Pion Cloud and Nucleon Mass in Finite Nuclei
Nuclear Theory
2007-05-23 v1 High Energy Physics - Phenomenology
Abstract
We study the mass of a nucleon in a nucleus using a model recently introduced for a nucleon current with a pion cloud component. The method of QCD sum rules is used to determine the mass shifts for nucleons to first order in nuclear density in oxygen-16 and calcium-40, with the pion propagator determined by an optical potential for pion-nucleus scattering. Mass shifts due to the pionic contributions range from negligible in oxygen to -100 MeV in calcium at central nuclear density, with larger shifts in the nuclear surface. The consistency of this model with chiral perturbation theory is demonstrated.
Keywords
Cite
@article{arxiv.nucl-th/0005005,
title = {Pion Cloud and Nucleon Mass in Finite Nuclei},
author = {Andrew J. Harey and Leonard S. Kisslinger},
journal= {arXiv preprint arXiv:nucl-th/0005005},
year = {2007}
}
Comments
19 pages, 14 figures, revtex, epsf