We present an analysis of the ms-corrections to Cabibbo-suppressed Ï„ lepton decays employing contour improved resummation within an effective scheme which is an essential new feature as compared toâ€¦ (More)

We analyze Ï„ lepton decay observables, namely moments of the hadronic spectral density in the finite energy interval (0, MÏ„ ), within finite order perturbation theory including Î± s corrections. Theâ€¦ (More)

Two methods are compared that are used in path integral simulations. Both methods aim to achieve faster convergence to the quantum limit than the so-called primitive algorithm (PA). One method,â€¦ (More)

The spectral density of quantum mechanical Frenkel Kontorova chains moving in disordered, external potentials is investigated by means of path-integral molecular dynamics. If the second moment of theâ€¦ (More)

The commensurate Frenkel Kontorova (FK) model is studied using path-integral molecular dynamics (PIMD). We focus on the highly discrete case, in which the embedding potential has a much greaterâ€¦ (More)