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Integration of the ACTS track reconstruction toolkit in the ATLAS software for HL-LHC operations
No full textIn view of the High-Luminosity LHC era the ATLAS experiment is carrying out an upgrade campaign which foresees the installation of a new all-silicon Inner Tracker (ITk) and the modernization of the reconstruction software. Track reconstruction will be pushed to its limits by the increased number of proton-proton collisions per bunch-crossing and the granularity of the ITk detector. In order to remain within CPU budgets while retaining high physics performance, the ATLAS Collaboration plans to use ACTS, an experiment-independent toolkit for track reconstruction. The migration to ACTS involves the redesign of the track reconstruction components as well as the ATLAS Event Data Model (EDM), resulting in a thread-safe and maintainable software. In this contribution, the current status of the ACTS integration for the ATLAS ITk track reconstruction is presented, with emphasis on the improvements of the track reconstruction software and the implementation of the ATLAS EDM
Measurements of the Upsilon(1S) meson production in association with a Z boson in proton-proton collisions at sqrt(s)=13 TeV
No full textThe first measurement of the associated production of an (1S) meson with a Z boson using the four-muon final state is presented. The analysis is based on proton-proton data at , collected with the CMS detector in 2016--2018 and corresponding to an integrated luminosity of . Using the production of the Z boson decaying into four muons as a normalization channel, we measure the ratio of the fiducial cross section to the fiducial cross section . The ratio is found to be . We also perform a calculation of the effective double-parton scattering cross section, , which is found to be mb. In addition, we measure differentially, first as a function of the transverse momentum of the (1S) meson, and then as a function of the transverse momentum of the Z boson
Parton distributions confront LHC Run II data: a quantitative appraisal
No full textWe present a systematic comparison of theoretical predictions and various high-precision experimental measurements, specifically of differential cross sections performed by the LHC run II for Drell-Yan gauge boson, top-quark pair, single-inclusive jet and di-jet production, and by HERA for single-inclusive jet and di-jet production. Theoretical predictions are computed at next-to-next-to-leading order (NNLO) accuracy in perturbative Quantum Chromodynamics. The most widely employed sets of Parton Distribution Functions (PDFs) are used, and PDF, strong coupling, and missing higher order uncertainties are taken into account. We quantitatively assess the predictive power of each PDF set and the contribution of the different sources of experimental and theoretical uncertainty to the agreement between data and predictions. We show that control over all of these aspects is crucial to precision physics studies, such as the determination of Standard Model parameters at the LHC
HiLumi Cryomagnets Assembly, LQXFA/B-02 received at CERN
No full textHiLumi magnets assembly in SMI2, LQXFA/B-02 has been fabricated and tested at FNAL and it has been shipped to CERN. After its arrival at CERN it has went through the initial inspection and it is ready for the acceptance by CERN
International Conference on Quantum Technologies for High-Energy Physics
No full text* Synopsis : Olivier Ezratty will present the state of the art of quantum computing across various qubit modalities and algorithms classes, and how the academic and industry vendor ecosystem is planning to build utility-grade fault-tolerant quantum computers in the next decades. He will frame the wealth of challenges ahead related to qubit quality at scale, manufacturing, quantum error correction, quantum computers interconnect, resource estimations, energetic footprints, as well as on algorithms design and software engineering.
* Speaker : Olivier Ezratty is a freelance quantum engineer, author, trainer, teacher and researcher, mostly known for “Understanding Quantum Technologies”, his comprehensive open-source book on quantum technologies (September 2021, 2022, 2023 and 2024, 1,554 pages). He is a teacher and lecturer on quantum and classical technologies at EPITA, CentraleSupelec, ENS Paris-Saclay, and other Universities. He works for a diverse set of government institutions and industry organizations, as a referent expert for Bpifrance, Agence Nationale de Recherche (France), the European Commission (European Quantum Flagship) and venture capital funds. He is also one of the cofounders of the Quantum Energy Initiative. He has an Msc in Computer Science from CentraleSupelec
AIDAinnova Course on Quantum Applications
No full textThis training consists of two parts.
First, I will briefly present my career path, starting with my work on particle detectors, moving through financial risk management, and culminating in quantum computing at IBM.
Second, we will explore how a quantum computer processes information using the laws of quantum mechanics. I will review the concepts of superposition, entanglement, and interference. Additionally, I will introduce the quantum circuit as a model for quantum computation. We will also discuss various applications of quantum computing and their potential relevance to particle detectors. Finally, we will learn how to execute quantum applications using the Qiskit quantum information software kit on the quantum processing units provided by IBM Quantum.
D. Egger. Senior Research Scientist, IBM Quantum, Zurich
Minutes and additional material for tutorial: https://indico.cern.ch/event/1441944/timetable/?note=313163&view=standard#7-quantum-computing-and-its-a
Precise Predictions for Event Shapes in Diphoton Production at the LHC
No full textPhoton pair production is an important benchmark process at the LHC, entering Higgs boson studies and new physics searches. It has been measured to high accuracy, allowing for detailed studies of event shapes in diphoton final states. To enable precision physics with diphoton event shapes, we compute the second-order QCD corrections, , to them and study their phenomenological impact