33,736 research outputs found
Deuteron-deuteron scattering above four-nucleon breakup threshold
Deuteron-deuteron elastic scattering and transfer reactions in the energy
regime above four-nucleon breakup threshold are described by solving exact
four-particle equations for transition operators. Several realistic nuclear
interaction models are used, including the one with effective many-nucleon
forces generated by the explicit -isobar excitation; the Coulomb force
between protons is taken into account as well. Differential cross sections,
deuteron analyzing powers, outgoing nucleon polarization, and
deuteron-to-neutron polarization transfer coefficients are calculated at 10 MeV
deuteron energy. Overall good agreement with the experimental data is found.
The importance of breakup channels is demonstrated.Comment: 5 figure
It's not how you play the game, it's winning that matters: an experimental investigation of asymmetric contests
This paper reports an experimental test of asymmetric Tullock contests. Both the simultaneous-move and sequential-move frameworks are considered. The introduction of asymmetries in the contest function generates experimental behavior qualitatively consistent with the theoretical predictions. However, especially in the simultaneous-move framework, average bidding levels are in excess of the risk-neutral predictions. We conjecture that the reason behind this behavior lies in subjects attaching positive utility to victory in the contest.Laboratory experiments, contests, asymmetries
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