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We obtain reliable ?? scattering amplitudes consistent with experimental data, both at low and high energies, and fulfilling appropriate analyticity properties. We do this by first fitting experimental low energy [s^(1/2) ? (1.42 GeV] phase shif[...]texto impreso
We improve, in the energy region between the K?K threshold and ~ 1.4 GeV, the energy-dependent phase shift analysis of ? ? scattering presented in a previous paper. For the S0 wave, we have included more data above the K?K threshold and we hav[...]texto impreso
We complete and improve the fits to experimental ? ? scattering amplitudes, both at low and high energies, that we performed in the previous papers of this series. We then verify that the corresponding amplitudes satisfy analyticity requirements[...]texto impreso
Peláez Sagredo, José Ramón ; Garcia Martin, R. ; Kami?ski, Robert ; Ynduráin, F. J. | Amer Inst Physics | 2008We review our recent analysis of ?? scattering data in terms of Roy equations and Forward Dispersion Relations, and present some preliminary results in terms of a new set of oncesubtracted coupled equations for partial waves. The first analysis[...]texto impreso
We calculate the combination 2a?_(0)-5a?(^2) (the Olsson sum rule) and the scattering lengths and effective ranges a?,a?^(2) and b?,b?^(I) dispersively (with the Froissart-Gribov representation) using, at low energy, the phase shifts for ? ? sca[...]texto impreso
We perform a detailed Regge analysis of NN, ?N, KN, ? ?, and ?K scattering. From it, we find expressions that represent the pp scattering amplitudes with an accuracy of a few percent for exchange of isospin zero and ~15% for exchange of isospin [...]texto impreso
Crespo del Arco, Patricia ; González, J. M. ; Hernando Grande, Antonio ; Ynduráin, F. J. | American Physical Society | 2004-01It has been found that in highly anisometric ribbon-shaped Fe particles with nanoscale dimensions that the magnetization decreases with temperature markedly faster than in bulk bcc Fe. This anomalous dependence, which becomes more remarkable as [...]
