Reflections on the origin of the EMC effect
Date
2018
Authors
Thomas, A.W.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
International Journal of Modern Physics E: nuclear physics, 2018; 27(12):184001-1-184001-10
Statement of Responsibility
Anthony W. Thomas
Conference Name
Abstract
In the 35 years since the European Muon Collaboration announced the astonishing result that the valence structure of a nucleus was very different from that of a free nucleon, many explanations have been suggested. The first of the two most promising explanations is based upon the different effects of the strong Lorentz scalar and vector mean fields known to exist in a nucleus on the internal structure of the nucleon-like clusters which occupy shell model states. The second links the effect to the modification of the structure of nucleons involved in short-range correlations, which are far off their mass shell. We explore some of the methods which have been proposed to give complementary information on this puzzle, especially the spin-dependent EMC effect and the isovector EMC effect, both proposed by Cloët, Bentz and Thomas. It is shown that the predictions for the spin-dependent EMC effect, in particular, differ substantially within the mean-field and short-range correlation approaches. Hence, the measurement of the spin-dependent EMC effect at Jefferson Lab should give us a deeper understanding of the origin of the EMC effect and, indeed, of the structure of atomic nuclei.
School/Discipline
Dissertation Note
Provenance
Description
This article is part of the issue:
Special Issue on Nuclear Physics, Neutrino Physics and Fundamental Symmetries: Ernest M. Henley Memorial Issue
Access Status
Rights
Copyright Status Unknown