Question: In particle physics, a massless particle is an elementary particle whose invariant mass is zero, the discovery of this phenomenon, known as neutrino oscillation, led to which Japanese physicist, known for neutrino experiments at the Kamiokande and its successor, Super-Kamiokande, shared the 2015 Nobel prize in physics?
Sentence (from "Massless particle"): The two known massless particles are both gauge bosons: the photon (carrier of electromagnetism) and the gluon (carrier of the strong force).
Relevant evidence: No