a means to probe the Standard Model validity. ATLAS experiment, being a general-purpose detector at LHC, is particularly successful in such measurements with final states involving muons, thanks to large collected integrated luminosity and precise muon reconstruction and triggering. This talk will overview the recent ATLAS results on heavy-flavour hadron production and decay properties and spectroscopy of exotic states
Concurrent Exploration of Axion-Like Particle Interactions with Gauge Bosons at the LHC
No full textAxion-like particles (ALPs) are pseudo Nambu-Goldstone bosons associated with spontaneously broken global symmetries incorporated in the Standard Model (SM) Lagrangian in many models beyond the SM. The existence of a light ALP is plausible due to the long-standing problems that the SM has not been able to address, such as the dark matter (DM) problem and the observed matter-antimatter asymmetry. There are many proposals in recent decades considering the ALP as a solution to some of these shortcomings. Motivated by such potential, we search for ALPs with a mass of 1 MeV at the LHC in a model-independent fashion. We explore two complementary production modes: ALP production in association with a pair of electroweak gauge bosons (ZZ or WW) and ALP production in association with a single gauge boson (W or Z) plus jets. For the VV+a final state, signal and dominant SM backgrounds are generated, and a realistic detector response simulation is performed. A multivariate analysis is employed to discriminate the VV+a signal from background processes, and the expected 95% confidence level (CL) exclusion limits in two-dimensional parameter spaces involving the ALP couplings are subsequently derived. The V+jets channel is interpreted using LHC measurements in regimes where the ALP escapes detection, appearing as missing energy. The two analyses are complementary: both the VV+a and the V+jets channels probe simultaneously the ALP couplings to gluons and to electroweak gauge bosons. While the VV+a channel offers clean multi-lepton final states and direct reconstruction of the ZZ or WW system, the V+jets channel benefits from larger production cross sections, enabling stronger constraints in certain regions of the parameter space. Comparing the limits obtained in this study with current and projected limits derived from LHC searches, it is seen that competitive sensitivities to the ALP couplings are achieved, and a significant region of previously unexplored parameter space becomes accessible.Axion-like particles (ALPs) are pseudo Nambu-Goldstone bosons associated with spontaneously broken global symmetries incorporated in the Standard Model (SM) Lagrangian in many models beyond the SM. The existence of a light ALP is plausible due to the long-standing problems that the SM has not been able to address, such as the dark matter (DM) problem and the observed matter-antimatter asymmetry. There are many proposals in recent decades considering the ALP as a solution to some of these shortcomings. Motivated by such potential, we search for ALPs with a mass of 1 MeV at the LHC in a model-independent fashion. We explore two complementary production modes: ALP production in association with a pair of electroweak gauge bosons ( or ) and ALP production in association with a single gauge boson ( or ) plus jets. For the final state, signal and dominant SM backgrounds are generated, and a realistic detector response simulation is performed. A multivariate analysis is employed to discriminate the signal from background processes, and the expected confidence level (CL) exclusion limits in two-dimensional parameter spaces involving the ALP couplings are subsequently derived. The +jets channel is interpreted using LHC measurements in regimes where the ALP escapes detection, appearing as missing energy. The two analyses are complementary: both the and the +jets channels probe simultaneously the ALP couplings to gluons and to electroweak gauge bosons. While the channel offers clean multi-lepton final states and direct reconstruction of the or system, the +jets channel benefits from larger production cross sections, enabling stronger constraints in certain regions of the parameter space
CS3 2025 - Cloud Storage Synchronization and Sharing
No full textOpenCloud comes with a never before seen level of integration with the underlying storage system. It allows transparently accessing files on a posix filesystem. The new driver allows users to either work with OpenCloud or use external tools that directly access files on the storage. Local filesystems as well as enterprise network filesystems have already been integrated. OpenCloud picks up changes in real time and notifies all clients that have access. In this presentation we will show the available options and explain some of the technical details
CS3 2025 - Cloud Storage Synchronization and Sharing
No full textWhen proprietary products are discontinued or bought up by competitors, your own (decision-making) freedom can quickly become precarious. A discontinued product forces you to migrate, incurs costs, and imposes unwelcome decisions.
Not so with open source software: it offers me the freedom to develop the code further at any time, either on my own or with new partners, and to set up new support chains. The freedom not to have to migrate and the freedom not to have to work with an unpleasant service provider. Even drastic changes in product and business strategy can be avoided by taking matters into your own hands.
At least that's the theory. But does it work in practice?
This report is about a very recent case: about software that wasn't supposed to die, and a team that absolutely wanted to continue. It also shows where theory meets practice and the headwinds you have to face when you just go for it. But: a community has to do what a community has to do. And that can also mean: let's fork
Les Houches 2023 - Physics at TeV Colliders: Report on the Standard Model Precision Wishlist
No full textLes Houches returned to an in-person format in 2023 and the bi-yearly tradition of updating the standard model precision wishlist has continued. In this work we review recent progress (since Les Houches 2021) in fixed-order computations for LHC applications. In addition, necessary ingredients for such calculations such as parton distribution functions, amplitudes, and subtraction methods are discussed. Finally, we indicate processes and missing higher-order corrections that are required to reach the theoretical accuracy that matches the anticipated experimental precision