Center-of-mass effects on the quasi-hole spectroscopic factors in the 16O(e,e'p) reaction

Details Center-of-mass effects on the quasi-hole spectroscopic factors in the 16O(e,e'p) reaction Center-of-mass effects on the quasi-hole spectroscopic factors in the 16O(e,e'p) reaction

1998-04-28

arxiv.org/abs/nucl-th/9804067v1

Phys.Rev.C57:2308-2315,1998

Physics

Nuclear Physics

Nuclear Theory

14 pages, no figures, uses Revtex, to be published in Phys. Rev. C 58 (1998)

Scientific paper

10.1103/PhysRevC.57.2308

The spectroscopic factors for the low-lying quasi-hole states observed in the 16O(e,e'p)15N reaction are reinvestigated with a variational Monte Carlo calculation for the structure of the initial and final nucleus. A computational error in a previous report is rectified. It is shown that a proper treatment of center-of-mass motion does not lead to a reduction of the spectroscopic factor for $p$-shell quasi-hole states, but rather to a 7% enhancement. This is in agreement with analytical results obtained in the harmonic oscillator model. The center-of-mass effect worsens the discrepancy between present theoretical models and the experimentally observed single-particle strength. We discuss the present status of this problem, including some other mechanisms that may be relevant in this respect.

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