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154 papers · 1 filter
Activity autocorrelation in financial markets. A comparative study between several models
Luigi Palatella, Josep Perello, Miquel Montero +1
We study the activity, i.e., the number of transactions per unit time, of financial markets. Using the diffusion entropy technique we show that the autocorrelation of the activity…
Depinning transition of dislocation assemblies: pileup and low-angle grain boundary
Paolo Moretti, M. -Carmen Miguel, Michael Zaiser +1
We investigate the depinning transition occurring in dislocation assemblies. In particular, we consider the cases of regularly spaced pileups and low angle grain boundaries interac…
The role of dynamical polarization of the ligand to metal charge transfer excitations in {\em ab initio} determination of effective exchange parameters
Alain Gellé, Marketa L. Munzarová, Marie-Bernadette Lepetit +1
The role of the bridging ligand on the effective Heisenberg coupling parameters is analyzed in detail. This analysis strongly suggests that the ligand-to-metal charge transfer exci…
Non-Mesonic Weak Decay of Lambda-hypernuclei: a new determination of the Gn/Gp ratio
G. Garbarino, A. Parreno, A. Ramos
Theoretical descriptions of the non-mesonic weak decay of Lambda-hypernuclei are unable to reproduce the experimental values of the ratio Gn/Gp=G(Lambda n -> nn)/G(Lambda p -> np).…
Surface location of sodium atoms attached to He-3 nanodroplets
F. Stienkemeier, O. Bunermann, R. Mayol +3
We have experimentally studied the electronic excitation of Na atoms attached to He droplets by means of laser-induced fluorescence as well as beam depletion…
Dynamical Generation of Hyperon Resonances
A. Ramos, E. Oset, C. Bennhold +2
In this talk we report on how, using a chiral unitary approach for the meson--baryon interactions, two octets of baryon states and a singlet are generated dynamically,…