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2024-09-13
15:34
OpenAccess [PUBDB-2024-05934] Journal Article
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Measurement of t-channel production of single top quarks and antiquarks in pp collisions at 13 TeV using the full ATLAS Run 2 data sample
[CERN-EP-2023-289; arXiv:2403.02126]
The production of single top quarks and top antiquarks via the t-channel exchange of a virtual W boson is measured in proton-proton collisions at a centre-of-mass energy of 13 TeV at the LHC using 140 fb$^{−1}$ of ATLAS data. The total cross-sections are determined to be $ \sigma (tq)={137}_{-8}^{+8} $ pb and $ \sigma \left(\overline{t}q\right)={84}_{-5}^{+6} $ pb for top-quark and top-antiquark production, respectively [...]
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2024-09-13
15:32
OpenAccess [PUBDB-2024-05933] Conference Presentation

Reiche Ernte - oder: ,Standard' ist nur schön im Singular
Open-Access-Tage 2024, DESYKöln, DESY, Germany, 10 Sep 2024 - 12 Sep 20242024-09-102024-09-12 [10.3204/PUBDB-2024-05933]  GO
Insbesondere kleine (Spezial)bibliotheken wie die des Deutschen Elektronen-Synchrotrons DESY sind auf effiziente Prozesse angewiesen, um ihre vielfältigen Aufgaben zu erfüllen. So dient die Publikationsdatenbank PUBDB gleichzeitig als institutionelles Repositorium, Quelle für die Darstellung im Web und Basis für verschiedene Berichtsformate. [...]
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2024-09-13
15:04
OpenAccess [PUBDB-2024-05932] Journal Article
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Azimuthal Angle Correlations of Muons Produced via Heavy-Flavor Decays in 5.02 TeV Pb+Pb and pp Collisions with the ATLAS Detector
[CERN-EP-2023-185; arXiv:2308.16652]
Angular correlations between heavy quarks provide a unique probe of the quark-gluon plasma created in ultrarelativistic heavy-ion collisions. Results are presented of a measurement of the azimuthal angle correlations between muons originating from semileptonic decays of heavy quarks produced in 5.02 TeV Pb+Pb and pp collisions at the LHC. [...]
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2024-09-13
14:06
OpenAccess [PUBDB-2024-05931] Preprint
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Frequency splitting in undulator radiation from solid-state crystalline undulator
[arXiv:2404.00083]
The set of frequencies and angular properties of radiation emitted from a solid-state crystalline undulator based on the channeling effect are considered. High-frequency and low-frequency branches of the undulator radiation and the angular distribution of the emitted radiation are analyzed. [...]
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2024-09-13
09:58
OpenAccess [PUBDB-2024-05925] Preprint
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Towards Safe Multi-Task Bayesian Optimization
[arXiv:2312.07281]
Bayesian optimization has emerged as a highly effective tool for the safe online optimization of systems, due to its high sample efficiency and noise robustness. To further enhance its efficiency, reduced physical models of the system can be incorporated into the optimization process, accelerating it. [...]
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2024-09-12
14:13
OpenAccess [PUBDB-2024-05921] Preprint
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Determination of $|V_{ub}|$ from simultaneous measurements of untagged $B^0\to\pi^- \ell^+ \nu_{\ell}$ and $B^+\to\rho^0 \ell^+\nu_{\ell}$ decays
[Belle II Preprint 2024-023; KEK Preprint 2024-21; arXiv:2407.17403]
We present a measurement of $|V_{ub}|$ from a simultaneous study of the charmless semileptonic decays $B^0\to\pi^- \ell^+ \nu_{\ell}$ and $B^+\to\rho^0 \ell^+\nu_{\ell}$, where $\ell = e, \mu$. This measurement uses a data sample of 387 million $B\overline{B}$ meson pairs recorded by the Belle~II detector at the SuperKEKB electron-positron collider between 2019 and 2022. [...]
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2024-09-12
14:09
OpenAccess [PUBDB-2024-05920] Preprint
; ; ; et al
Measurement of $CP$ asymmetries in $B^0 \to K^0_S \pi^0 \gamma$ decays at Belle II
[Belle II Preprint 2024-009; KEK Preprint 2024-1; arXiv:2407.09139]
We report measurements of time-dependent $CP$ asymmetries in $B^0 \to K^0_S \pi^0 \gamma$ decays based on a data sample of $(388\pm6)\times10^6$$B\bar{B}$ events collected at the $\Upsilon(4S)$ resonance with the Belle II detector. The Belle II experiment operates at the SuperKEKB asymmetric-energy $e^+e^-$ collider. [...]
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2024-09-12
14:06
OpenAccess [PUBDB-2024-05919] Preprint
; ; ; et al
Measurement of branching fractions, CP asymmetry, and isospin asymmetry for $\boldsymbol{B\rightarrow\rho\gamma}$ decays using Belle and Belle II data
[Belle II Preprint 2023-019; KEK Preprint 2023-37; UCHEP-24-04; arXiv:2407.08984]
We present measurements of $B^{+}\rightarrow\rho^{+}\gamma$ and $B^{0}\rightarrow\rho^{0}\gamma$ decays using a combined data sample of $772 \times 10^6$$B\overline{B}$ pairs collected by the Belle experiment and $387\times 10^6$$B\overline{B}$ pairs collected by the Belle II experiment in $e^{+}e^{-}$ collisions at the $\Upsilon (4S)$ resonance. After an optimized selection, a simultaneous fit to the Belle and Belle II data sets yields $114\pm 12$$B^{+}\rightarrow\rho^{+}\gamma$ and $99\pm 12$$B^{0}\rightarrow\rho^{0}\gamma$ decays. [...]
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2024-09-11
15:54
OpenAccess [PUBDB-2024-05902] Journal Article
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(Sub-)Picosecond Surface Correlations of Femtosecond Laser Excited Al-Coated Multilayers Observed by Grazing-Incidence X-ray Scattering
Nanomaterials 14(12), 1050 () [10.3390/nano14121050]  GO
Femtosecond high-intensity laser pulses at intensities surpassing 1014 W/cm2 can generate a diverse range of functional surface nanostructures. Achieving precise control over the production of these functional structures necessitates a thorough understanding of the surface morphology dynamics with nanometer-scale spatial resolution and picosecond-scale temporal resolution. [...]
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2024-09-11
15:29
OpenAccess [PUBDB-2024-05901] Journal Article
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Data reduction activities at European XFEL: early results
The European XFEL is a megahertz repetition-rate facility producing extremely bright and coherent pulses of a few tens of femtoseconds duration. The amount of data generated in the context of user experiments can exceed hundreds of gigabits per second, resulting in tens of petabytes stored every year. [...]
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