OpenAccess

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2021-09-21
21:49
OpenAccess [PUBDB-2021-03802] Journal Article
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Photoelectron circular dichroism of O 1s-photoelectrons of uniaxially oriented trifluoromethyloxirane: energy dependence and sensitivity to molecular configuration
[arXiv:2106.08071]
The photoelectron circular dichroism (PECD) of the O 1s-photoelectrons of trifluoromethyloxirane (TFMOx) is studied experimentally and theoretically for different photoelectron kinetic energies. The experiments were performed employing circularly polarized synchrotron radiation and coincident electron and fragment ion detection using cold target recoil ion momentum spectroscopy. [...]
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2021-09-21
11:12
OpenAccess [PUBDB-2021-03792] Preprint
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A Detailed Study of Strange Particle Production in $e^+ e^-$ Annihilation at High-energy
[DESY-84-093]
Results onK0 and Λ production ine+e− annihilation at c.m. energies of 14, 22 and 34 GeV are presented. [...]
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2021-09-20
11:35
OpenAccess [PUBDB-2021-03783] Journal Article

Geometrical approach to causality in multiloop amplitudes
[DESY-21-017; arXiv:2102.05062]
An impressive effort is being pursued in order to develop new strategies that allow an efficient computation of multi-loop multi-leg Feynman integrals and scattering amplitudes, with a particular emphasis on removing spurious singularities and numerical instabilities. In this article, we describe an innovative geometric approach based on graph theory to unveil the causal structure of any multi-loop multi-leg amplitude in quantum field theory. [...]
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2021-09-18
19:25
OpenAccess [PUBDB-2021-03780] Journal Article
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Zwitterionic Character and Lipid Composition Determine the Behaviour of Glycosylphosphatidylinositol Fragments in Monolayers
ChemPhysChem 22(8), 757 - 763 () [10.1002/cphc.202100002]  GO
Glycosylphosphatidylinositols (GPIs) are complex glycolipids found in free form or anchoring proteins to the outer leaflet of the cell membrane in eukaryotes. GPIs have been associated with the formation of lipid rafts and protein sorting on membranes [...]
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2021-09-17
16:11
OpenAccess [PUBDB-2021-03774] Journal Article
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Location and arrangement of campaniform sensilla in Drosophila melanogaster
Sensory systems provide input to motor networks on the state of the body and environment. One such sensory system in insects is the campaniform sensilla (CS), which detect deformations of the exoskeleton arising from resisted movements or external perturbations. [...]
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2021-09-17
10:23
OpenAccess [PUBDB-2021-03770] Journal Article
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Simulating permeability reduction by clay mineral nanopores in a tight sandstone by combining computer X-ray microtomography and focussed ion beam scanning electron microscopy imaging
Solid earth 12(1), 1 - 14 () [10.5194/se-12-1-2021]  GO
Computer X-ray microtomography (µXCT) represents a powerful tool for investigating the physical properties of porous rocks. While calculated porosities determined by this method typically match experimental measurements, computed permeabilities are often overestimated by more than 1 order of magnitude. [...]
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2021-09-17
10:17
OpenAccess [PUBDB-2021-03769] Journal Article
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A new species group of Strumigenys (Hymenoptera, Formicidae) from Ecuador, with a description of its mandible morphology
ZooKeys 1036, 1 - 19 () [10.3897/zookeys.1036.62034]  GO
Strumigenys is one of the most diverse ant genera in the world and arguably the most morphologically diverse, exhibiting an exceptional range of mandible shape and function. A new species, Strumigenys ayersthey sp [...]
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2021-09-16
17:49
OpenAccess [PUBDB-2021-03765] Book/Dissertation / PhD Thesis
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A Glance into the Future of Particle Physics with Effective Field Theories
[DESY-THESIS-2021-016]
Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 193 pp. () [10.3204/PUBDB-2021-03765] = Dissertation, Humboldt-Universität zu Berlin, 2021  GO
The results obtained at the LHC agree well with the predictions of the Standard Model of particle physics (SM). However, the need for Beyond the Standard Model (BSM) physics remains. [...]
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2021-09-16
11:23
OpenAccess [PUBDB-2021-03761] Book
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Das verborgene Universum: die Multi-Messenger-Astronomie eröffnet den Blick auf unsichtbare Welten
Femto 21(01), () [10.3204/PUBDB-2021-03761]  GO
Abseits der leuchtenden Sterne liegt ein Universum, das unseren Augen gewöhnlich verborgen bleibt: Schwarze Löcher bringen mit Gravitationswellen den Kosmos zum Schwingen, subatomare Teilchen wie Neutrinos rasen mit höllischen Energien durchs All. Zum ersten Mal in der Geschichte der Menschheit lassen sich diese fundamental unterschiedlichen Boten aus dem Weltall heute beobachten und astro- nomisch auswerten. [...]
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2021-09-16
10:36
OpenAccess [PUBDB-2021-03759] Journal Article
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The N$^3$LO scheme-invariant QCD evolution of the non-singlet structure functions F$_{2}^{NS}$($x$,Q$^2$) and g$_1^{NS}$(x,Q$^2$)
[DESY-21-096; DO-TH 21/21; SAGEX-21-13-E; arXiv:2107.01293]
We present the scheme-invariant unpolarized and polarized flavor non–singlet evolution equation to N3LO for the structure functions F$_2$(x,Q$^2$) and g$_1$(x,Q$^2$) including the charm- and bottom quark effects in the asymptotic representation. The corresponding evolution is based on the experimental measurement of the non–singlet structure functions at a starting scale Q$_{0}^2$. [...]
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