Antonio Zecca

Non-standard aspects of Minkowski causal logic

The Minkowski causal logic, which is already known to be a complete orthomodular lattice, is found to be also an atomistic and irreducible logic, but to have no other essential properties to be represented in terms of all the subspace of some Hilbert space. Alternative representation of the logic in terms of subspaces of a real vector space or of the states in terms of probability measures are suggested.

Fine structure of equal mass q−q systems from a relativistic potential

Abstract The P triplets of equal mass q − q systems are calculated from a two parameter potential by taking into account the contribution of the spin-orbit and tensor-like terms neglected in previous calculations. Of the two sets of parameters and quark masses which give rise to S states both in good agreement with the experimental data, one gives better results in the case of P triplets.