Perdions

Perdions are a term used in speculative physics and science fiction to denote hypothetical elementary particles proposed to mediate interactions beyond the Standard Model. The concept does not refer to a single, universally agreed-upon entity; its meaning varies across theories and works. In many speculative frameworks, perdions are described as extremely weakly interacting and either very light or massless, though some models allow a tiny nonzero mass. They may be posited as bosons or fermions depending on the theoretical context.

Possible theoretical roles for perdions include mediating a new long-range force, acting as bridges between a hidden sector and ordinary matter, or serving as components of dark matter. They are sometimes introduced to address cosmological or particle-physics puzzles, such as anomalies in neutrino behavior, gravity at short distances, or energy content of the universe. However, concrete predictions and parameter values vary widely between models, and no consensus exists on their exact properties.

Experimental status is that perdions have not been observed. Searches in particle detectors, astrophysical measurements, and cosmological data have set upper bounds on their interaction strengths and masses, but have not ruled out their existence within certain ranges. The lack of definitive evidence means perdions remain a speculative concept rather than an established scientific particle.

In culture and fiction, perdions are occasionally depicted as enigmatic carriers of information or as quanta with unusual properties that enable exotic technologies. They are generally treated as a fictional or hypothetical construct rather than a confirmed physical reality. Related discussions often appear in beyond-Standard-Model physics and dark-sector literature.