We investigate deep inelastic scattering from 3 He and 3 H within a conventional convolution treatment of binding and Fermi motion effects. Using realistic Faddeev wave functions together with a nucleon spectral function, we demonstrate that the free neutron structure function can be extracted in deepinelastic scattering from A = 3 mirror nuclei, with nuclear effects canceling to within 2% for x < ∼ 0.85.
A one-boson exchange ͑OBE͒ potential model, based on the Nijmegen model D potential, for the 1 S 0 , SϭϪ2 interaction is analyzed with emphasis on the role of coupling between the ⌳⌳, N⌶, and ⌺⌺ channels. Singlet scalar exchange, an approximation to two-pion exchange, is significant in all channels; surprisingly, the one-pion exchange component is almost negligible. The size of the channel coupling as a function of the overall strength of the OBE model potential is examined. Implications of the analysis for the binding energy of ⌳⌳ 6 He are considered; the new experimental datum may suggest a consistency between the extracted ⌳⌳ matrix element and the relation implied by SU͑3͒ among OBE baryon-baryon interactions.
The spectral functions and light-cone momentum distributions of protons and neutrons in 3 He and 3 H are given in terms of the three-nucleon wave function for realistic nucleon-nucleon interactions. To reduce computational complexity, separable expansions are employed for the nucleon-nucleon potentials. The results for the light-cone momentum distributions suggest that they are not very sensitive to the details of the two-body interaction, as long as it has reasonable short-range repulsion. The unpolarized and polarized structure functions are examined for both 3 He and 3 H in order to test the usefulness of 3 He as a neutron target. It is found that the measurement of the spin structure function of polarized 3 H would provide a very clear test of the predicted change in the polarized parton distributions of a bound proton.
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