The LHCb upgrade I

Abstract

The LHCb upgrade represents a major change of the experiment. The detectors have been almost completely renewed to allow running at an instantaneous luminosity five times larger than that of the previous running periods. Readout of all detectors into an all-software trigger is central to the new design, facilitating the reconstruction of events at the maximum LHC interaction rate, and their selection in real time. The experiment's tracking system has been completely upgraded with a new pixel vertex detector, a silicon tracker upstream of the dipole magnet and three scintillating fibre tracking stations downstream of the magnet. The whole photon detection system of the RICH detectors has been renewed and the readout electronics of the calorimeter and muon systems have been fully overhauled. The first stage of the all-software trigger is implemented on a GPU farm. The output of the trigger provides a combination of totally reconstructed physics objects, such as tracks and vertices, ready for final analysis, and of entire events which need further offline reprocessing. This scheme required a complete revision of the computing model and rewriting of the experiment's software.

All figures and tables, along with any supplementary material and additional information, are available at http://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-DP-2022-002.html (LHCb public pages)

References in corpus (43)

• Scikit-learn: Machine Learning in Python
• A Brief Introduction to PYTHIA 8.1
• LHCb Detector Performance
• The LHCb Trigger and its Performance in 2011
• Performance of the LHCb RICH detector at the LHC
• Implications of LHCb measurements and future prospects
• Performance of the LHCb muon system
• Measurement of the track reconstruction efficiency at LHCb
• Precision luminosity measurements at LHCb
• Selection and processing of calibration samples to measure the particle identification performance of the LHCb experiment in Run 2
• Design and performance of the LHCb trigger and full real-time reconstruction in Run 2 of the LHC
• Tesla : an application for real-time data analysis in High Energy Physics
• Analytical models of probability distribution and excess noise factor of Solid State Photomultiplier signals with crosstalk
• Allen: A high level trigger on GPUs for LHCb
• Performance of the Muon Identification at LHCb
• ReDecay: A novel approach to speed up the simulation at LHCb
• The global covariance matrix of tracks fitted with a Kalman filter and an application in detector alignment
• Generative Models for Fast Calorimeter Simulation.LHCb case
• A comprehensive real-time analysis model at the LHCb experiment
• The Scikit HEP Project -- overview and prospects
• Application of vertex and mass constraints in track-based alignment
• Amplitude analysis of the ${\Lambda }_c^{+}\to p{K}^{-}{\pi }^{+}$ decay and ${\Lambda }_c^{+}$ baryon polarization measurement in semileptonic beauty hadron decays
• Van der Meer Scan Luminosity Measurement and Beam-Beam Correction
• A Comparison of CPU and GPU implementations for the LHCb Experiment Run 3 Trigger
• Observation of a ${\Lambda }_b^0-{\overline{\Lambda }}_b^0$ production asymmetry in proton-proton collisions at $\sqrt{s}=7\text{ and }8\text{TeV}$
• Fast Data-Driven Simulation of Cherenkov Detectors Using Generative Adversarial Networks
• A FPGA-based architecture for real-time cluster finding in the LHCb silicon pixel detector
• Microchannel cooling for the LHCb VELO Upgrade I
• An MPI-Based Python Framework for Distributed Training with Keras
• Performance of the LHCb RICH detectors during LHC Run 2
• Long-term Operation of the Multi-Wire-Proportional-Chambers of the LHCb Muon System
• Measurement of the electron reconstruction efficiency at LHCb
• Search for the radiative ${\Xi }_b^{-}\to {\Xi }^{-}\gamma$ decay
• Muon identification for LHCb Run 3
• Search for the lepton-flavour violating decays $B^0\to K^{\ast 0}{\mu }^{\pm }{e}^{\mp }$ and $B_s^0\to \varphi {\mu }^{\pm }{e}^{\mp }$
• A fast and efficient SIMD track reconstruction algorithm for the LHCb Upgrade 1 VELO-PIX detector
• Characterisation of signal-induced noise in Hamamatsu R11265 Multianode Photomultiplier Tubes
• Testbeam studies of pre-prototype silicon strip sensors for the LHCb UT upgrade project
• A parametrized Kalman filter for fast track fitting at LHCb
• The Beam Conditions Monitor of the LHCb Experiment
• The readout supervisor firmware for controlling the upgraded LHCb detector and readout system
• Signal coupling to embedded pitch adapters in silicon sensors
• Proposal on Application of the Multi-Wire Proportional Chambers of the LHCb MUON Detector at Very High Rates for the Future Upgrades

Cited by in corpus (25)

• High-density gas target at the LHCb experiment
• The LHCb Sprucing and Analysis Productions
• First observation of ${\Lambda }_b^0\to {\Sigma }_c^{(\ast )++}{D}^{(\ast )-}{K}^{-}$ decays
• Search for resonance-enhanced $CP$ and angular asymmetries in the ${\Lambda }_c^{+}\to p{\mu }^{+}{\mu }^{-}$ decay at LHCb
• Luminosity measurement with the LHCb RICH detectors in Run 3
• First Measurement of the Decay Dynamics in the Semileptonic Transition of the $D^{+(0)}$ into the Axial-vector Meson ${\bar{K}}_1(1270)$
• Long-lived particle reconstruction downstream of the LHCb magnet
• Summary of the trigger systems of the Large Hadron Collider experiments ALICE, ATLAS, CMS and LHCb
• Scalable Multi-Task Learning for Particle Collision Event Reconstruction with Heterogeneous Graph Neural Networks
• First observation of the ${\Lambda }_b^0\to {\Lambda }_c^{+}{D}_s^{-}{K}^{+}{K}^{-}$ decay and search for pentaquarks in the ${\Lambda }_c^{+}{D}_s^{-}$ system
• Metal Foil Detectors assembly for the beam and background monitoring in the LHCb experiment
• A Downstream and vertexing algorithm for Long Lived Particles (LLP) selection at the first High-level trigger (HLT1) of LHCb
• An Automated Bandwidth Division for the LHCb Upgrade Trigger
• First observation of the ${\overline{B}}_s^0\to {\Lambda }_c^{+}{\overline{\Lambda }}_c{}^{-}$ decay and evidence for the ${\overline{B}}^0\to {\Lambda }_c^{+}{\overline{\Lambda }}_c{}^{-}$ decay
• Precision measurement of CP violation and branching fractions in $B^{\pm }\to K_{\mathrm{S}}^0{h}^{\pm }$ $(h=\pi ,K)$ decays and search for the rare decay $B_c^{\pm }\to K_{\mathrm{S}}^0{K}^{\pm }$
• Probing mixed-state dark matter and flavor observables in a scalar-assisted baryonic gauge theory
• Performance of the LHCb muon detector in Run 3
• Hard Probes in Ultraperipheral Collisions at LHCb
• Exotic hadrons associated with $b$-quark
• A parallel algorithm for fast reconstruction of primary vertices on heterogeneous architectures
• Observation of the doubly charmed baryon ${\Xi }_{cc}^{+}$ with the LHCb Run 3 detector
• Operation and performance of the Probe for Luminosity Measurement at LHCb
• Using Open Source EDA Tools in ASICs for HEP: A Mixed Comparison
• Minimising Event Size, Maximising Physics: Inclusive Particle Isolation for LHCb's Run 3
• Model-independent unbinned analysis of $B\to K^{\ast }(\to K^{+}{\pi }^{-}){\mu }^{+}{\mu }^{-}$: zeroes, bounds, Wilson coefficients and symmetries