Recent attempts to consider isolated particles and real constitutive wave elements as localized, extended spacetime structures (i.e., moving within time‐like hypertubes or branes are developed within a causal extension of the Feynman‐Gell‐Mann electron model. These extended structures contain real internal motions, (i.e., internal hidden parameters) locally correlated with the “hidden parameters” describing the local collective motions of the corresponding pilot‐waves. Recent experimental evidence is briefly discussed.
The existence of an internal frequency associated to any elementary particle conjectured by de Broglie is compared with a classical description of the electron, where this internal structure corresponds to the motion of the centre of charge around the centre of mass of the particle. This internal motion has a frequency twice de Broglie's frequency, which corresponds to the frequency found by Dirac when analysing the electron structure. To get evidence of this internal electron clock a kind of experiment as the one performed by Gouanére et al. \cite{Gouanere} will show a discrete set of momenta at which a resonant scattering effect, appears. The resonant momenta of the electron beam are given by
pk=161.748/k MeV
/c,
k=1,2,3,..., where only, the corresponding to
k=2, was within the range of Gouanére et al. experiment. The extension of the experiment to other values of
pk, would show the existence of this phenomenon.