２４ Standard theory(Standard model)【What is the Universe？】Dialogue with the Universe
・Weinberg-Salam theory and quantumchromodynamics are the foundation of elementary particle physics, and are called standard theory or standard model.
・It is shown clearly that the dark matter occupies about 1/4 of the energy density of the universe. However, the particles which serve as a candidate of the dark matter do not exist in a standard model. Therefore, to ask elementary particle for the true character of the dark matter, extension of a standard model is required.