20170116 12:46 
[FZJ201700451]
Preprint
Epelbaum, E. ; Gegelia, J. ; Meißner, U.G. ; et al
Renormalization of the threeboson system with shortrange interactions revisited
We consider renormalization of the threebody scattering problem in lowenergy effective field theory of selfinteracting scalar particles by applying timeordered perturbation theory to the manifestly Lorentzinvariant formulation. The obtained leadingorder equation is perturbatively renormalizable and nonperturbatively finite and does not require a threebody counter term in contrast to its nonrelativistic approximation..
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20161129 12:56 
[FZJ201606938]
Preprint
Chatterji, T. ; Meven, M. ; Brown, P. J.
Temperature evolution of magnetic structure of HoFeO$_3$ by single crystal neutron diffraction
We have investigated the temperature evolution of the magnetic structures of HoFeO$_3$ by single crystal neutron diffraction. The three different magnetic structures found as a function of temperature for \hfo\ are described by the magnetic groups Pb$2_1$, Pbn$2_1$ and Pbn$2_1$ and are stable in the temperature ranges $\approx$ 60055~K, 5537~K and 35$>T>2$~K respectively. [...]
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20161123 09:29 
[FZJ201606591]
Preprint
Thiel, A. ; Eberhardt, H. ; Lang, M. ; et al
Doublepolarization observable G in neutralpion photoproduction off the proton
This paper reports on a measurement of the doublepolarization observable G in $\pi^0$ photoproduction off the proton using the CBELSA/TAPS experiment at the ELSA accelerator in Bonn. The observable G is determined from reactions of linearlypolarized photons with longitudinallypolarized protons. [...]
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20161123 09:28 
[FZJ201606590]
Preprint
Gardner, S. ; Howdle, D. ; Sikora, M. H. ; et al
Photon asymmetry measurements of $\overrightarrow{\gamma} \mathrm{p} \rightarrow \pi^{0} \mathrm{p}$ for E$_{\gamma}$=320$$650 MeV
High statistics measurements of the photon asymmetry $\mathrm{\Sigma}$ for the $\overrightarrow{\gamma}$p$\rightarrow\pi^{0}$p reaction have been made in the center of mass energy range W=12141450 MeV. The data were measured with the MAMI A2 real photon beam and Crystal Ball/TAPS detector systems in Mainz, Germany. [...]
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20161123 09:27 
[FZJ201606589]
Preprint
Adlarson, P. ; Afzal, F. ; AguarBartolomé, P. ; et al
Measurement of the omega > pi^0 e^+e^ and eta > e^+e^g Dalitz decays with the A2 setup at MAMI
The Dalitz decays eta > e^+e^g and omega > pi^0 e^+e^ have been measured in the g p > eta p and g p > omega p reactions, respectively, with the A2 taggedphoton facility at the Mainz Microtron, MAMI. The value obtained for the slope parameter of the electromagnetic transition form factor of eta, Lambda^{2}_eta=(1.97+/0.13_tot) GeV^{2}, is in good agreement with previous measurements of the eta > e^+e^g and eta > mu^+mu^g decays. [...]
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20161020 07:52 
[FZJ201605483]
Preprint/Report
Schumann, D.
Assessment of the acceptance of energy systems transformation
[STE Preprint 20/2016]
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20161018 18:09 
[FZJ201605452]
Preprint
Bouchard, K. E. ; Aimone, J. B. ; Chun, M. ; et al
HighPerformance Computing in Neuroscience for DataDriven Discovery, Integration, and Dissemination.
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20160122 14:24 
[FZJ201600929]
Preprint/Report
Endres, M. G. ; Shindler, A. ; Tiburzi, B. C. ; et al
Massive photons: an infrared regularization scheme for lattice QCD+QED
[MITCTP/4691, JLABTHY152112, NT@WM1512]
The commonly adopted approach for including electromagnetic interactions in lattice QCD simulations relies on using finite volume as the infrared regularization for QED. The longrange nature of the electromagnetic interaction, however, implies that physical quantities are susceptible to powerlaw finite volume corrections, which must be removed by performing costly simulations at multiple lattice volumes, followed by an extrapolation to the infinite volume limit. [...]
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20160122 12:06 
[FZJ201600916]
Preprint
Luu, T. ; Lähde, T.
Quantum Monte Carlo Calculations for Carbon Nanotubes
We show how lattice Quantum Monte Carlo can be applied to the electronic properties of carbon nanotubes in the presence of strong electronelectron correlations. We employ the pathintegral formalism and use methods developed within the lattice QCD community for our numerical work. [...]
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20160122 12:04 
[FZJ201600915]
Preprint
Körber, C. ; Luu, T.
Applying Twisted Boundary Conditions for Fewbody Nuclear Systems
We describe and implement twisted boundary conditions for the deuteron and triton systems within finitevolumes using the nuclear lattice EFT formalism. We investigate the finitevolume dependence of these systems with different twists angles. [...]
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