“quantum chromodynamics”的概念、定义、习题解题方法及翻译-物理辞典

单词	quantum chromodynamics
释义	quantum chromodynamics(QCD) A gauge theory that describes the strong interaction in terms of quarks and antiquarks and the exchange of massless gluons between them (see also elementary particles). Quantum chromodynamics is similar to quantum electrodynamics (QED), with colour being analogous to electric charge and the gluon being the analogue of the photon. The gauge group of QCD is non-Abelian and the theory is much more complicated than quantum electrodynamics; the gauge symmetry in QCD is not a broken symmetry. QCD has the important property of asymptotic freedom – that at very high energies (and, hence, short distances) the interactions between quarks tend to zero as the distance between them tends to zero. Because of asymptotic freedom, perturbation theory may be used to calculate the high energy aspects of strong interactions, such as those described by the parton model
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物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。