Protonoivan

Protonoivan is a fictional subatomic particle proposed in speculative physics and in science fiction narratives. The name blends 'proton' with a fictional suffix -oivan, used across various works to denote a novel baryon-like excitation.

In most depictions, protonoivan is a light, baryon-number-carrying particle that participates in strong interactions and may couple to the weak force. Authors vary its mass from a few hundred MeV to around a GeV and give it short or long lifetimes, with decay channels to lighter baryons and leptons or to dark-sector states.

Status: Not part of the Standard Model; no experimental evidence; used as a theoretical tool in thought experiments about baryogenesis, hadronization, or beyond-Standard-Model scenarios.

In culture: Appears in science fiction novels, game supplements, and speculative physics essays as a device to explore new physics and their implications.

See also: Proton, Neutron, Baryon, Meson, Quark, Dark matter, Baryogenesis, Beyond the Standard Model.