Bosonsunder

Bosonsunder is a fictional term used in speculative physics and science fiction to denote a hypothetical class of bosons that arise under an additional symmetry sometimes called the Under symmetry. In these scenarios, bosonsunder would mediate a previously unknown interaction, or modify the behavior of known forces, particularly in regimes not well tested by experiment. The concept is used as a thought tool to explore how extra symmetries could be realized and how new gauge bosons might behave.

In typical toy models, bosonsunder are envisioned as spin-1 or spin-0 particles with integer spin. They would couple to standard model fields via a new gauge interaction associated with the Under symmetry, possibly mixing with known gauge bosons or interacting with dark-sector states. Mass could be generated by spontaneous symmetry breaking, yielding either a light mediator or a heavy resonance, depending on the model parameters. Some variants posit that bosonsunder act mainly in high-density or high-energy environments, such as the early universe or compact astrophysical objects, while remaining effectively undetectable under ordinary conditions. Because the idea is speculative, the precise properties vary widely between proposals.

Criticism notes that there is no empirical evidence for bosonsunder, and that adding new gauge bosons introduces challenges such as constraints from precision measurements, astrophysical data, and collider searches. Proponents argue that studying such hypothetical particles helps illuminate potential gaps in the Standard Model and guides the design of experiments searching for new physics.

See also: Boson, Gauge boson, Beyond the Standard Model, Dark photon, Hidden sector.