“baryon”的概念、定义、习题解题方法及翻译-物理辞典

单词	baryon
释义	baryon A hadron with half-integral spin. Nucleons comprise a subclass of baryons. According to currently accepted theory, baryons are made up of three quarks (antibaryons are made up of three antiquarks) held together by gluons (see quantum chromodynamics). Baryons possess a quantum number, called the baryon number , which is +1 for baryons, -1 for antibaryons, 1/3 for quarks, -1/3 for antiquarks, and 0 for all other particles such as electrons, neutrinos, and photons. Baryon number has always appeared to have been conserved experimentally, but grand unified theories postulate interactions at very high energies that allow it not to be conserved. It is thought that nonconservation of baryon number at the high energies characteristic of the early universe may provide an explanation for the asymmetry between matter and antimatter in the universe. See proton decay
随便看	red giant redshift reflectance reflecting telescope reflection refracting telescope refraction refractive index refractivity refractometer refractory refrigerant refrigeration Regnault's method regression analysis relative aperture relative atomic mass relative density relative humidity relative molecular mass relative permeability relative permittivity relativistic mass relativistic mechanics relativistic quantum theory

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