d quark

Study on screening of rennet in Quark procession;

夸克生產中凝乳酶篩選的研究

It is the spin of the quarks and precession of quarks-system caused byspin and electromagnetic-weak forces that keeps the particle world stable.

夸克體系是由自旋著的夸克在電磁－弱相互作用下產生的進動維系穩定的；②物質的質量源于夸克的質量，夸克的質量又源于它的自旋。

According to the relationship between the strong interaction force range and strong coupling constant among quarks in a hadron,a brief computational method on the pocket radius of a hadron is given in this paper .

根據夸克間的強作用力程隨強跑動耦合常數的變化關系 ,給出了強子口袋半徑的一種簡明的計算方

Taking linear confining interaction as well as one-gluon-exchange as the mediating coupling,the authors dedrive the coupling potential between quark and quark-antiquark pair,which will be useful to consider the coupling between two and four quark states.

推導了夸克與夸克-反夸克對之間通過不僅單膠子交換,而且線性禁閉相互作用的耦合相互作用勢。

Based on the spin-dependent quark distribution,the spin-dependent proton structure function in the large x region is presented in the paper.

從自旋相關的價夸克分布出發,在部分子四動量較大的區域(大x區域),給出了自旋相關的質子結構函數,并將其理論結果與Capella模型給出的結構函數及NMC實驗結果進行了比較,其理論結果與實驗符合較好。

Taking into account SU(6) symmetrical broken and the correction from PQCD predictions,the paper,with the aid of the quark-diquark picture,from Cappela s proton structure model,extracts a spin-correlation quark distribution with more explicit physical significance.

本文采用質子的夸克-雙夸克模型圖像,考慮到SU(6)對稱性破缺及來自PQCD語言的修正,從Cappela的質子結構模型中提取出了具有更為明確物理意義的自旋相關的夸克分布。

Based on the quark model, the Q 2 evolution of the nucleon spin structure functions in the small Q 2 region is calculated.

利用夸克模型計算了核子的自旋相關結構函數隨Q2 的依賴關系 。

The energies of the low-lying isoscalar and isovector ud■ configurations with spin-parity J~P=0~+, 1~+,and 2~+ are calculated in the chiral SU(3) quark model and the extended chiral SU(3) quark model by using the variational method.

在手征SU(3)夸克模型和擴展的手征SU(3)夸克模型的框架下,用變分的方法系統地研究了同位旋為0、1,自旋宇稱為0~+、1~+和2~+的ud■四夸克系統6個低組態的能量。

We study the decay widths of the narrow resonances D*sj(2317) and Dsj(2460) in the chiral quark model, together with the well-known D* and D*s mesons.

用夸克模型結合Ds,D*s,討論窄共振態D*sj(2317),Dsj(2460)。

By means of the spin-dependent quark distributions in 6-quark clusters extended from a pQCD model, the polarized structure function of deuterons is investigated.

利用基于微擾QCD模型得到的 6夸克集團內部自旋夸克的分布函數 ,研究了氘核極化結構函數的核效應 。