Assertion: lepton's neutrino | /r/HasAspect | mass
Facets:
value: through the observation of neutrino oscillations
type: MANNER
Source sentences:
text: Certain neutrino-less decay modes are kinematically allowed but are, for all practical purposes, forbidden in the Standard Model, even given that neutrinos have mass and oscillate.
text: There is no direct evidence that neutrinos have mass.
text: However, it may be possible to infer that neutrinos have mass through the observation of neutrino oscillations, a quantum mechanical effect that can be observed only if each neutrino species has a different mass.
text: The quantum mechanical effect called neutrino oscillations provides one method—if neutrinos have mass.
text: Nevertheless, as neutrinos have mass, their helicity is frame-dependent, so it is the related frame-independent property of chirality that is relevant here.
text: The Nobel prize in Physics 2015 was awarded to both Takaaki Kajita and Arthur B. McDonald for their experimental discovery of neutrino oscillations, which demonstrates that neutrinos have mass.
text: While this shows that neutrinos have mass, the absolute neutrino mass scale is still not known.
text: Studies of neutrinos produced in the interactions of cosmic rays in Earth’s atmosphere also indicate that neutrinos have mass, but further experiments are needed to understand the exact masses involved.
text: You could also explain why they suspect neutrinos may have mass.
text: Neutrino oscillations are the reason why they suspect neutrinos have mass, and it's mentionned.
text: However if neutrinos have mass and can change flavor, for example, if muon neutrinos can change into electron neutrinos and vice versa, then only L is conserved .