查询词典 meson

Ii The form factors of heavy pseudoscalar meson decays to light vector mesons are systematically analyzed, in a model independent way.

对重赝标量介子到轻矢量介子跃迁的形状因子作不依赖于模型的分析，给出了1/m〓阶的所有独立的普适函数的数目。

By the study of pseudoscalar meson chiral Lagrangian in QCD, we develop certain useful techniques and experiences which we can generalized to other fields, for example, the investigation of electroweak chiral Lagrangian.

通过赝标介子手征拉氏量的QCD研究，我们发展的计算方法与获得的经验完全可以推广到诸如电弱有效拉氏量等其它领域的研究上去。

Iii The form factors of heavy pseudoscalar meson decays to light vector mesons are calculated in light-cone QCD sum rules.

用光锥QCD求和规则方法计算了重赝标量介子到轻矢量介子的跃迁形状因子。

In addition, we introduce the current status of the light meson spectroscopy and the new hadronic states lying beyond the quark model.

此外，我们简要介绍了轻介子谱的研究现状以及新强子态—胶球和混杂态。

We presented the extraction of Wilson coefficients, the evolvement of the renormalization group and the definition and current experimental progress of CP violation of B meson.

介绍了Wilson系数的抽取和重整化群演化，B介子系统CP破坏的定义和实验测量现状，给出了相关的理论公式，并对目前和未来的B介子实验做了简要的评述。

For example, if in additions to the baryon field, we only consider the σ or ω meson field, the effects of selfconsistency are all significant. It diminishes the continuum part of the spectral representation and makes its single-particle part more important.

例如，除重子场外只考虑σ或ω介子场时，自洽效应均颇显著，但同时考虑σ和ω介子场时，自洽效应却可以忽略，这说明不同的介子场间其自洽效应互有影响。

We first give a brief review on the SM, the SUSY and the B meson weak decays.

首先简要介绍了标准模型、超对称和B介子弱衰变。

We hope to extendedly study the ''string" and ''brane" property to clarify the ''AdS/CFT correspondence and understand the property of Wilson Loop, meson spectrum, Glueball spectrum, etc…in physical system.

我们希望透过研究「弦」与「膜」的性质，来广泛的研究实际物理系统上的「AdS/CFT」对应，以进一步了解包括，Wilson Loop，Meson 质谱，Glueball 质谱等等的性质。

By applying the above mentioned theoretical approaches in the secondhalf of this thesis, we study several phenomenologically interesting problems including the B meson nonleptonic decays, rare decays and the extractionof the CKM matrix element 〓. With the hypothesis of factorization, thetwo-body nouleptonic decays of B mesons are analyzed.

本文的后半部分应用上述理论进展，分别探讨与研究了B介子的非轻衰变，稀有衰变以及CKM矩阵元Vub的抽取等问题，在因子化假设下，我们分析了B介子的二体非轻衰变，并得到〓介子的衰变常数约为280 MeV。

Meson: Any member of a family of subatomic particle s composed of a quark and an antiquark.

介子：由一个夸克和一个反夸克组成的亚原子粒子族。

Anna: No, I've got a hangover.

不是，我昨晚宿醉了。

We head into the mountains in Su's new Land Cruiser, stop for lunch at a scenic restaurant and then hang around drinking beer and eating fruit as two of his employees attempt to lure the birds with a tape recording of the fowl's mating call.

我们坐上苏的巡逻车向山顶出发，在一家风景优美的餐馆吃了中饭。然后我们喝着啤酒吃着水果四处逛。