Study on screening of rennet in Quark procession;

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

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 .

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.

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

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.

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

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.

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.

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.