Quenching of the analyzing power for inclusive quasielastic (p→,p') scattering

Abstract

Within the context of a nonrelativistic semiclassical distorted wave (SCDW) model, we demonstrate that the experimentally observed reduction of the inclusive quasielastic 208 Pb( p, p ) analyzing power relative to the value for free NN scattering, at incident laboratory kinetic energies of 290 and 200 MeV and at the centroid of the quasielastic peak, is mainly attributed to nuclear medium modifications of the NN effective interaction and also nuclear distortion effects on the scattering wave functions. In addition, the SCDW model also provides a satisfactory quantitative description of the unpolarized double differential cross section.

Brieva–Rook localization of the microscopic nucleon–nucleus potential

“…i.e., K (R) is evaluated self-consistently. LSCA has been successfully applied to studies on cross sections and spin observables for multistep direct (p, p ′ x) and (p, nx) processes as well as hyperon production cross sections [23].…”

Off-the-energy-shell pp scattering in the exclusive proton knockout 12C(p,2p) reaction at 392 MeV

“…Analysis of the spin observables, the analyzing power A y in particular, with the present DWBA calculation, after inclusion of the spin-orbit part of the distorting potential as in Ref. [11], will be very interesting and important.…”

“…Moreover, effects of refraction, i.e., change in the kinematics of the incoming and outgoing protons caused by distortion of the target nucleus, were also neglected. Since the refractive effect was shown to be essential to reproduce A y data of inclusive (p, p ′ x) reactions [11], it is expected to be significant in the calculation of spin observables of also (p, 2p) reactions. Careful analysis of the (p, 2p) reactions with nonrelativistic DWIA taking account of the above-mentioned effects is necessary to draw a conclusion on the comparison between nonrelativistic calculation and experimental data of (p, 2p) reactions.…”

“…Similarly, the local momenta k ′ 1 (R) and k ′ 2 (R) dictate the final states of the two protons of the transition by τ . This change in the magnitudes and the directions of the momenta of the incoming and outgoing protons is referred to as the refractive effect of distortion, which was shown to play an essential role in the accurate description of (p, p ′ x) reactions [11]. Another remark on M of Eq.…”