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Off-shell sensitivity, repulsive correlations and the pion-nucleus optical potential

Journal Article:

Abstract

Repulsive nucleon-nucleon correlations tend to reduce the dependence of pion-nucleus elastic scattering upon the off-shell pion-nucleon dynamics. However, optical potential calculations can in practice be quite sensitive to the particular choice of off-shell model parameters. It is argued that this sensitivity results from the nature of the optical potential as a one-body operator which introduces extra off-shell dependence not found in physical many-body process itself. Thus, one must be very careful in any attempt to extract correlation or off-shell information, or to predict pion-nucleus phase shifts, by means of an optical potential theory. Results of model calculations are presented for purposes of illustration.
Authors:
Keister, B D [1] 
  1. Carnegie-Mellon Univ., Pittsburgh, Pa. (USA). Dept. of Physics
Publication Date:
Jul 01, 1977
Product Type:
Journal Article
Reference Number:
AIX-08-345738; EDB-78-028957
Resource Relation:
Journal Name: Z. Phys., A; (Germany, Federal Republic of); Journal Volume: 282:3
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; HARD-CORE POTENTIAL; CORRELATIONS; PION REACTIONS; ELASTIC SCATTERING; CARBON 12; INTERACTION RANGE; MULTIPLE SCATTERING; NUCLEON-NUCLEON POTENTIAL; OPTICAL MODELS; PHASE SHIFT; CARBON ISOTOPES; CHARGED-PARTICLE REACTIONS; DISTANCE; EVEN-EVEN NUCLEI; HADRON REACTIONS; ISOTOPES; LIGHT NUCLEI; MESON REACTIONS; NUCLEAR POTENTIAL; NUCLEAR REACTIONS; NUCLEI; SCATTERING; STABLE ISOTOPES; 653003* - Nuclear Theory- Nuclear Reactions & Scattering
OSTI ID:
5280172
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: ZPAAD
Submitting Site:
INIS
Size:
Pages: 315-320
Announcement Date:

Journal Article:

Citation Formats

Keister, B D. Off-shell sensitivity, repulsive correlations and the pion-nucleus optical potential. Germany: N. p., 1977. Web.
Keister, B D. Off-shell sensitivity, repulsive correlations and the pion-nucleus optical potential. Germany.
Keister, B D. 1977. "Off-shell sensitivity, repulsive correlations and the pion-nucleus optical potential." Germany.
@misc{etde_5280172,
title = {Off-shell sensitivity, repulsive correlations and the pion-nucleus optical potential}
author = {Keister, B D}
abstractNote = {Repulsive nucleon-nucleon correlations tend to reduce the dependence of pion-nucleus elastic scattering upon the off-shell pion-nucleon dynamics. However, optical potential calculations can in practice be quite sensitive to the particular choice of off-shell model parameters. It is argued that this sensitivity results from the nature of the optical potential as a one-body operator which introduces extra off-shell dependence not found in physical many-body process itself. Thus, one must be very careful in any attempt to extract correlation or off-shell information, or to predict pion-nucleus phase shifts, by means of an optical potential theory. Results of model calculations are presented for purposes of illustration.}
journal = {Z. Phys., A; (Germany, Federal Republic of)}
volume = {282:3}
journal type = {AC}
place = {Germany}
year = {1977}
month = {Jul}
}