Susy

Susy is a mathematical model used in theoretical physics to describe the fundamental structure of matter. It is an abbreviation for Supersymmetry, a principle that proposes a relationship between two basic classes of elementary particles: bosons, which mediate forces, and fermions, which make up matter.

History

The concept of Susy was first proposed in the early 1970s by Julius Wess and Bruno Zumino. It was further developed by many other physicists, including Edward Witten, John Schwarz, and Michael Green.

Principles

Susy proposes that for every known particle, there is a corresponding superpartner particle. For example, the superpartner of a fermion is a boson, and vice versa. These superpartners have yet to be observed in particle physics experiments, which has led to the development of models that propose they are much heavier than their known counterparts.

Implications

If Susy is correct, it could help solve several major problems in physics. It could explain the nature of dark matter, a mysterious substance that makes up about 27% of the universe. It could also help unify the four fundamental forces of nature - gravity, electromagnetism, the strong nuclear force, and the weak nuclear force - into a single grand unified theory.

Criticisms

Despite its potential benefits, Susy has been criticized for its lack of empirical evidence. The Large Hadron Collider, the world's largest and most powerful particle collider, has yet to detect any superpartners, despite extensive searches. This has led some physicists to question the validity of Susy, and to propose alternative theories.

See also

• String theory
• Quantum field theory
• Standard Model