下夸克

除标准模型的Z°玻色子和15个费米子以外：其它氏族的费米子均是下夸克，无上夸克，因此由这些夸克组成的强子将跟现有标度的不同。

The all of fermions in the clans are down quarks except for the standard model which consists of Z bosons and 15 fermions , therefore , the spectrum of the hadrons which are composed of these down quarks are different from hadrons at present .

下夸克质量和味混合

Down - quark masses and flavor mixing

最后利用有限温度场论，讨论了在高温度下夸克禁闭解除的可能性，并计算出了禁闭解除的可能的转变温度。

The confinement behavior at finite temperatures is also investigated and shown that color confinement at zero temperature can be melted away at high temperature .

对于后者，当存在非零流夸克质量情况下，夸克传播子所满足的DS方程存在着两个定性不同的解。

For the later , it is shown on general ground that there exist two qualitatively distinct solutions for the quark propagator in the case of non-zero current quark mass .

弱磁场及甚强磁场下奇异夸克物质Urca过程的中微子能量损失率

The Neutrino Emissivity of Urca Process of Strange Quark Matter in Weak and Ultra Strong Magnetic Field

相对论效应对有限温下重夸克偶素的性质的影响

Study of Relativistic Effect on Heavy Quarkonium in a Thermal Environment

高温近似下奇异夸克物质的体粘滞系数

Bulk Viscosity of Strange Quark Matter in High Temperature Approximation

准粒子描述下奇异夸克物质自洽热力学及对奇异星物态的影响

Consistent Thermodynamics of SQM and EOS of Strange Stars in Quasi-Particle Description

夸克流算子可以用路径积分在QCB框架下由夸克外源表示出来。

We represent the quark current operators with path integral in QCD framework .

新的质量标度下奇异夸克物质的电荷与临界密度

Charge Dependence of the Critical Density of Strange Quark Matter in a New Mass Scaling

在通常情况下，夸克被禁闭在强子中，不存在自由夸克。

In ordinary circumstance , quarks and anti-quarks is confined in hadrons , there is no free quarks and anti-quarks .

利用从格点规范理论计算得出的，包括色屏蔽效应的禁闭位势；研究了重子结构，计算了重子谱及相应状态下的夸克分布的均方根半径。

A confinement potential which obtained from the lattice-gauge-theory has been used to study the spectrum of baryon and the rms of the quark distribution .

作为费米子，高密下的夸克可以像电子一样配对产生色超导，中子星由致密的核物质组成，有学者认为色超导在中子星中存在。

Being fermions , at high density quarks can pair and thus produce color superconductor like electrons pairing . There is compact nuclear matter in a neutron star .

在mQ→∞的极限下，重夸克系统的自旋-味对称性在重味物理中起着重要的作用。

In the limit mQ →∞, the Spin-Flavor symmetry of heavy quark plays an important role in heavy flavor quark .

在弛豫时间近似下QGP中夸克输运系数的一种计算

A Calculation for Transport Coefficients of Quarks in QGP Under the Relaxation Time Approximation

本文利用我们已经给出的在带头对数近似下强子价夸克分布函数的解析表达式，讨论了π介子价夸克分布函数的QCD行为，很好地解释了现有的π介子价夸克分布函数数据。

Using the analytic expression for valence quark distribution function of hadron in the leading logarithm approximation given by paper , we discuss the QCD behaviour for the valence quark distribution function of pion . The existing data for valence quark distribution function of pion are explained excellently .

作为应用，研究了有限化学势下冷密夸克物质系统的色动力学并计算出了色导率。

The theory is then applied for studying the color electric dynamics of cold and dense quark matter at large chemical potential , and color conductivity with non-perturbation effect is obtained .

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。

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

在中等密度下，由于奇异夸克质量，β平衡，荷中性条件等影响情况变得非常复杂。

The situation becomes more complicated in moderate density because of the strange quark mass , β equilibrium and the charge neutrality conditions .

在夸克的弱相互作用基下，得到了下夸克质量矩阵的唯象约束条件。

The phenomenological constraints on the down-quark mass matrix in the weak interaction base were investigated .

在准粒子描述下，采用自洽的热力学方法，考虑奇异夸克物质（SQM）的介质效应，计算了高温近似下奇异夸克物质的体粘滞系数。

Taking medium effects into account , we calculate the bulk viscosity of strange quark matter in high temperature approximation using a consistent thermodynamics method in quasi particle description .