Relativistic treatment of spin-transfer observables in quasielastic (p→,n→) scattering

C. J. Horowitz and J. Piekarewicz
Phys. Rev. C 50, 2540 – Published 1 November 1994
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Abstract

We calculate all spin-transfer observables for the quasielastic (p→,n→) reaction in a relativistic plane-wave impulse approximation. The nuclear structure information is contained in a large set of nuclear response functions that are computed in nuclear matter using a relativistic random-phase approximation to the Walecka model. A reduced value of the nucleon mass in the medium induces important dynamical changes in the residual isovector interaction relative to its nonrelativistic counterpart. As a result, good agreement is found for all spin observables—including the spin-longitudinal to spin-transverse ratio—when compared to the original (q=1.72 fm1) NTOF (neutron time-of-flight facility) experiment. In contrast, the spin-longitudinal to spin-transverse ratio is underpredicted at q=1.2 fm1 and overpredicted at q=2.5 fm1. We comment on the role of distortions as a possible solution to this discrepancy.

  • Received 1 July 1994

DOI:https://doi.org/10.1103/PhysRevC.50.2540

©1994 American Physical Society

Authors & Affiliations

C. J. Horowitz

  • Nuclear Theory Center and Department of Physics, Indiana University, Bloomington, Indiana 47505

J. Piekarewicz

  • Supercomputer Computations Research Institute, Florida State University, Tallahassee, Florida 32306

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Vol. 50, Iss. 5 — November 1994

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