arXiv subjects
Publications and source records attributed to V. Delgado.
A self-adjoint operator with dimensions of time is explicitly constructed, and it is shown that its complete and orthonormal set of eigenstates can be used to define consistently a probability distribution of the time of arrival at a spatial point.
An alternative for the Higgs mechanism is proposed. It predicts the appearance in the broken phase of a scalar background field which may be interpreted as describing an almost uniform (i.e., homogeneous and isotropic) superfluid condensate of decoupled Higgs bosons. Quantum fields acquire mass as a consequence of nonperturbative interactions with those particles condensed in the zero-momentum state (which constitutes the physical vacuum of the theory) giving rise in turn to the appearance of density fluctuations. This mechanism has therefore remarkable cosmological implications.
A dynamical mechanism of symmetry breaking in which gauge and matter fields play an active role is proposed. It basically represents a covariant generalization of the mechanism responsible for superconductivity, and provides a {\em natural} mechanism of generation of mass which is not in conflict with the present value of the cosmological constant. When applied to SU(2)$\times$U(1) leads to exactly the same physics (Lagrangian density) as the Standard Model but modifying {\em only} the Higgs sector. It also predicts the appearance over all space of a classical scalar field as well as the existence of density fluctuations. According to it, space would be filled with a macroscopically large number of Higgs bosons which now appear as light, stable scalar particles {\em decoupled} from ordinary matter and radiation. Therefore they would play the same role as the Cooper pairs in superconductivity and would be a natural candidate for dark matter.