OpenAccess

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2024-07-16
14:48
OpenAccess [PUBDB-2024-05110] Journal Article
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Measurement of the branching fraction of the decay $B^- \to D^0 \rho(770)^-$ at Belle II
[Belle II Preprint 2024-011; KEK Preprint 2024-4; arXiv:2404.10874]
We measure the branching fraction of the decay $B^- \to D^0 \rho(770)^-$ using data collected with the Belle II detector. The data contain 387 million $B\overline{B}$ pairs produced in $e^+e^-$ collisions at the $\Upsilon(4S)$ resonance. [...]
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2024-07-16
14:44
OpenAccess [PUBDB-2024-05109] Journal Article
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Measurement of $CP$ asymmetries in $B^0 \rightarrow K^0_S K^0_S K^0_S$ decays at Belle II
[Belle II Preprint 2024-008; KEK Preprint 2023-56; arXiv:2403.02590]
We report a measurement of decay-time dependent charge-parity ($CP$) asymmetries in $B^0 \rightarrow K^0_S K^0_S K^0_S$ decays. We use $387 \times 10^6 B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle II detector at the SuperKEKB asymmetric-energy electron-positron collider. [...]
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2024-07-16
14:42
OpenAccess [PUBDB-2024-05108] Journal Article
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Search for the $e^+e^-\to\eta_{b}(1S)\omega$ and $e^+e^-\to\chi_{b0}(1P)\omega$ processes at $\sqrt{s}=10.745\,\mathrm{GeV}$
[Belle II Preprint 2023-018; KEK Preprint 2023-36; arXiv:2312.13043]
We search for the $e^+e^-\to\eta_b(1S)\omega$ and $e^+e^-\to\chi_{b0}(1P)\omega$ processes at a center-of-mass energy of 10.745 GeV, which is close to the peak of the $\Upsilon(10753)$ state. We use data collected by the Belle II experiment during a special run, corresponding to an integrated luminosity of $9.8\,\mathrm{fb}^{-1}$. [...]
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2024-07-16
14:39
OpenAccess [PUBDB-2024-05106] Preprint
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Search for the baryon number and lepton number violating decays $\tau^-\to \Lambda\pi^-$ and $\tau^-\to \bar{\Lambda}\pi^-$ at Belle II
[Belle II Preprint 2024-020; KEK Preprint 2024-17; arXiv:2407.05117]
We present a search for the baryon number $B$ and lepton number $L$ violating decays $\tau^- \rightarrow \Lambda \pi^-$ and $\tau^- \rightarrow \bar{\Lambda} \pi^-$ produced from the $e^+e^-\to \tau^+\tau^-$ process, using a 364 fb$^{-1}$ data sample collected by the Belle~II experiment at the SuperKEKB collider. No evidence of signal is found in either decay mode, which have $|\Delta(B-L)|$ equal to $2$ and $0$, respectively. [...]
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2024-07-11
12:08
OpenAccess [PUBDB-2024-05053] Journal Article
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Chirale Kontrolle von Molekülen in der Gasphase mittels Mikrowellenpulsen
Angewandte Chemie 135(27), e202219045 () [10.1002/ange.202219045]  GO
Microwave three-wave mixing has emerged as a novel approach for studying chiral molecules in the gas phase.This technique employs resonant microwave pulses and is a non-linear and coherent approach. It serves as a robust method to differentiate between the enantiomers of chiral molecules and to determine the enantiomeric excess, even in complex chiral mixtures. [...]
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2024-07-10
18:46
OpenAccess [PUBDB-2024-05043] Book/Dissertation / PhD Thesis
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Analytic and Algebraic Studies of Feynman Integrals
[DESY-THESIS-2024-010]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 170 pp. () [10.3204/PUBDB-2024-05043] = Dissertation, Universität Hamburg, 2024  GO
Feynman integrals are central to the calculation of scattering amplitudes both in particle and gravitationalwave physics. This thesis presents advancements in both the analytical and algebraicstructure of these integrals and shows how this can be used for efficient evaluation of these integrals.Paper I. [...]
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2024-07-10
13:08
OpenAccess [PUBDB-2024-05030] Preprint
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Ultrafast dynamics of fluorene initiated by highly intense laser fields
We present an investigation of the ultrafast dynamics of the polycyclic aromatic hydrocarbon fluorene initiated by an intense femtosecond near- infrared laser pulse (810 nm) and probed by a weak visible pulse (405 nm). Using a multichannel detection scheme (mass spectra, electron and ion velocity-map imaging), we provide a full disentanglement of the complex dynamics of the vibronically excited parent molecule, its excited ionic states, and fragments [...]
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2024-07-10
09:21
OpenAccess [PUBDB-2024-05025] Preprint
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Acoustic Funnel and Buncher for Nanoparticle Injection
[arXiv:1803.07472]
Acoustics-based techniques are investigated to focus and bunch nanoparticle beams. This allows to overcome the prominent problem of the longitudinal and transverse mismatch of particle stream and x-ray beam in single-particle/single molecule imaging at x-ray free-electron lasers (XFEL). [...]
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2024-07-08
19:05
OpenAccess [PUBDB-2024-05002] Journal Article
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Time-resolved crystallography of boric acid binding to the active site serine of the β-lactamase CTX-M-14 and subsequent 1,2-diol esterification
The emergence and spread of antibiotic resistance represent a growing threat to public health. Of particular concern is the appearance of β-lactamases, which are capable to hydrolyze and inactivate the most important class of antibiotics, the β-lactams. [...]
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2024-07-08
14:14
OpenAccess [PUBDB-2024-04999] Journal Article
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Polymeric liquids in mesoporous photonic structures: From precursor film spreading to imbibition dynamics at the nanoscale
Polymers are known to wet nanopores with high surface energy through an atomically thin precursor film followed by slower capillary filling. We present here light interference spectroscopy using a mesoporous membrane-based chip that allows us to observe the dynamics of these phenomena in situ down to the sub-nanometer scale at milli- to microsecond temporal resolution. [...]
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