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51 papers · 1 filter
Spectroscopic factors for bound s-wave states derived from neutron scattering lengths
P. Mohr, H. Herndl, H. Oberhummer
A simple and model-independent method is described to derive neutron single-particle spectroscopic factors of bound s-wave states in nuclei from neutron…
On the Calabi-Yau Phase of (0,2) Models
M. Nikbakht-Tehrani
We study the Calabi-Yau phase of a certain class of (0,2) models. These are conjectured to be equivalent to exact (0,2) superconformal field theories which have been constructed re…
The ^{144}Sm-αoptical potential at astrophysically relevant energies derived from ^{144}Sm(α,α)^{144}Sm elastic scattering
P. Mohr, T. Rauscher, H. Oberhummer +5
For the determination of the optical potential we measured the angular distribution of scattering at the energy with high ac…
Boundary Conditions and Quasilocal Energy in the Canonical Formulation of All 1+1 Models of Gravity
W. Kummer, S. R. Lau
Within a first-order framework, we comprehensively examine the role played by boundary conditions in the canonical formulation of a completely general two-dimensional gravity model…
Differential Forms and Wave Equations for General Relativity
Stephen R. Lau
Recently, Choquet-Bruhat and York and Abrahams, Anderson, Choquet-Bruhat, and York (AACY) have cast the 3+1 evolution equations of general relativity in gauge-covariant and causal…
General Treatment of All 2d Covariant Models
W. Kummer
General matterless models of gravity include dilaton gravity, arbitrary powers in curvature, but also dynamical torsion. They are a special class of "Poisson-sigma-models" whose so…