CERN Accelerating science

CERN Published Articles

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2023-09-22
05:40
Lepton Flavour Universality tests in b → clν decays at LHCb / Mohammed, Rizwaan (Oxford U.) /LHCb Collaboration
The Standard Model predicts that the electroweak couplings to the three charged leptons are identical. However, in the last decade, experimental measurements have suggested that semileptonic processes involving taus could have a slightly enhanced decay rate compared to their muonic counterparts. [...]
arXiv:2307.08109.- 2023-09-18 - 6 p. - Published in : JINST 18 (2023) C09011 Fulltext: 2307.08109 - PDF; document - PDF;

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2023-09-20
08:41
Running the Dual-PQC GAN on noisy simulators and real quantum hardware / Chang, Su Yeon (CERN ; Ecole Polytechnique, Lausanne) ; Agnew, Edwin (Cambridge U.) ; Combarro, Elías F (Oviedo U.) ; Grossi, Michele (CERN) ; Herbert, Steven (Cambridge U.) ; Vallecorsa, Sofia (CERN)
In an earlier work, we introduced dual-Parameterized Quantum Circuit (PQC) Generative Adversarial Networks (GAN), an advanced prototype of a quantum GAN. We applied the model on a realistic High-Energy Physics (HEP) use case: the exact theoretical simulation of a calorimeter response with a reduced problem size. [...]
arXiv:2205.15003.- 2023 - 6 p. - Published in : J. Phys. : Conf. Ser.: 2438 (2023) , no. 1, pp. 012062
Fulltext: document - PDF; 2205.15003 - PDF;
In : 20th International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT 2021), Daejeon, Korea, 29 Nov - 3 Dec 2021, pp.012062

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2023-09-20
08:41
Ensemble Models for Calorimeter Simulations / Jaruskova, K (CERN ; Prague, Tech. U.) ; Vallecorsa, S (CERN)
Foreseen increasing demand for simulations of particle transport through detectors in High Energy Physics motivated the search for faster alternatives to Monte Carlo-based simulations. Deep learning approaches provide promising results in terms of speed up and accuracy, among which generative adversarial networks (GANs) appear to be particularly successful in reproducing realistic detector data. [...]
2023 - 5 p. - Published in : J. Phys. : Conf. Ser. 2438 (2023) 012080 Fulltext: PDF;
In : 20th International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT 2021), Daejeon, Korea, 29 Nov - 3 Dec 2021, pp.012080

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2023-09-20
08:41
CernVM-FS ephemeral publishers on Kubernetes / Valenzuela, Andrea (CERN) ; Blomer, Jakob (CERN)
The CernVM File System (CernVM-FS) is a global read-only POSIX file system that provides scalable and reliable software distribution to numerous scientific collaborations. It gives access to more than a billion binary files of experiment application software stacks and operating system containers to end user devices, grids, clouds, and supercomputers. [...]
2023 - 5 p. - Published in : J. Phys. : Conf. Ser. 2438 (2023) 012014 Fulltext: PDF;
In : 20th International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT 2021), Daejeon, Korea, 29 Nov - 3 Dec 2021, pp.012014

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2023-09-20
08:41
Extending the distributed computing infrastructure of the CMS experiment with HPC resources / CMS Collaboration
Particle accelerators are an important tool to study the fundamental properties of elementary particles. Currently the highest energy accelerator is the LHC at CERN, in Geneva, Switzerland. [...]
2023 - 7 p. - Published in : J. Phys. : Conf. Ser. 2438 (2023) 012039 Fulltext: aaea79f26e7b0ef455f52cb4f510d3d1 - PDF; document - PDF; External link: Fermilab Library Server
In : 20th International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT 2021), Daejeon, Korea, 29 Nov - 3 Dec 2021, pp.012039

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2023-09-20
08:41
The LHCb Mighty Tracker / Padeken, Klaas (Bonn U., HISKP) /LHCb Mighty Tracker Group Collaboration
During the long shutdown 4 of the LHC the instantaneous luminosity will be increased by a factor of $\approx 10$ to $1.5\cdot 10^{34} \text{cm}^{-2}\text{s}^{-1}$. The expected data recorded with the LHCb detector will increase from 50 $\text{fb}^{-1}$ to 300 $\text{fb}^{-1}$. [...]
2023 - 7 p. - Published in : PoS Pixel2022 (2023) 084 Fulltext: PDF;
In : International Workshop on Semiconductor Pixel Detectors for Tracking and Imaging (PIXEL 2022), Santa Fe, USA, 11 - 16 Dec 2022, pp.084

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2023-09-20
08:41
Design of a request/response buffering application for I/O intensive workloads / Grötschla, F (CERN ; Zurich, ETH) ; Lehmann Miotto, G (CERN) ; Sipos, R (CERN)
The performance of I/O intensive applications is largely determined by the organization of data and the associated insertion/extraction techniques. In this paper we present the design and implementation of an application that is targeted at managing data received (upto ~ 150 Gb/s payload throughput) into host DRAM, buffering data for several seconds, matched with the DRAM size, before being dropped. [...]
2023 - 6 p. - Published in : J. Phys. : Conf. Ser. 2438 (2023) 012025 Fulltext: PDF;
In : 20th International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT 2021), Daejeon, Korea, 29 Nov - 3 Dec 2021, pp.012025

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2023-09-20
08:41
Azimuthal correlations in high pT processes with the TMD parton branching method at NLO / van Kampen, Mees (Antwerp U.) ; Martinez, A Bermudez (DESY) ; Banos, L I Estevez (DESY) ; Hautmann, F (Antwerp U. ; CERN ; Oxford U.) ; Jung, H (DESY) ; Mendizabal, M (DESY) ; Figueroa, K Moral (Edinburgh U.) ; Prestel, S (Lund U.) ; Monfared, S Taheri (DESY) ; Wang, Q (DESY ; Peking U.) et al.
We discuss our recent results on azimuthal distributions in vector boson + jets and multi-jet production at the LHC, obtained from the matching of next-to-leading order (NLO) perturbative matrix elements with transverse momentum dependent (TMD) parton branching. We present a comparative analysis of boson-jet and jet-jet correlations in the back to-back region, and a study of the theoretical systematic uncertainties associated with the matching scale in the cases of TMD and collinear parton showers..
arXiv:2209.13945.- 2022 - 6 p. - Published in : PoS ICHEP2022 (2022) 830 Fulltext: document - PDF; 2209.13945 - PDF;
In : 41st International Conference on High Energy Physics (ICHEP 2022), Bologna, Italy, 6 - 13 Jul 2022, pp.830

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2023-09-20
08:41
Exploring data merging methods for a distributed processing system / Konopka, Piotr (CERN) ; von Haller, Barthélémy (CERN)
The ALICE experiment at the CERN LHC (Large Hadron Collider) is undertaking a major upgrade during the LHC Long Shutdown 2 in 2019-2021, which includes a new computing system called O$^{2}$ (Online-Offline). The raw data input from the ALICE detectors will increase a hundredfold, up to 3.5 TB/s. [...]
2023 - 7 p. - Published in : J. Phys. : Conf. Ser. 2438 (2023) 012038 Fulltext: PDF;
In : 20th International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT 2021), Daejeon, Korea, 29 Nov - 3 Dec 2021, pp.012038

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2023-09-20
08:41
The ALICE Pixel Readout Upgrade / Sarritzu, Valerio (INFN, Cagliari ; Cagliari U.) /ALICE Collaboration
The ALICE experiment at CERN is developing an upgrade of the three innermost layers of the Inner Tracking System (ITS3) to be installed during the Long Shutdown 3 of the LHC (2026–28). Based on a commercial 65 nm CMOS imaging technology for monolithic active pixel sensors, it consists of truly cylindrical wafer-scale bent stitched detectors that can be installed as close as 18 mm to the interaction point and will dramatically reduce the material budget in the region close to the interaction point to 0.05% X0 per layer. [...]
2023 - 13 p. - Published in : PoS Pixel2022 (2023) 027 Fulltext: PDF;
In : International Workshop on Semiconductor Pixel Detectors for Tracking and Imaging (PIXEL 2022), Santa Fe, USA, 11 - 16 Dec 2022, pp.027

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