Quark and antiquark jets are identified from the 2 - jet events in e + e ~ collisions at 91 . 2gev by checking them at parton level 结果表明，喷注内部的动力学起伏的各向异性随着截断参数y _ cut的变化面明显地改变
2.
A quark ( or an antiquark ) from the projectile hadron radiates a virtual photon on impact on the target , the photon subsequently decays into a lepton pair 入射强子中的一个夸克(或反夸克)在靶的作用下辐射出一个虚光子，虚光子再衰变成正反轻子对。
3.
But about 50 trillionths of a trillionth ( 5 10 - 23 ) of a second later , all the quarks , antiquarks and gluons recombine into hadrons that explode outward into the surrounding detectors 但在兆兆分之50 （ 5 10 - 23 ）秒后，所有的正反夸克与胶子就又重新结合为强子而向外爆发，进入周围的侦测器中。
4.
The nuclei and their constituent protons and neutrons literally melt , and many more quarks , antiquarks ( antimatter opposites of the quarks ) and gluons are created from all the energy available 在此原子核与其组成的质子与中子真的就融化了，而从所有可用的能量之中，创生出更多的夸克、反夸克（夸克的反物质）与胶子。
5.
This thesis studied the dynamical fluctuations inside the single jets in 2 - jet events and the quark and gluon jets in 3 - jet events carefully to explore the dynamics of strong interaction . the dynamical fluctuations inside the single - jets , the quark jets aad antiquark jets are studied using monte carlo method respectively 本文对e ~ + e ~ -碰撞产生的2 -喷注事件中的单喷注子样本和3 -喷注事件中的夸克喷注及胶子喷注子样本内部的动力学起伏进行仔细地研究
6.
By comparing theoretical predictions with experimental data , one can obtain a valuable information on the form of the qq interaction potential . such information is of great practical interest , since at present it is not possible to obtain the quark - antiquark ( qq ) potential in the whole range of distances from the first principles of qcd 夸克势模型是其中重要的模型之一，它不仅能研究强子的基态，而且能研究激发态，但是，源于在中和大距离与qcd真空的复杂结构有关的非微扰特征，还不可能获得整个距离范围内的夸克?反夸克相互作用势。
7.
Adopting the assummation that the quark interaction is the sum of the usual one - gluon direct exchange and the mixture of linear scalar and vector potentials , we structure the relativistic corrections of order v2 / c2to the cornell potential , including the annihilation potential for the quark and antiquark of the same favors which plays the same role with the one - gluon direct exchange at short distances . the effects of the relativistic corrections on the hyperfine splittings of quarkonium states are discussed , and a good fit to the available experimental data is obtained on heavy quarkonium mass spectra 采纳库仑势源于单胶子直接交换，而线性禁闭源于标量和矢量的混合，同时考虑在短程区域与单胶子直接交换起同样作用的同味正反夸克的湮灭，构造了静态夸克-反夸克势到v ~ 2 c ~ 2级次的完全相对论修正，并拟合计算了重介子偶素的能谱，讨论了相对论修正对重介子偶素能级分裂的作用。
