Alex Langnau

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There is currently public discussion as to whether the legal limit of blood alcohol concentration of drivers might be reduced from 0.8% to 0.5%. To acquire information concerning this problem, we measured temporal parameters of saccades and analysed the overall eye-movement behaviour with various blood ethanol concentrations. Eye movements were registered(More)
In this paper we provide evidence that financial option markets for equity indices give rise to non-trivial dependency structures between its constituents. Thus, if the individual constituent distributions of an equity index are inferred from the single-stock option markets and combined via a Gaussian copula, for example, one fails to explain the steepness(More)
Recent results from lattice QCD simulations provide a realistic picture, based upon first principles, of Υ physics. We combine these results with the experimentally measured mass of the Υ meson to obtain an accurate and reliable value for the b-quark’s pole mass. We use two different methods, each of which yields a mass consistent with Mb = 5.0(2) GeV. This(More)
The spectrum of the Υ system is investigated using the Nonrelativistic Lattice QCD approach to heavy quarks and ignoring light quark vacuum polarization. We find good agreement with experiment for the Υ, Υ, Υ and for the center of mass and fine structure of the χb-states. The lattice calculations predict bb̄ D-states with center of mass at (10.20 ± 0.07 ±(More)
An ultraviolet regularization and renormalization procedure of light-cone perturbation theory, which is suitable for a numerical application is discussed. The fourth order correction to the anomalous magnetic moment of the electron in the light-cone gauge is computed. Several regularizations of the associated light-cone gauge singularity are explored. Local(More)
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