Hypotheses in physics

radiation with a blackbody spectrum radiated from an event horizon

hypothetical type of exotic matter whose mass is of opposite sign to the mass of normal matter

prediction that an accelerating observer will observe blackbody radiation where an inertial observer would observe none

A strangelet (pronounced ) is a hypothetical particle consisting of a bound state of roughly equal numbers of up, down, and strange quarks. An equivalent description is that a strangelet is a small fragment of strange matter, small enough to be considered a particle. The size of an object composed of strange matter could, theoretically, range from a few femtometers across (with the mass of a light nucleus) to arbitrarily large. Once the size becomes macroscopic (on the order of meters across), such an object is usually called a strange star. The term "strangelet" originates with Edward Farhi a

Predicted physical phenomenon in QED

physical process for creating a positron-electron pair from the collision of two photons

nuclear physics process that has not been observed yet

hypothesised phenomenon in quantum field theory

interactions between elementary particles that change a particle’s flavor without changing its electric charge