The Large Hadron Collider (LHC) at CERN is well known for the massive amounts of physical data it produces. In this project, we collaborate with physicists from the LHCb collaboration and address the data processing needs that arise there.
The main objective of the C5 project is to develop new methods to realise the data processing tasks within LHCb. We also strive to adapt existing methods to understand whether/how they would apply in the context of LHCb. A very important aspect of the project is to evaluate methods in an environment like the one at CERN; specifically, we are only interested in solutions that will carry to a very large scale (such as thousands of compute nodes). The other angle of the project is to connect the application domain with methodology established within the CRC; examples are the use of compact data summaries (e.g., to avoid scanning huge amounts of data), streaming algorithms (e.g., the “trigger stage” at LHCb has to ingest a high-volume data stream and react with real-time characteristics), or the consideration of low-power platforms.
The project entered the CRC at phase 2. During that phase, we developed solutions to individual, isolated problems within LHCb. We proposed, e.g., new GPU-based algorithms; a novel filter mechanism (named DeLorean); and parallelisation mechanisms for LHCb analyses (including a tailor-made low-power hardware platform). Our umbrella goal for phase 3 is to connect those solutions towards a new design for the overall processing pipeline at LHCb. To this end, we want to, e.g., integrate our parallel data selection engine DeLorean with a Map-Reduce-based analysis framework and extend both parts by GPU acceleration.
| Aaij/etal/2020c |
Aaij, Roel and Mödden, Antje and others.
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Stefan Noll and Jens Teubner and Norman May and Alexander Böhm.
Analyzing Memory Accesses With Modern Processors.
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2020.
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| Noll/Teubner/2020a |
Stefan Noll and Jens Teubner and Norman May and Alexander Böhm.
Shared Load(ing): Efficient Bulk Loading into Optimized Storage.
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| Kotthaus/etal/2019a |
Tözün, Pinar and Kotthaus, Helena.
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| Kotthaus/etal/2019b |
Kotthaus, Helena and Schönberger, Lea and Lang, Andreas and Chen, Jian-Jia and Marwedel, Peter.
Can Flexible Multi-Core Scheduling Help to Execute Machine Learning Algorithms Resource-Efficiently?.
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Kotthaus, Helena and Vitek, Jan.
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| Aaij/etal/2018b |
LHCb Collaboration and Aaij, R. and Birnkraut, A. and Eitschberger, U. and Schellenberg, M. and Spaan, B. and Stevens, H. and et al..
Measurement of $CP$ violation in $B^0\rightarrow D^\mp\pi^\pm$ decays.
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| Lindemann/2018a |
Lindemann, Thomas.
Efficient Track Reconstruction on Modern Hardware.
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| Lindemann/etal/2018a |
Thomas Lindemann and Jonas Kauke and Jens Teubner.
Efficient Stream Processing of Scientific Data.
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| Ruhe/etal/2018b |
Ruhe, Tim and Schellenberg, Margarete and Spaan, Bernhard.
Application of the Dortmund Spectrum Estimation Algorithm to LHCb Monte Carlo Simulations.
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| Aaij/etal/2016k |
Aaij, R., ..., Schellenberg, M. et al..
Search for the $C\!P$-violating strong decays $\eta \to \pi^+\pi^-$ and $\eta^\prime(958) \to \pi^+\pi^-$.
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Aaij, R.,..., Schellenberg, M. et al..
Observation of $J/\psi\phi$ structures consistent with exotic states from amplitude analysis of $B^+\to J/\psi \phi K^+$ decays.
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First experimental study of photon polarization in radiative $B^0_s$ decays.
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| Aaij/etal/2016t |
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Observation of $B^+\rightarrow J/\psi 3\pi^+ 2\pi^-$ and $B^+\rightarrow \psi(2S) \pi^+\pi^+\pi^-$ decays.
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| Aaij/etal/2016u |
Aaij, R.,..., Schellenberg, M. et al..
Observation of the decay $B^0_s \to \phi\pi^+\pi^-$ and evidence for $B^0 \to \phi\pi^+\pi^-$.
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| Aaij/etal/2016v |
LHCb Collaboration and Aaij, R. and Eitschberger, U. and Schellenberg, M. and Spaan, B. and et al..
New algorithms for identifying the flavour of $\mathrm B ^0$ mesons using pions and protons.
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Aaij, R.,..., Schellenberg, M. et al..
Observation of the annihilation decay mode $B^0\to K^+K^-$.
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Aaij, R.,..., Schellenberg, M. et al..
Search for decays of neutral beauty mesons into four muons.
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| Aaij/etal/2016y |
Aaij, R.,..., Schellenberg, M. et al..
Measurement of the $b$-quark production cross-section in 7 and 13 TeV $pp$ collisions.
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Aaij, R.,..., Schellenberg, M. et al..
Observation of the suppressed decay $\Lambda^0_b\rightarrow p\pi^-\mu^+\mu^-$.
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| Aaij/etal/2017a |
LHCb Collaboration and Aaij, R. and Schellenberg, M. and Spaan, B. and Stevens, H. and et al..
Measurement of $CP$ violation in $B^0\rightarrow J/\psi K^0_ \mathrmS $ and $B^0\rightarrow\psi(2S) K^0_\mathrmS$ decays.
In
Journal of High Energy Physics,
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| Dorok/etal/2017a |
Sebastian Dorok and Sebastian Breß and Jens Teubner and Horstfried Läpple and Gunter Saake and Volker Markl.
Efficient Storage and Analysis of Genome Data in Databases.
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2017.
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| Dorok/etal/2017b |
Sebastian Dorok and Sebastian Breß and Jens Teubner and Horstfried Läpple and Gunter Saake and Volker Markl.
Efficiently Storing and Analyzing Genome Data in Database Systems.
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| Goertz/etal/2017a |
Görtz, Michael Dominik and Kühn, Roland and Zietek, Oliver and Bernhard, Roman and Bulinski, Michael and Duman, Dennis and Freisen, Benedikt and Jentsch, Uwe and Klöppner, Tobias and Popovic, Dragana and Xu, Lili.
Energy Efficiency of a Low Power Hardware Cluster for High Performance Computing.
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| Kussmann/etal/2017a |
Kussmann, Michael and Berens, Maximilian and Eitschberger, Ulrich and Kilic, Ayse and Lindemann, Thomas and Meier, Frank and Niet, Ramon and Schellenberg, Margarete and Stevens, Holger and Wishahi, Julian and Spaan, Bernhard and Teubner, Jens.
DeLorean: A Storage Layer to Analyze Physical Data at Scale.
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| Aaij/etal/2016a |
Aaij, R., ..., Schellenberg, M. et al..
First study of the CP -violating phase and decay-width difference in $B_B^0\to \psi(2S)\phi$ decays.
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| Aaij/etal/2016b |
Aaij, R., ..., Schellenberg, M. et al..
Measurement of forward $W\to e\nu$ production in $pp$ collisions at $ \sqrt[]s=8\,$ TeV.
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Vol. 10,
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| Aaij/etal/2016d |
Aaij, R., ..., Schellenberg, M. et al..
Search for structure in the $B_s^0\pi^\pm$ invariant mass spectrum.
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| Aaij/etal/2016e |
Aaij, R., ..., Schellenberg, M. et al..
Measurement of the ratio of branching fractions $ \mathcalB (B_c^+ \to J/\psi K^+)/\mathcalB(B_c^+ \to J/\psi\pi^+)$.
In
JHEP,
Vol. 09,
pages 153,
2016.
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| Aaij/etal/2016g |
Aaij, R., ..., Schellenberg, M. et al..
Measurement of the $B_s^0 \rightarrow J/\psi \eta$ lifetime.
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pages 484-492,
2016.
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| Aaij/etal/2016h |
Aaij, R., ..., Schellenberg, M. et al..
Study of $B_c^+$ decays to the $K^+K^-\pi^+$ final state and evidence for the decay $B_c^+\to\chi_c0\pi^+$.
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| Aaij/etal/2016j |
Aaij, R., ..., Schellenberg, M. et al..
Amplitude analysis of $B^- \to D^+ \pi^- \pi^-$ decays.
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| Aaij/etal/2016l |
Aaij, R., ..., Schellenberg, M. et al..
Measurement of the CKM angle $\gamma$ from a combination of LHCb results.
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| Aaij/etal/2016m |
Aaij, R.,..., Schellenberg, M. et al..
Measurements of the S-wave fraction in $B^0\rightarrow K^+\pi^-\mu^+\mu^-$ decays and the $B^0\rightarrow K^\ast(892)^0\mu^+\mu^-$ differential branching fraction.
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| Aaij/etal/2016p |
Aaij, R.,..., Schellenberg, M. et al..
Measurement of the forward Z boson production cross-section in pp collisions at $\sqrt[]s = 13$ TeV.
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| Aaij/etal/2016q |
LHCb Collaboration and Aaij, R. and Meier, F. and Schellenberg, M. and Spaan, B. and et al..
Measurement of $CP$ violation in $B^0 \to D^+ D^-$ decays.
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| Aaij/etal/2016s |
Aaij, R.,..., Schellenberg, M. et al..
Differential branching fraction and angular moments analysis of the decay $B^0 \to K^+ \pi^- \mu^+ \mu^-$ in the $K^*_0,2(1430)^0$ region.
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| Bress/etal/2016a |
Sebastian Breß and Henning Funke and Jens Teubner.
Robust Query Processing in Co-Processor-Accelerated Databases.
In
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2016.
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| Aaij/etal/2015a |
LHCb Collaboration and Aaij, R. and Adeva, B. and Adinolfi, M. and Affolder, A. and Spaan, B. and et al..
Measurement of C P Violation in $B^0 \to J /\psi K_S^0$ Decays.
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| Schellenberg/2019a |
Schellenberg, Margarete.
Measurement of CP violation in the decay $B^0 \rightarrow D^\ast\pm D^\mp$ with data from the LHCb experiment.
TU Dortmund,
2019.
|
| Eitschberger/2018a |
Eitschberger, Ulrich Paul.
Flavour-tagged Measurement of CP Observables in $B_s^0 \rightarrow D_s^\mp K^\pm$ Decays with the LHCb Experiment.
TU Dortmund,
2018.
|
| Niet/2018a |
Niet, Ramon.
Measurements of 𝑪𝑷 Violation in $𝑩^0\rightarrow [𝒄𝒄]𝑲_S^0$ Transitions at LHCb.
2018.
|
| Meier/2016a |
Frank Meier.
Measurement of $\sin2 \beta$ using charmonium and open charm decays at LHCb.
TU Dortmund University,
2016.
|
| Swientek/2015a |
Swientek, Stefan.
A data processing firmware for an upgrade of the Outer Tracker detector at the LHCb experiment.
TU Dortmund,
2015.
|
| Schleich/2011a |
Schleich, Sebastian.
First measurement of the inclusive $\phi$ meson production cross section in pp collisions at $\sqrt s = 7$ TeV and search for CP-violation in the $B_s\rightarrow\phi\phi$ decay at LHCb.
TU Dortmund,
2011.
|
| Balkesen/Teubner/2014a |
Cagri Balkesen and Jens Teubner and Gustavo Alonso and M. Tamer Öszu.
Main-Memory Hash Joins on Modern Processor Architectures.
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2014.
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| Aaij/B/2013a |
Aaij, R and andere (inkl. Spaan, B. (LHCb Collaboration)).
Measurement of the time-dependent $CP$ asymmetry in $B^0 \to J/\psi K^0_\rm S$ decays.
In
Phys.Lett.,
Vol. B721,
pages 24-31,
2013.
|
| Aaij/B/2013b |
Aaij, R and andere (inkl. Spaan, B. (LHCb Collaboration)).
Measurement of the $B^0$--$\bar B^0$ oscillation frequency $\Delta m_d$ with the decays $B^0 \to D^- \pi^+$ and $B^0 \to J\ \psi K^*0$.
In
Phys.Lett.,
Vol. B719,
pages 318-325,
2013.
|
| Balkesen/etal/2013c |
Cagri Balkesen and Jens Teubner and Gustavo Alonso and M. Tamer Özsu.
Main-Memory Hash Joins on Multi-Core CPUs: Tuning to the Underlying Hardware.
In
Proc.\ of the 29th IEEE Int'l Conference on Data Engineering (ICDE),
pages 362--373,
Brisbane, Australia,
2013.
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| Teubner/etal/2013a |
Jens Teubner and Louis Woods and Chongling Nie.
XLynx---An FPGA-Based XML Filter for Hybrid XQuery Processing.
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No. 4,
pages 23,
2013.
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| Woods/etal/2013a |
Louis Woods and Gustavo Alonso and Jens Teubner.
Parallel Computation of Skyline Queries.
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pages 1-8,
Seattle, WA, USA,
2013.
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| Roy/etal/2012a |
Pratanu Roy and Jens Teubner and Gustavo Alonso.
Efficient Frequent Item Counting in Multi-Core Hardware.
In
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pages 1451--1459,
Beijing, China,
2012.
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| Schleich/2011a |
Schleich, Sebastian.
First measurement of the inclusive $\phi$ meson production cross section in pp collisions at $\sqrt s = 7$ TeV and search for CP-violation in the $B_s\rightarrow\phi\phi$ decay at LHCb.
TU Dortmund,
2011.
|
| Woods/etal/2010a |
Louis Woods and Jens Teubner and Gustavo Alonso.
Complex Event Detection at Wire Speed with FPGAs.
In
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Vol. 3,
No. 1,
Singapore,
2010.
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| Mueller/etal/2009b |
René Müller and Jens Teubner and Gustavo Alonso.
Streams on Wires---A Query Compiler for FPGAs.
In
Proceedings of the VLDB Endowment,
Vol. 2,
No. 1,
pages 229--240,
Lyon, France,
2009.
|
| Nedos/2008a |
Nedos, Mirco.
Entwicklung, Implementierung and Test eines FPGA-Designs f\FCr die Level-1-Frontend-Elektronik des \C4usseren Spurkammersystems im LHCb-Detektor.
TU Dortmund,
2008.
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