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67 papers · 1 filter
X-ray Imaging Using a Hybrid Photon Counting GaAs Pixel Detector
C. Schwarz, M. Campbell, R. Goeppert +11
The performance of hybrid GaAs pixel detectors as X-ray imaging sensors were investigated at room temperature. These hybrids consist of 300 mu-m thick GaAs pixel detectors, flip-ch…
On representations of star product algebras over cotangent spaces on Hermitian line bundles
Martin Bordemann, Nikolai Neumaier, Markus J. Pflaum +1
For every formal power series of closed two-forms on a manifold and every value of an ordering parameter we construct a concrete star produ…
A Measurement of the tau->electron Branching Ratio
The OPAL Collaboration, G. Abbiendi et al
The branching ratio for the decay tau->e nue nutau has been measured using Z0 decay data collected by the OPAL experiment at LEP. In total 33073 tau->e nue nutau candidates were id…
Decoherence in quantum cosmology at the onset of inflation
A. Barvinsky, A. Kamenshchik, C. Kiefer +1
We calculate the reduced density matrix for the inflaton field in a model of chaotic inflation by tracing out degrees of freedom corresponding to various bosonic fields. We find a…
A comparison of the eigenvalues of the Dirac and Laplace operator on the two-dimensional torus
Ilka Agricola, Bernd Ammann, Thomas Friedrich
We compare the eigenvalues of the Dirac and Laplace operator on a two-dimensional torus with respect to the trivial spin structure. In particular, we compute their variation up to…
Semiclassical time--dependent propagation in three dimensions: How accurate is it for a Coulomb potential?
Gerd van de Sand, Jan M. Rost
A unified semiclassical time propagator is used to calculate the semiclassical time-correlation function in three cartesian dimensions for a particle moving in an attractive Coulom…