Journal Article

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2019-03-20
08:43
Embargoed OpenAccess [PUBDB-2019-01624] Journal Article

Probing photodissociation dynamics using ring polymer molecular dynamics
The performance of the ring polymer molecular dynamics (RPMD) approach to simulate typical photodissociation processes is assessed. The correct description of photodissociation requires the calculation of correlation functions or expectation values associated with non-equilibrium initial conditions, which was shown to be possible with RPMD very recently [J. [...]
Published on 2019-03-18. Available in OpenAccess from 2020-03-18.: Download fulltextPDF Download fulltextPDF (PDFA);
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2019-03-19
15:00
[PUBDB-2019-01623] Journal Article
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Exploring the failure behavior of rubber vulcanizates subjected to constraint tensile strain via X-ray experiments
Tire technology international November, 100 - 102 () special issue: "Annual Showcase 2018"  GO
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2019-03-19
11:12
OpenAccess [PUBDB-2019-01605] Report/Journal Article

Improved constraints on the mixing and mass of $Z'$ bosons from resonant diboson searches at the LHC at $\sqrt{s}=13$ TeV and predictions for Run II
[DESY-18-170; arXiv:1809.08933]
New neutral vector bosons Z′ decaying to charged gauge boson pairs W$^+$W$^-$ are predicted in many scenarios of new physics, including models with an extended gauge sector such as E6, left-right symmetric ZLRS′ and the sequential standard model ZSSM′. For these benchmark models we calculate and present theoretical expectations for different values of the Z′ mass M2 and mixing parameter ξ. [...]
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2019-03-19
10:24
OpenAccess [PUBDB-2019-01603] Journal Article

Time-resolved x-ray/optical pump-probe simulations on $\mathrm{N_2}$ molecules
Structural dynamics 6(2), 024101 () [10.1063/1.5053995]  GO
The dynamics of $N_2^{2+}$ dications after x-ray-induced Auger decay and their probing with a delayed infrared probe pulse are theoretically investigated based on a quantum-mechanical model including all relevant electronic states for which wave-packet calculations on ab-initio potential energy curves are performed. Our results demonstrate that the $N_2^{2+}$ yield modulated by the delay of the probe pulse contains dynamical information on the wave-packet evolution in the quasi-bound final electronic states [...]
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2019-03-18
11:32
OpenAccess [PUBDB-2019-01570] Report/Journal Article

Scalar 1-loop Feynman integrals as meromorphic functions in space-time dimension d
[DESY 17-079, HCMUS-19-01, KW 18-004, arXiv:1812.10975]
The long-standing problem of representing the general massive one-loop Feynman integral as a meromorphic function of the space-time dimension d has been solved for the basis of scalar one- to four-point functions with indices one. In 2003 the solution of difference equations in the space-time dimension allowed to determine the necessary classes of special functions: self-energies need ordinary logarithms and Gauss hypergeometric functions $_{2}F_1$, vertices need additionally Kampé de Fériet-Appell functions $F_1$, and box integrals also Lauricella-Saran functions $F_S$ [...]
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2019-03-15
11:37
[PUBDB-2019-01557] Journal Article
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Virtual Archaeology of Altered Paintings: Multiscale Chemical Imaging Tools
Elements 12(1), 39 - 44 () [10.2113/gselements.12.1.39]  GO
Understanding how painted works of art were constructed, layer-by-layer, requires a range of macroscopic and microscopic X-ray and infrared-based analytical methods. Deconstructing complex assem-blies of paints horizontally across a picture and vertically through it provides insight into the detailed production process of the art work and on the painting techniques and styles of its maker. [...]
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2019-03-14
13:47
arXiv [PUBDB-2019-01539] Report/Journal Article

$\Lambda_b^0$-baryon production in pp collisions in the general-mass variable-flavour-number scheme and comparison with CMS and LHCb data
[DESY-18-036; arXiv:1803.11103; MITP-18-020]
We calculate the next-to-leading-order cross section for the inclusive production of $\Lambda_b$ baryons in pp collisions in the general-mass variable-flavor-number scheme. We use realistic evolved non-perturbative fragmentation functions obtained from fits to B-meson production in $e^+ e^-$ annihilation and compare our results for transverse-momentum and rapidity distributions with recent experimental data from the CMS and the LHCb collaborations at the CERN LHC. [...]
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2019-03-14
11:38
OpenAccess [PUBDB-2019-01537] Report/Journal Article
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The $O(\alpha^2)$ Initial State QED Corrections to $e^+e^-$ Annihilation to a Neutral Vector Boson Revisited
[arXiv:1901.08018; DESY-18-226; DO-TH-18-30]
We calculate the non-singlet, the pure singlet contribution, and their interference term, at $O(\alpha^2)$ due to electron-pair initial state radiation to $e^+ e^-$ annihilation into a neutral vector boson in a direct analytic computation without any approximation. The correction is represented in terms of iterated incomplete elliptic integrals. [...]
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2019-03-14
11:25
OpenAccess [PUBDB-2019-01536] Journal Article
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Measurement of atmospheric tau neutrino appearance with IceCube DeepCore
We present a measurement of atmospheric tau neutrino appearance from oscillations with three years of data from the DeepCore subarray of the IceCube Neutrino Observatory. This analysis uses atmospheric neutrinos from the full sky with reconstructed energies between 5.6 and 56 GeV to search for a statistical excess of cascadelike neutrino events which are the signature of $ν_τ$ interactions [...]
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2019-03-14
11:06
OpenAccess [PUBDB-2019-01535] Journal Article
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Relativistic Jet Simulations of the Weibel Instability in the Slab Model to Cylindrical Jets with Helical Magnetic Fields
Galaxies 7(1), 29 () [10.3390/galaxies7010029]  GO
The particle-in-cell (PIC) method was developed to investigate microscopic phenomena, and with the advances in computing power, newly developed codes have been used for several fields, such as astrophysical, magnetospheric, and solar plasmas. PIC applications have grown extensively, with large computing powers available on supercomputers such as Pleiades and Blue Waters in the US. [...]
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