Fermio

Fermio is a fictional elementary particle used in speculative physics narratives and science fiction to illustrate properties of fermionic matter beyond the standard model. The term is not part of established particle physics, and there is no experimental confirmation of a real particle named fermio. The name combines "fermion" with the -io suffix common in particle nomenclature, signaling its status as a fermionic excitation.

In the imagined framework, fermios are fermions with half-integer spin and obey the Pauli exclusion principle. They are described as carrying a new type of conserved charge, denoted F, and interacting with a hypothetical U(1)F gauge field. The presence of the F charge would lead to distinctive signatures in collisions or in condensed-matter analogs, such as quantized conductance steps or unique spectral lines, depending on the fictional model.

Possible roles of fermio in theoretical discussions include serving as a driver for exotic states of matter, such as spin liquids, or as a stand-in for dark-sector fermions that interact weakly with standard model particles. Because fermio is a construct of imaginative models, its properties vary by author and context; common features emphasize fermionic statistics and a new interaction channel.

In popular culture and education, fermio is used to illustrate the idea that adding new fermionic degrees of freedom can enrich the phase structure of a theory, and to discuss how experimentalists search for indirect signs of new fermions through precision measurements or astrophysical observations.