A5008237650- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Particle Detector Development and Performance
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Distributed and Parallel Computing Systems
- Stochastic processes and statistical mechanics
- Laser-induced spectroscopy and plasma
- Cosmology and Gravitation Theories
- International Science and Diplomacy
- Advanced NMR Techniques and Applications
- Plasma Diagnostics and Applications
- Advanced Data Storage Technologies
- Markov Chains and Monte Carlo Methods
- Particle accelerators and beam dynamics
- Advanced MRI Techniques and Applications
- Atomic and Molecular Physics
European Organization for Nuclear Research
2016-2024
École Polytechnique Fédérale de Lausanne
2023
Rutherford Appleton Laboratory
2015-2022
United Kingdom Atomic Energy Authority
2021
University of Manchester
2013-2018
Centro Brasileiro de Pesquisas Físicas
2013-2017
ETH Zurich
2017
UCLouvain
2017
Auburn University
2014
Dartmouth College
2012
Since 2015, with the restart of LHC for its second run data taking, LHCb experiment has been empowered a dedicated computing model to select and analyse calibration samples measure performance particle identification (PID) detectors algorithms. The novel technique was developed within framework innovative trigger experiment, which relies on online event reconstruction most datasets, reserving offline special physics cases. strategy process samples, includes data-processing scheme combining...
The LHCb collaboration has redesigned its trigger to enable the full offline detector reconstruction be performed in real time. Together with real-time alignment and calibration of detector, a software infrastructure make persistent high-level physics objects produced during processing, this redesign enabled widespread deployment analysis Run 2. We describe design 2 reconstruction, present data-driven performance measurements for representative sample LHCb's programme.
An evolved real-time data processing strategy is proposed for high-energy physics experiments, and its implementation at the LHCb experiment presented. The reduced event model allows not only signal candidate firing trigger to be persisted, as previously available, but also an arbitrary set of other reconstructed or raw objects from event. This higher rates a given output bandwidth, when compared traditional saving full detector each trigger, whilst accommodating inclusive triggers...
Precise knowledge of the location material in LHCb vertex locator (VELO) is essential to reducing background searches for long-lived exotic particles, and identifying jets that originate from beauty charm quarks. Secondary interactions hadrons produced beam-gas collisions are used map VELO. Using this map, along with properties a reconstructed secondary its constituent tracks, $p$-value can be assigned hypothesis originates interaction. A validation procedure presented using photon...
Summary A laser-light-scattering technique was used to measure a range of interfacial tensions (IFT's) from 1 10-3 mN/m in methane/propane gas-condensate system. The data were compared with the Weinaug-Katz (WK) and Hough-Stegemeier (HS) correlations. Results show that HS correlation performed better when on critical isotherm. On other isotherms, WK gave fit.
As power plant design programmes approach the transition between pre-conceptual and conceptual phases, systems code PROCESS has been improved to incorporate more detailed plasma physics, engineering, analysis modules. Unlike many codes, combines physics modelling with both technology costs analysis. Some of key topics in phase are toroidal field (TF) magnet design, divertor handling, operational sensitivity, economic uncertainty Models covering these areas have integrated or PROCESS. During...
La coherence attendue entre des traits de personnalité et d’une part choix carrière, d’autre préférences pour types culture organisationnelle a été examinée en termes parallélisme conceptuel différentiel. On s’est aperçu que, dans un grand échantillon d’adultes britanniques, les rapprochements dépendaient l’existence d’un recouvrement logique trait une préférence. Quand carrière ou dimension culturelle était logiquement reliéà in personnalité, variations interpersonelles sur ce étaient...
We report on a measurement of the flavor-specific $B^0_s$ lifetime and $D^-_s$ using proton-proton collisions at center-of-mass energies 7 8 TeV, collected by LHCb experiment corresponding to 3.0 $fb^{−1}$ integrated luminosity. Approximately 407 000 $B^0_s \to D^{(*)-}_s \mu^+\nu_{\mu}$ decays are partially reconstructed in $K^+ K^- \pi^- \mu^+$ final state. The natural widths determined using, as reference, kinematically similar same resulting differences between $B^0$ mesons $D^-$...
Data quality monitoring, DQM, is crucial in a high-energy physics experiment to ensure the correct functioning of experimental apparatus during data taking. DQM at LHCb carried out two phases. The first one performed on-site, real time, using unprocessed directly from detector, while second, also requires reconstruction selected by trigger system and occurs later. For LHC Run II taking collaboration has re-engineered protocols graphical interface, moving latter web-based monitoring system,...
Electron-impact ionization cross sections for the ground and excited states of N atom are calculated using non-perturbative R-matrix with pseudo-states time-dependent close-coupling (TDCC) methods, as well perturbative distorted-wave method. The TDCC results () configurations much larger than configuration. In all cases substantially lower results. section will lead to a better understanding moderately dense astrophysical laboratory plasmas containing nitrogen.
MBARI is currently developing an electrically propelled remotely operated vehicle (ROV) designed to carry science payloads 4000 meters ocean depth. Mission requirements for accurate navigation, precision maneuvering and extensive sensor capabilities place large demands on the data gathering control system. The ROV must operate reliably in extremely hostile environment while retaining enough flexibility support varied scientific missions a decade or more. An system architecture has been...
A new Thomson scattering system using standard commercially available components has been designed for the non-axisymmetric plasmas of Compact Toroidal Hybrid (CTH). The beam, generated by a frequency doubled Continuum PL DLS 2 J Nd:YAG laser, is passed vertically through an entrance Brewster window and aperturing baffle to minimize stray laser light that could enter collection optics. beam line with 8 m propagation distance mid-plane CTH device diameter kept less than 3 mm inside plasma...
The transmitted power spectra of commercial ultra-wideband (UWB) radios are subject to very strict low-emission mask requirement due their potential interfere with existing narrowband systems. On the other hand, ultra-short impulse transmission technologies, such as recently developed differential code-shifted-reference system, provide a promising time-domain transceiving technology for new UWB designs. Unfortunately, short often generates spectral spikes that force transmit back off more...
Remotely operated vehicle (ROV) control and data systems require that many specialized input/output (I/O) functions be reliably performed in the hostile ocean environment. MBARI's new scientific ROV Tiburon uses a system of I/O multiplexers are distributed around vehicle, connected to main computer by high-speed serial links. The perform fairly typical functions, but their hardware, software, packaging has been specifically optimized for mission. This paper describes design application these...
The LHCb Vertex Locator (VELO) is a silicon strip semiconductor detector operating at just 8mm distance to the LHC beams. Its 172,000 strips are read frequency of 1.1 MHz and processed by off-detector FPGAs followed PC cluster that reduces event rate about 10 kHz. During second run LHC, which lasts from 2015 until 2018, performance will undergo continued change due radiation damage effects. This necessitates detailed monitoring data quality avoid adverse effects on physics analysis...
This paper summarises a few selected topics discussed during Working Group 5 of DIS’17, Physics with Heavy Flavours, related to the study charm, bottom, and top quark physics. While programme this was structured by thematic areas, conference occasion for intense cross-pollination between traditionally disjoint research lines. The four LHC experiments all contribute heavy-flavour physics, some degree overlap in most while at other accelerators provide vital input areas phase space. Theorists...