Assertion: electron's mass | /r/HasProperty | small
Facets:
value: in magnitude
type: OTHER
value: compared to nucleons
type: OTHER
Source sentences:
text: When Rosenfeld named them, the only known leptons were electrons and muons, whose masses are indeed small compared to nucleons—the mass of an electron (0.511 MeV/c2) and the mass of a muon (with a value of 105.7 MeV/c2) are fractions of the mass of the "heavy" proton (938.3 MeV/c2).
text: Although only differences of squares of the three mass values are known as of 2016, experiments have shown that these masses are tiny in magnitude.
text: For the case of neutrinos this theory has gained popularity as it can be used, in combination with the seesaw mechanism, to explain why neutrino masses are so small compared to those of the other elementary particles, such as electrons or quarks.
text: The mass of electrons is small when compared to that of nuclei and negatively charged.
text: The reason we usually work with neutrino states that give flavour diagonal W couplings and call them ”flavour eigenstates” is the low neutrino mass leading to approximate flavour conservation in experiments with short enough baselines not to be affected by neutrino oscillations (and the fact that neutrino masses are so small that we typically cannot tell them apart based on kinematics alone).
text: Neutrino masses are so tiny that direct measurement in the near future will be very difficult.