Symmetries or approximate symmetries play an essential role in physics. Symmetries are related to invariants of the system, i.e. conservation laws and integrals. Therefore a symmetry that holds leads to a substantial reduction of work in the dynamical description. The case of a broken symmetry is equally important. Reasons for a symmetry to be violated can be many-fold, e.g., new forces, new particles, properties/structure of the vacuum state, phase freedom, etc. In its turn the investigation of symmetries provide an excellent tool to find “new physics”.
Discrete Symmetry Elementary Particle Physic Approximate Symmetry Neutron Electric Dipole Moment Standard Model Result
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