A5106550529- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Nuclear physics research studies
- Distributed and Parallel Computing Systems
- Stochastic processes and statistical mechanics
- Radiation Detection and Scintillator Technologies
- Astrophysics and Cosmic Phenomena
- International Science and Diplomacy
- Advanced Data Storage Technologies
- Advanced NMR Techniques and Applications
- Nuclear Physics and Applications
- Markov Chains and Monte Carlo Methods
- Particle accelerators and beam dynamics
- Algorithms and Data Compression
University of Liverpool
2016-2025
State Key Laboratory of Nuclear Physics and Technology
2020-2023
Peking University
2020-2023
Imperial College London
2014-2023
University of Michigan–Ann Arbor
2022
Universidade Federal do Rio de Janeiro
2003-2021
University of Chinese Academy of Sciences
2020
Tsinghua University
2020
Central China Normal University
2020
Institute of High Energy Physics
2020
The Vertex Locator (VELO) is a silicon microstrip detector that surrounds the proton-proton interaction region in LHCb experiment. performance of during first years its physics operation reviewed. system operated vacuum, uses bi-phase CO2 cooling system, and sensors are moved to 7 mm from LHC beam for data taking. stability these characteristic features described, details material budget given. calibration timing processing algorithms implemented FPGAs described. fully characterised. have...
Proceedings of ISMD08
The Standard Model is the theory used to describe interactions between fundamental particles and forces. It remarkably successful at predicting outcome of particle physics experiments. However, has not yet been completely verified. In particular, one most vital constituents, Higgs boson, observed. This paper describes Model, experimental tests that have led its acceptance shortcomings.
Abstract The LHCb detector has undergone a major upgrade for LHC Run 3. This Upgrade I facilitates operation at higher luminosity and utilises full-detector information the collision rate, critically including use of vertex information. A new locator system, VELO Upgrade, been constructed. core element are double-sided pixelated hybrid silicon modules which operate in vacuum close to beam high radiation environment. construction quality assurance tests these described this paper. incorporate...
This article describes the high-speed system designed to meet challenging requirements for readout of new pixel VErtex LOcator (VELO) upgraded LHCb experiment. All elements electronics chain will be renewed cope with requirement ~40-MHz full-event rate. The sensors equipped VeloPix ASICs and placed at ~5 mm from Large Hadron Collider (LHC) beams in a secondary vacuum tank an extremely high nonhomogeneous radiation environment. front-end (FE) highest occupancy have pixel-hit rates above ~900...
The ATLAS High Level Trigger's (HLT) primary function of event selection will be accomplished with a Level-2 trigger farm and an filter (EF) farm, both running software components developed in the offline reconstruction framework. While this approach provides unified framework for selection, it poses strict requirements on critical trigger. A decision must typically within 10 ms multiple processing concurrent threads. To address these constraints, prototypes have been that incorporate...
Following rigorous software design and analysis methods, an object-based architecture has been developed to derive the second- third-level trigger decisions for future ATLAS detector at LHC. The functional components within this system responsible generating elements of are algorithms running architecture. Relevant aspects reviewed along with concrete examples specific their performance in "vertical" slices various physics selection strategies.
The new LHCb Vertex Locator (VELO) for LHCb, comprising a pixel detector and readout electronics, will be installed in 2021 data taking Run 3 at the LHC. electronics centers around "VeloPix" ASIC front-end operating trigger-less 40MHz. A custom serializer, called gigabit wireline transmitter (GWT), associated protocol have been designed VeloPix. GWT are sent from serializers of VeloPix line rate 5.12 Gb/s, reaching total 2–3 Tb/s full VELO detector. Data over 300-m optic-fiber links to...
Given the extremely high output rate foreseen at LHC and general-purpose nature of ATLAS experiment, an efficient flexible way to select events in High Level Trigger is needed. An solution proposed that allows for early rejection unwanted easily configurable choose algorithms specify criteria trigger decisions. It implemented standard object-oriented software framework, Athena. The achieved by breaking decision process down into sequential steps. configuration each step defines sequences...
The Large Hadron Collider beauty (LHCb) detector is designed to detect decays of b- and c- hadrons for the study CP violation rare decays. At end LHC Run 2, many LHCb measurements remained statistically dominated. In order increase trigger yield purely hadronic channels, hardware will be removed, read out at 40 MHz. This, in combination with five-fold luminosity, requires radical changes LHCb's electronics, and, some cases, replacement entire sub-detectors state-of-the-art technologies....
The LHCb detector has undergone a major upgrade for LHC Run 3. This Upgrade I facilitates operation at higher luminosity and utilises full-detector information the collision rate, critically including use of vertex information. A new locator system, VELO Upgrade, been constructed. core element are double-sided pixelated hybrid silicon modules which operate in vacuum close to beam high radiation environment. construction quality assurance tests these described this paper. incorporate 200 \mum...
Particle physics explores the structure of matter by studying behaviour its most fundamental constituents. Despite remarkable success our theories, there remains much that is but unexplained. One pressing questions concerns origin mass. Our favoured theoretical explanation for existence mass also predicts a particle has never been seen-the Higgs boson. In this review, we survey knowledge boson and explain why, if theory correct, should expect to make first observation elusive in next few...
The trigger and data-acquisition system of ATLAS, a general-purpose experiment at the Large Hadron Collider (LHC), will be based on three levels online selection. Starting from bunch-crossing rate 40 MHz (an interaction 1 GHz design luminosity-/spl sim/ 10/sup 34/ cm/sup -2/s/sup -1/), first level (LVL1) reduce to about 75 kHz using purpose-built hardware. An additional factor 3/ in reduction is provided by high-level triggers (HLTs) system, with two main functional components: second-level...
We have measured the W and Z boson production cross-sections in proton-proton collisions at a centre-of-mass energy of 7 TeV, using datasets up to approximately 1 fb -1 collected by LHCb experiment.All measurements are based on decays with least one lepton final state, which has transverse momentum p T exceeding 20 GeV pseudorapidity η within 2.0 -4.5.W bosons reconstructed muons.Z electron, muon or tau pairs, where invariant mass m lies range 60 ≤ 120 GeV.In all cases results consistent...