介子

Though unstable , many mesons last a few billionths of a second, long enough to be observed with particle detectors.

介子虽然不稳定，许多介子只存在10亿分之几秒，但用粒子探测器已足以观察到它们。

Though unstable, many meson s last a few billionths of a second, long enough to be observed with particle detectors.

介子虽然不稳定，许多介子只存在10亿分之几秒，但用粒子探测器已足以观察到它们。

The effects of hot/dense hadronic environment on the spectral function of p meson is analyzed. It is found that hot/dense environment plays an important role to the spectral function: when the temperature or the density is not too high.

本文基于虚时形式的有限温度场论，分析了热密强作用物质环境对ρ介子性质的影响，计算得到了ρ介子的谱函数。

Content: Radiative decays of light mesons are important aspects in low-energy hadronic physics, through which structures and properties of light mesons can be revealed.

内容摘要：轻介子辐射衰变是低能强子物理研究的重要方向，通过它能够揭示轻介子的结构和性质。

In this paper we calculate the normalization constants mp_ 0π and mp_ 0K of the twist-3 distribution amplitudes of the pion and kaon from the QCD sum rules,instead of using the equations of motion.

用QCD求和规则计算了π介子和K介子的两个twist3分布振幅的归一化常数mp0π和mp0K。

The multiparticle Bose-Einstein correlations of pions and kaons produced by a surface hadronization of the quark-gluon plasma droplets are calculated.

计算了由夸克-胶子等离子体颗粒表面强子化所产生的π介子和K介子的多粒子玻色-爱因斯坦关联。

With this improved method, both the ground state and the excited states of flavor off-diagonal pseudo-scalar mesons are well described.

经过这一改进后，&味—非对角&赝标量介子的基态和激发态得到了较好的描述，更多介子的结果将在近期内给出。

The density de-pendence of the meson mass and other dynamical properties of mesons has themuch stronger than that in the NJL model.

介子质量以及介子的其它动力学性质的密度依赖性比NJL模型的结果更强。

The moving muons are like the grandfather, they are the ones performing the round trip journey and experiencing all the forces needed to steer them on their course and bring them back to their starting point.

运动的介子就像祖父，他们做着圆周运动，承受着用来保持运动状态和回到初始位置的所有受力，静止的介子就像孙女；它们的以正常的速度变老，比运动的那些要老得更快或&死&得更早。

Kanetada Nagamine,"Introductory Muon Science"Cambridge University Press | 2003 | ISBN: 0521038200, 0521593794 | 224 pages | PDF | 3,3 MBThis volume describes applications of muons in science and engineering.

包忠长峰，&μ介子科学导论&剑桥大学出版社| 2003 |书号：0521038200，0521593794 | 224页| PDF格式| 3，3 MB的本卷介绍了在科学和工程介子应用。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。