Using the effective action we got in a nuclear matter , we calculate the decay constant / ? and tt mass m - jf as functions of the chemical potential 利用我们得到的核物质中的有效作用量，我们计算了介子的衰变常数和质量，他们都是化学势的函数。
They strike the gases of the earth ' s atmosphere at great speeds , creating showers of debris including streams of electron - like particles called muons 它们高速撞击地球大气层气体，造成大量碎片，其中包括介子流（介子是一种类似电子的微粒） 。
A discovery that neutrinos , virtually massless particles , convert into other forms known as muon and tau before they leave the sun , solving a 40 - year - old mystery 发现中微子（几乎是无质量的粒子）在离开太阳之前可转化介子，解开了一个40年的谜。
Both the reaction and nucleon removal cross section are derived with or without considering the meson production , and the relevant expressions are given 讨论了有和无介子产生两种情况下的晕核散射反应截面和核子逃逸截面，给出了相应的计算公式。
Second , the quark potential has to be at present determined phe - nomenologically due to qcd nonperturbation and the mechanism of quark confinement is still in search 尹其次，由于夸克势只能唯象地得到，夸克禁闭机制及其对重介子的影响仍在探索之中
At the cern sps energy , the - mesons are mostly produced in primordial collisions and final state interactions at the hadronic stage do not play a significant , role ， lh极少参加冉作叫所以。介子大要； ‘ ， ‘上于初始碰捣，强子化阶段的再散射时。
Further works are clearly needed to develop the model to reach a better understanding of the heavy meson properties , and to extend investigation of baryon properties 进一步的工作需要考虑模型本身的完善来达到对重介子性质的更好理解，并将这个势扩展到对重子性质的研究
Further work is needed to extend this new potential to investigate other properties of heavy mesons and the properties of baryons so as to test the reliability of this potential 进一步的工作需要扩展这个新的势对重介子其它性质和重子性质的研究，以便检验这个势的可靠性。
The numerical analysis shows that the existence of ( superscript - ) meson condensate has an obvious influence on the particle fractions of neutron star matter 研究表明， (上标- )介子凝聚的存在对中子星物质的粒子分布有明显影响，使(上标- )粒子出现推迟， (上标+ )粒子出现提前。
Our investigations show the ratio of the yield of k + to k depends on the size of the nuclear systems , which is mainly caused by the absorption effect of the k in the nuclear medium 我们的研究表明k k产额比是与核系统大小相关的，这种相关性与k介子在核介质中所受的吸收效应有关。
