Relativistic Impulse Approximation, Nuclear Currents, and the Spin-Difference Function

D. A. Sparrow; J. Piekarewicz; E. Rost; J. R. Shepard; J. A. McNeil; T. A. Carey; J. B. McClelland

doi:10.1103/PhysRevLett.54.2207

Relativistic Impulse Approximation, Nuclear Currents, and the Spin-Difference Function

D. A. Sparrow, J. Piekarewicz, E. Rost, J. R. Shepard, J. A. McNeil, T. A. Carey, and J. B. McClelland

Phys. Rev. Lett. 54, 2207 – Published 20 May 1985

Abstract

Traditional nonrelativistic impulse-approximation treatments of $p$ -nucleus scattering using a local nucleon-nucleon $t$ matrix neglect nuclear currents which are intrinsic to relativistic approaches also employing a local $t$ matrix. Inclusion of these current terms is essential to the understanding of the spin-difference function, $(D_{qk} + D_{kq}) + i (P - A y)$ , as shown by comparison with ${}^{12}C (p, p^{'}) {}^{12}C^{*} (12.71 MeV, 1^{+}, T = 0)$ spin-difference data at 150 MeV.