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2025-07-03
11:24
Taming the N3LO corrections to semileptonic $b \to u$ decay / Fael, Matteo (CERN) ; Usovitsch, Johann (CERN)
We review the calculation of the QCD corrections of order $\alpha_s^3$ to the decay rate of $b \to u l \bar \nu_l$, originating from diagrams with closed fermion loops and neglecting the mass of the up quark. Our calculation takes advantage of integration-by-parts reduction of Feynman integrals with one propagator raised to a symbolic power in Kira. [...]
2024 - 11 p. - Published in : PoS LL2024 (2024) 005 Fulltext: PDF;
In : 17th Loops and Legs in Quantum Field Theory (LL 2024), Wittenberg, Germany, 14 - 19 Apr 2024, pp.005

Detaljerad journal
2025-07-02
06:32
Optimization of the Compact Linear Collider rings-to-main-linac at 380 GeV / Zhao, Yongke (CERN) ; Latina, Andrea (CERN)
The baseline configuration of the Compact Linear Collider’s rings-to-main-linac sections has been optimized for the 380 GeV center-of-mass energy stage, and some outstanding issues in previous designs have been resolved. In particular, the bunch compressors have been redesigned to reduce power consumption and cost. [...]
2025 - 11 p. - Published in : Phys. Rev. Accel. Beams 28 (2025) 021003

Detaljerad journal
2025-07-02
06:32
Enabling impedance measurements of energised superconducting circuits through differential probing / Christensen, M B B (Aalborg U. ; CERN) ; Bednarek, M J (CERN) ; Koch, P (Aalborg U.) ; Podzorny, T (CERN) ; Steckert, J (CERN) ; Østergaard, J (Aalborg U.)
Impedance measurements are essential for validating theelectrical integrity of superconducting magnets. However,traditional measurements are conducted on de-energised circuits,restricting the ability to perform continuous validation. [...]
2025 - 34 p. - Published in : JINST 20 (2025) P05042 Fulltext: PDF;

Detaljerad journal
2025-07-02
06:32
Advancements in resistive MPGD: From μ-RWELL technology to high performance Hybrid Layouts / Bencivenni, G (Frascati) ; De Lucia, E (Frascati) ; De Oliveira, R (CERN) ; De Robertis, G (INFN, Bari) ; Debernardis, F (INFN, Bari) ; Felici, G (Frascati) ; Gatta, M (Frascati) ; Giovannetti, M (Frascati) ; Licciulli, F (INFN, Bari) ; Morello, G (Frascati) et al.
Future high-energy and nuclear physics experiments require advanced particle gaseous detectors with exceptional tracking and timing performance, capable of operating in harsh environments. The μ-RWELL, a single-stage resistive Micro-Pattern-Gaseous-Detector (MPGD), developed by some of the authors in 2014, achieves gas gains of ∼2×104, ∼100μm spatial resolution, and 5–6ns time resolution. [...]
2025 - 5 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1080 (2025) 170623
In : 17th Vienna Conference on Instrumentation (VCI2025), Vienna, Austria, 17 - 21 Feb 2025, pp.170623

Detaljerad journal
2025-07-02
04:11
Fine-tuning machine-learned particle-flow reconstruction for new detector geometries in future colliders / Mokhtar, Farouk (UC, San Diego) ; Pata, Joosep (NICPB, Tallinn) ; Garcia, Dolores (CERN) ; Wulff, Eric (CERN) ; Zhang, Mengke (UC, San Diego) ; Kagan, Michael (SLAC) ; Duarte, Javier (UC, San Diego)
We demonstrate transfer learning capabilities in a machine-learned algorithm trained for particle-flow reconstruction in high energy particle colliders. This paper presents a cross-detector fine-tuning study, where we initially pretrain the model on a large full simulation dataset from one detector design, and subsequently fine-tune the model on a sample with a different collider and detector design. [...]
arXiv:2503.00131.- 2025-05-01 - 20 p. - Published in : Phys. Rev. D Fulltext: PDF;

Detaljerad journal
2025-07-02
04:08
Chaos indicators for nonlinear dynamics in circular particle accelerators / Montanari, C.E. (Manchester U. ; CERN) ; Appleby, R.B. (Manchester U.) ; Bazzani, A. (Bologna U. ; INFN, Bologna) ; Fornara, A. (Manchester U. ; CERN) ; Giovannozzi, M. (CERN) ; Redaelli, S. (CERN) ; Sterbini, G. (CERN) ; Turchetti, G. (Bologna U.)
The understanding of non-linear effects in circular storage rings and colliders based on superconducting magnets is a key issue for the luminosity the beam lifetime optimisation. A detailed analysis of the multidimensional phase space requires a large computing effort when many variants of the magnetic lattice, representing the realisation of magnetic errors or configurations for performance optimisation, have to be considered. [...]
arXiv:2504.12741.- 2025-06-27 - 23 p. - Published in : Eur. Phys. J. Plus 140 (2025) 603 Fulltext: 2504.12741 - PDF; document - PDF;

Detaljerad journal
2025-07-02
04:06
DataPix4: A C++ framework for Timepix4 configuration and read-out / Cavallini, Viola (U. Ferrara (main) ; INFN, Ferrara) ; Biesuz, Nicolò Vladi (INFN, Ferrara) ; Bolzonella, Riccardo (U. Ferrara (main) ; INFN, Ferrara) ; Calore, Enrico (INFN, Ferrara) ; Fiorini, Massimiliano (U. Ferrara (main) ; INFN, Ferrara) ; Gianoli, Alberto (INFN, Ferrara) ; Llopart Cudie, Xavier (CERN) ; Schifano, Sebastiano Fabio (U. Ferrara (main) ; INFN, Ferrara)
DataPix4 (Data Acquisition for Timepix4 Applications) is a new C++ framework for the management of Timepix4 ASIC, a multi-purpose hybrid pixel detector designed at CERN. Timepix4 consists of a matrix of 448×512 pixels that can be connected to several types of sensors, to obtain a pixelated detector suitable for different applications. [...]
arXiv:2503.01609.- 2025-05-09 - 12 p. - Published in : Comput. Phys. Commun. 314 (2025) 109658 Fulltext: PDF;

Detaljerad journal
2025-07-02
04:06
Energy efficiency trends in HPC: what high-energy and astrophysicists need to know / Suarez, Estela (ZEL, Julich ; Unlisted, FR ; U. Bonn (main)) ; Amaya, Jorge (ESOC, Darmstadt) ; Frank, Martin (KIT, Karlsruhe) ; Freyermuth, Oliver (Bonn U.) ; Girone, Maria (CERN) ; Kostrzewa, Bartosz (Bonn U., HISKP) ; Pfalzner, Susanne (ZEL, Julich)
The growing energy demands of HPC systems have made energy efficiency a critical concern for system developers and operators. However, HPC users are generally less aware of how these energy concerns influence the design, deployment, and operation of supercomputers even though they experience the consequences. [...]
arXiv:2503.17283.- 2025-02-19 - 25 p. - Published in : Front. Phys. 13 (2025) 1542474 Fulltext: 2503.17283 - PDF; document - PDF;

Detaljerad journal
2025-07-02
04:02
Theoretical determination of the ionization potentials of ScF, YF, LaF, and AcF / Kyuberis, Aleksandra A. (Groningen U.) ; Pasteka, Lukas F. (Groningen U. ; Comenius U.) ; Eliav, Ephraim (Tel Aviv U. (main)) ; Sunaga, Ayaki (Eotvos U.) ; Au, Mia (CERN ; Mainz U.) ; Wilkins, Shane G. (MIT) ; Borschevsky, Anastasia (Groningen U.)
We present a comprehensive theoretical study of the ionization potentials of the MF (M = Sc, Y, La, Ac) molecules using the state-of-the-art relativistic coupled cluster approach with single, double, and perturbative triple excitations (CCSD(T)). We have further corrected our results for higherorder excitations (up to full triples), the QED self-energy and vacuum-polarization contributions. [...]
arXiv:2502.17451.- 2025-04-23 - 8 p. - Published in : Phys. Rev. A 111 (2025) 042823 Fulltext: PDF;

Detaljerad journal
2025-07-01
06:19
New upper limits for β-delayed fission probabilities of Fr230,232 and Ac230,232,234 / Bara, S (Leuven U.) ; Algora, A (Valencia U., IFIC) ; Andel, B (Comenius U.) ; Andreyev, A N (York U., England) ; Antalic, S (Comenius U.) ; Bark, R A (iThemba LABS) ; Borge, M J G (Madrid, Inst. Estructura Materia) ; Camaiani, A (Leuven U. ; INFN, Florence ; U. Florence (main)) ; Cocolios, T E (Leuven U.) ; Cubiss, J G (Edinburgh U. ; York U., England) et al.
The process of β-delayed fission (βDF) of Fr230,232 and Ac230,232,234 was studied in an experiment performed at the ISOLDE facility at CERN. As no fission fragments were observed for any of the nuclei investigated, upper limits for their βDF probability (PβDF) were determined. [...]
2025 - 11 p. - Published in : Phys. Rev. C 111 (2025) 065803 Fulltext: PDF;

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