Supersymmetry introduces new particles to theories from "summary" of The Quantum Theory of Fields by Steven Weinberg,Weinberg S
Supersymmetry is a theoretical framework that has been proposed as an extension of the standard model of particle physics. One of the key features of supersymmetry is that it introduces new particles to theories. These new particles, known as superpartners, are associated with the existing particles in the standard model. In supersymmetric theories, every known particle in the standard model has a corresponding superpartner. For example, the electron has a superpartner called the selectron, the quark has a superpartner called the squark, and so on. These superpartners are predicted to have the same properties as their corresponding particles, such as mass and charge, but differ by half a unit of spin. The introduction of superpartners in supersymmetric theories has several important implications. One of the most significant consequences is that supersymmetry can help to stabilize the mass of the Higgs boson. In the standard model, the mass of the Higgs boson is sensitive to quantum corrections, which can lead to large discrepancies between the predicted and observed values. However, in supersymmetric theories, the contributions from the superpartners cancel out the quantum corrections, leading to a more stable prediction for the mass of the Higgs boson. Another important implication of supersymmetry is that it provides a natural candidate for dark matter. In many supersymmetric theories, the lightest superpartner is stable and weakly interacting, making it a potential dark matter candidate. This connection between supersymmetry and dark matter has motivated a great deal of research in both particle physics and cosmology.- Supersymmetry introduces new particles to theories and has the potential to address some of the outstanding questions in particle physics and cosmology. By extending the standard model to include superpartners, supersymmetry offers a promising framework for understanding the fundamental forces and particles of nature.
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