96 research outputs found
Bildkunde Südosteuropas. Ein Einblick
1. Mailand, Mussolini und zwei Maler: Die Biografien Gino Boccasiles und Giulio Bertolettis
von Isabelle Arend
2. AEG, Siedlerstolz und Schwarzmarkt -
von Kristin Bub
3. Weshalb die Technik ihre Lakaien fressen darf
von Astrid Deilmann
4. Ein „Triumph der Nackten Tatsachen“:
Der Eiffelturm auf der Weltausstellung 1900
von Anna Diercks ´
5. „Die Saar bleibt deutsch!“
von Silke Eilers
6. Der Film als historische Quelle.
von Johannes Etmanski
7. Das Skelett auf dem Bomber
von Andreas Fleischer
8. Geschichte als Bild und Geschichtsbild:
von Sabine Merten
9. Zum Porträt eines Nicht-Porträtierten
von Thomas Pöpper
10. Die bildliche Darstellung des Moskauer Großfürsten auf der Carta marina und in der Historia de gentibus septentrionalibus des Olaus Magnus
von Maike Sac
Heavy pseudoscalar mesons in a Schwinger-Dyson--Bethe-Salpeter approach
The mass spectrum of heavy pseudoscalar mesons, described as quark-antiquark
bound systems, is considered within the Bethe-Salpeter formalism with
momentum-dependent masses of the constituents. This dependence is found by
solving the Schwinger-Dyson equation for quark propagators in rainbow-ladder
approximation. Such an approximation is known to provide both a fast
convergence of numerical methods and accurate results for lightest mesons.
However, as the meson mass increases, the method becomes less stable and
special attention must be devoted to details of numerical means of solving the
corresponding equations. We focus on the pseudoscalar sector and show that our
numerical scheme describes fairly accurately the , , , and
ground states. Excited states are considered as well. Our calculations
are directly related to the future physics programme at FAIR.Comment: 9 pages, 3 figures; Based on materials of the contribution
"Relativistic Description of Two- and Three-Body Systems in Nuclear Physics",
ECT*, October 19-23, 200
Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES
We present measurements of exclusive ensuremathπ+,0 and η production in pp reactions at 1.25GeV and 2.2GeV beam kinetic energy in hadron and dielectron channels. In the case of π+ and π0 , high-statistics invariant-mass and angular distributions are obtained within the HADES acceptance as well as acceptance-corrected distributions, which are compared to a resonance model. The sensitivity of the data to the yield and production angular distribution of Δ (1232) and higher-lying baryon resonances is shown, and an improved parameterization is proposed. The extracted cross-sections are of special interest in the case of pp → pp η , since controversial data exist at 2.0GeV; we find \ensuremathσ=0.142±0.022 mb. Using the dielectron channels, the π0 and η Dalitz decay signals are reconstructed with yields fully consistent with the hadronic channels. The electron invariant masses and acceptance-corrected helicity angle distributions are found in good agreement with model predictions
Author correction : roadmap for naming uncultivated archaea and bacteria
Correction to: Nature Microbiology https://doi.org/10.1038/s41564-020-0733-x , published online 8 June 2020. In the version of this Consensus Statement originally published, Pablo Yarza was mistakenly not included in the author list. Also, in Supplementary Table 1, Alexander Jaffe was missing from the list of endorsees. These errors have now been corrected and the updated Supplementary Table 1 is available online
Diversity and Efficiency of Rhizobia Communities from Iron Mining Areas Using Cowpea as a Trap Plant
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