Showing papers by "University of Alcalá published in 1980"
TL;DR: A theoretical model is presented which includes the interactions between internal migration flows, employment and unemployment generation, and regional income distribution and the model is estimated by simultaneous equations techniques using data on recent Spanish history.
15 citations
6 citations
TL;DR: In this paper, the high energy, fixed-angle limit of the ghost-free Frampton dual model, which is a particular case of the symmetric-group model, is in good agreement with the predictions of the s-channel Regge-pole model of Schrempp and Schlegl.
Abstract: The inability of the Veneziano model to define a reasonable fixed-angle behaviour is a challenge to the application of the dual approach. However, the high-energy, fixed-angle limit of the ghost-free Frampton dual model, which is a particular case of the symmetric-group model, is in good agreement with the predictions of thes-channel Regge-pole model of Schrempp and Schrempp. The particular shape of the fixed-angle limit depends on the unitarization of the model. In a realistic model with unit pomeron intercept, the differential cross-section behaves as exp [−h(ϕ)pT], in agreement with recent results on pp elastic scattering, and the functionh(ϕ) is fitted with experimental data, at angles between 50° and 90°, with an error less than 10%.
2 citations
TL;DR: In this paper, the role of sister trajectories in the fixed-angle limit of reggeon amplitudes is analyzed, and it is conjectured that the fixedangle limit is dominated by the less sloped sister trajectory exchanged in the Regge region.
Abstract: The role of sister trajectories in the fixedangle limit of reggeon amplitudes is analyzed. The conventional α-sector of the two-reggeon-two-particle scattering amplitude has been proved to be negligeable, in the non-Regge asymptotic limit, as compared to the unconventional β-sector, which behaves as exp{−β(s)f(θ)}. It is conjectured that the fixed-angle limit of a general reggeon amplitude is dominated by the less sloped sister trajectory exchanged in the Regge region.
2 citations
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