查询词典 meson

In chapter 3, we made a discussion for the effective Hamiltonian which govern the decay processes of B meson, the derivation and their renormalization group evolution of the Wilson coefficients, and collected all formulas needed in our calculation.

论文的工作部分包含第四、五两章。在第四章，作者分别在标准模型和最小超对称模型下计算了b→sγ和b→sl~+l~-两类衰变过程的分支比，并根据相关实验数据，得到了对部分质量插入参数δ_

In the relativistic σ-ω model, the influence of the parameters in self-interaction of σ meson to the equation of state of normal nuclear matter, especially, to incompressibility, effective mass, and coupling constants, is studied in detail. We find that these parameters have an intense relationship to the property of nuclear matter.

在相对论σ-ω模型里，详细讨论了σ介子的自相互作用参数对正常核物质物态方程的影响，特别是对核物质的不可压缩系数、有效质量，以及σ介子与核子、ω介子与核子之间的耦合常数的影响，发现这些参数与核物质的性质之间有紧密的联系。

The meson mixing effect is found to be important for both the induced current and the dielectric function.

同时我们还发现混合极化不论是对核物质中的极化流还是对介电函数都有不可忽视的贡献。

In all these studies, the vacuum fluctuation on nucleon,Δ-isobar, and σ meson is considered.

在以上所有的分析中，考虑了核子、Δ粒子和σ介子的真空起伏。

People through nuclear reactions, have been synthesized 17 kinds of atomic number greater than 92 of the transuranic elements, and thousands of The new kinds of radioactive nuclides, and by high-energy and ultra-high energy-ray beam and the interaction of atomic nuclei and found hundreds of kinds of short-lived particles, namely, baryon, meson, lepton, and particle resonance states of these particles has led to a new field of study - the birth of particle physics since the age of .70, nuclear physics has entered a deep development and wide application of new, more mature stage, on the one hand the development of particle acceleration and detection techniques, expanding people's research in nuclear means, the other hand, nuclear technology to serve the national economy, for example, for the development and utilization of nuclear energy to provide more accurate nuclear data; the use of isotope tracer technique diagnosis and treatment of disease; the use of radiation and irradiation preservation of food, irradiation breeding .

人们通过核反应，已经人工合成了17种原子序数大于92的超铀元素和上千种新的放射性核素，并且通过高能和超高能射线束和原子核的相互作用，发现了上百种短寿命粒子、即重子、介子、轻子和共振态粒子，对这些粒子的研究导致了一门新学科——粒子物理学的诞生。70年代以来，核物理进入了纵深发展和广泛应用的新的更成熟的阶段，一方面发展粒子的加速技术和探测技术，扩充人们研究原子核的手段，另一方面将核技术服务于国民经济中，例如，为核能的开发利用提供更为准确的核数据；利用同位素示踪技术诊断和治疗疾病；利用射线及辐照技术保存食品、辐照育种等。

So, that meson and μ0 field,ε0 field, they will be concerning it.

因此，介子和μ0，ε0，他们将有关它。

So, that influence of field from space and it can control meson surroundings.

因此，空间的影响它能控制介子环境。

We also show why this meson has not been seen in p experiments.

也说明为什么这个介子没有在p实验中发现的原因。

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，！

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％。