Quark Aspects of Nuclear Physics

Abstract

ABSTRACT The spin as well as spin-average, twist-two structure function of the deuteron are calculated in a version of the convolution model which incorporates relativistic and binding energy corrections. A simple parametrization of these structure function is given in terms of a few deuteron wavefunction parameters and the free nucleon structure functions calculated using different deuteron models. Deep inelastic scattering from nuclear targets with the spin j1 is interesting for a verity of reason. Among possible targets, the deuteron has a position of privilege because its wavefunction is known for better than that of any other nucleus. The fact that it is rather a dilute neutron-proton bound state allows for the extraction of neutron structure functions F1n, F2n, G1n, G2n which, because of the absence of neutron targets cannot important in view of the current controversial regarding the spin of the proton as deducted from the measurement of G1p. but DIS from a polarized deduction target is important for other reason as well; it was noted rather recently that j 1 target has a total of 8 different structure function which are potentially measurable. One of these denoted by in ref.2 is of considerable interest since it provides a clear measure of possible exotic effects in nuclei, i.e., the extent to which the nuclear ground state deviates from being a composition of nucleons only. A DIS experiment with polarized deuterons at here will allow for the measurement of all deuteron structure functions. In view of the experimental important, it would perhaps he timely of collect together set of simple expression by means of which one could calculated the effect if nuclear feri-motion and, in these brief reports, which correctly embodies relativistic fermi-motion correctios as well as binding energy effects, the limitations of the convolution model have been dwelt upon earlier and will not correctly us here. Other calculation of neutron structures functions has been performed by a number of other using various other formulations of the convolution model. However, the results to be presented below are considerably simpler, and this simplicity affords for an easy comparison between structure functions obtained from different neutron wavefunctions. Moreover, spin-dependent and spin-independent structure function are obtained simultaneously. We also take this opportunity to correct for errors given in the expression for b1D in ref.1.