1997/09/16 by Daniel S. Koltun · 1 citation
Physics and Astronomy · #Atomic physics #Computer science #Energy (signal processing) #High-Energy Particle Collisions Research #Interpretation (philosophy) #Nuclear physics #Nuclear physics research studies #Nuclear reaction #Nucleon #Particle physics #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Random phase approximation #Scattering #nucl-th
paper · pdf · doi:10.1103/physrevc.57.1210
published as Phys.Rev.C57:1210-1217,1998 · 16 pages, LaTeX, no figures, submitted to Phys. Rev. C
arxiv created 1997/09/16 · openalex publication_date 1998/03/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Conventional theories of nuclear interactions predict a net increase in the distribution of virtual pions in nuclei relative to free nucleons. Analysis of data from several nuclear experiments has led to claims of evidence against such a pion excess. These conclusions are usually based on a collective theory [random-phase approximation (RPA)] of the pions, which may be inadequate. The issue is the energy dependence of the nuclear response, which differs for theories with strong NN correlations from the RPA predictions. In the present paper, information about the energy dependence is extracted from sum rules, which are calculated for such a correlated, noncollective nuclear theory. The results lead to much reduced sensitivity of nuclear reactions to the correlations that are responsible for the pion excess. The primary example is (\stackrel\ensuremath→p,\stackrel\ensuremath→n) spin transfer, for which the expected effects are found to be smaller than the experimental uncertainties. The analysis has consequences for deep inelastic scattering experiments as well.