介子

Firstly, the effect of axial vector meson 〓(1282) upon the moment of inertia and the masssplittings of solitons are studied in the model, which comes from a U(2)〓×U(2)〓chiral meson theory.

首先，从一个U(2)〓× U(2)〓手征介子理论出发，通过模型，考察轴矢量介子〓(1282)对孤立子转动惯量和重子多重态质量劈裂的影响。

Out of everyone's expectations , Jie Zitui was such an obstinate person that he would rather be burnt to death than go out.

后来，有人在晋文公面前提起了介子推；也有的说是介子推自己写了首诗《龙蛇之歌》，讽刺晋文公，这诗让晋文公看到了。

Starting from the six-quark-diagram scheme and low energy effective Hamiltonian,we calculate the various Feynman diagram s in the charmless hadronic B-meson decays for the two body pseudoscalar meson final states within the framework of perturbative QCD.

在微扰 QCD框架下，利用六夸克图方案及低能有效哈米顿，对于两体赝标介子末态，给出了诱导 B介子无璨弱衰变过程的不同费曼图的计算。

This text uses two kinds of methods to study the mass of meson which changes with the increasing density.

本文用了两种方法来研究介子的质量随核物质密度的变化，一种是介子自能方法，一种是重整化群方法。

However, what have good fortune is to heed meson, it is analogous to photon.

然而，什么是好的办法？注意介子，注意介子的特性，它类似于光子，！

This thesis focuses on the spectral function of rho meson in hot and dense pion medium.

本文主要讨论了热密π介子环境中的ρ介子谱函数。

Since ρ〓,ω are neutral vector mesons, the G-parity breaking is caused by the isospin symmetry breaking. We study the form factor of π, F〓, which is an important observable related to ρ〓-ω mixing problem.

在这个问题中，由于ρ〓，ω都是中性矢量介子，因此G宇称的破坏主要是由同位旋对称性破缺引起，在讨论这个问题时我们首先讨论了对ρ〓-ω问题有重要意义的π介子的电磁形状因子F〓。

At this stage, one important remaining source of background is due to muon-neutrino CC backgrounds which can be mistaken from electron-neutrino ones when the muon is not seen in the detector.

在这个阶段，剩下的一个重要来源的背景是由于介子，中微子消委会背景可以从错误的电子中微子的当介子是没有见过的探测器。

These effective coupling constants of mesons embody the feature of theDBHF results, such as short-range correlations and the structure of isospin. In general,the effective meson coupling constants are weakly density dependent.

我们得到的介子耦合常数具有弱的密度依赖行为，δ和ρ介子的有效相互作用强度远小于在平均场中起主要作用的σ和ω介子。

In the "indirect" process, first observed in neutral kaon particles in 1964, quantum mechanics allows particles to change into their antiparticles and back again in a process known as "mixing". In 2001, The BaBar team, working at the Stanford Linear Accelerator -- and independently the Belle collaboration at the KEK laboratory in Japan -- were the first experiments to detect this in a B meson. BaBar observed "direct" CP violation in 2004 by showing that the number of decays observed for B mesons was higher than for their antiparticle equivalents.

在&间接&过程中，量子力学允许粒子在一种被称为&混合&的过程中，在自身与其反粒子之间相互转变。1964年人们第一次在中性K介子上观测到这种现象。2001年，在斯坦福直线加速器中心工作的BaBar研究组和另一个日本高能加速器研究中心的Belle研究小组各自独立地第一次在实验中观测到这种现象发生在B介子上。2004年，BaBar小组观测到了&直接&电荷宇称不守恒，他们发现观察到的B介子的衰变数量要高于其对应的反物质。

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％。