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Summary of the trigger systems of the Large Hadron Collider experiments ALICE, ATLAS, CMS and LHCb
Johannes Albrecht, Leon Bozianu, Lukas Calefice +11
In modern High Energy Physics (HEP) experiments, triggers perform the important task of selecting, in real time, the data to be recorded and saved for physics analyses. As a result…
Graph Neural Network-Based Track Finding in the LHCb Vertex Detector
Anthony Correia, Fotis I. Giasemis, Nabil Garroum +2
The next decade will see an order of magnitude increase in data collected by high-energy physics experiments, driven by the High-Luminosity LHC (HL-LHC). The reconstruction of char…
Technical design report for the CODEX- demonstrator
b collaboration, Giulio Aielli, Juliette Alimena +56
The CODEX- apparatus is a demonstrator for the proposed future CODEX-b experiment, a long-lived-particle detector foreseen for operation at IP8 during HL-LHC data-taking. The de…
Graph Neural Network-Based Pipeline for Track Finding in the Velo at LHCb
Anthony Correia, Fotis I. Giasemis, Nabil Garroum +2
Over the next decade, increases in instantaneous luminosity and detector granularity will amplify the amount of data that has to be analysed by high-energy physics experiments, whe…
Evolution of the energy efficiency of LHCb's real-time processing
Roel Aaij, Daniel Hugo Cámpora Pérez, Tommaso Colombo +7
The upgraded LHCb detector, due to start datataking in 2022, will have to process an average data rate of 4~TB/s in real time. Because LHCb's physics objectives require that the fu…
A Comparison of CPU and GPU implementations for the LHCb Experiment Run 3 Trigger
R. Aaij, M. Adinolfi, S. Aiola +157
The LHCb experiment at CERN is undergoing an upgrade in preparation for the Run 3 data taking period of the LHC. As part of this upgrade the trigger is moving to a fully software i…
A fast and efficient SIMD track reconstruction algorithm for the LHCb Upgrade 1 VELO-PIX detector
Arthur Hennequin, Benjamin Couturier, Vladimir Gligorov +3
The upgraded CERN LHCb detector, due to start data taking in 2021, will have to reconstruct 4 TB/s of raw detector data in real time using commodity processors. This is one of the…
Allen: A high level trigger on GPUs for LHCb
R. Aaij, J. Albrecht, M. Belous +26
We describe a fully GPU-based implementation of the first level trigger for the upgrade of the LHCb detector, due to start data taking in 2021. We demonstrate that our implementati…
Conceptualization, implementation, and commissioning of real-time analysis in the High Level Trigger of the LHCb experiment
Vladimir Vava Gligorov
LHCb is a general purpose forward detector located at the Large Hadron Collider (LHC) at CERN. Although initially optimized for the study of hadrons containing beauty quarks, the b…
Tesla : an application for real-time data analysis in High Energy Physics
R. Aaij, S. Amato, L. Anderlini +18
Upgrades to the LHCb computing infrastructure in the first long shutdown of the LHC have allowed for high quality decay information to be calculated by the software trigger making…
Real-time data analysis at the LHC: present and future
Vladimir V. Gligorov
The Large Hadron Collider (LHC), which collides protons at an energy of 14 TeV, produces hundreds of exabytes of data per year, making it one of the largest sources of data in the…
The upgrade of the LHCb trigger system
Johannes Albrecht, Conor Fitzpatrick, Vladimir Gligorov +1
The LHCb experiment will operate at a luminosity of cms during LHC Run 3. At this rate the present readout and hardware Level-0 trigger become a limi…
Efficient, reliable and fast high-level triggering using a bonsai boosted decision tree
Vladimir Vava Gligorov, Mike Williams
High-level triggering is a vital component in many modern particle physics experiments. This paper describes a modification to the standard boosted decision tree (BDT) classifier,…
Charged Particle Tracking with the Timepix ASIC
Kazuyoshi Akiba, Marina Artuso, Ryan Badman +39
A prototype particle tracking telescope has been constructed using Timepix and Medipix ASIC hybrid pixel assemblies as the six sensing planes. Each telescope plane consisted of one…