Science General · Question

In quantum physics, which of these theorised sub-atomic particles has yet to be observed?

Answer

Graviton

The story behind the answer

Graviton is correct because, unlike the gluon (seen via three-jet events at PETRA in 1979), the tau neutrino (directly detected in 2000 by DONUT), and the Z boson (discovered at CERN in 1983), it has never been observed. The graviton is the hypothetical quantum carrier of gravity—a

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