Teilchenmassen
Teilchenmassen refers to the masses of elementary particles. In the Standard Model of particle physics, most elementary particles have mass, with the exception of the photon and the gluon. The masses of these particles are fundamental properties that are not predicted by the theory itself but are determined experimentally. These masses vary greatly, from the nearly massless neutrinos to the massive top quark.
The origin of elementary particle masses is explained by the Higgs mechanism. According to this mechanism,
Neutrinos were initially thought to be massless, but experiments have shown they have very small, non-zero masses.