http://popups.lib.uliege.be/1373-5411/index.php?id=2983 For Donald C. Chang, the rest mass of a particle is related to a transversal distribution of the amplitude of its wave function. We have computed the transversal distributions of the density of presence of a particle from the amplitudes of its wave function, we have drawn their surface graphs. As a consequence of the wave nature of particles, transversal distibutions show a serie of maxima and minima which depend of a Bessel function Jn of order n. At the zero radius the density is a maximum for n=0 and it is a null minimum for n>0 which defines a hollow mass. For John E. Carroll, the rest mass of a particle should correspond to variations in a hidden transversal time of a 3+3 space-time. We have computed these variations and we have found that there is a photon correlation in the hidden time, and that the rest mass might correspond to oscillations for superluminal particles, but direct or inverse exponential variations for subluminal particles. Full text issues Volume 17 Introduction fr Wed, 04 Sep 2024 08:52:09 +0200 Wed, 04 Sep 2024 08:52:32 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=2983 0