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Nucleon-nucleon correlations, short-lived excitations, and the quarks within

Author(s)
Hen, Or; Miller, Gerald A; Piasetzky, Eli; Weinstein, Lawrence B
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Abstract
This article reviews our current understanding of how the internal quark structure of a nucleon bound in nuclei differs from that of a free nucleon. The interpretation of measurements of the European Muon Collaboration (EMC) effect for valence quarks, a reduction in the deep inelastic scattering cross-section ratios for nuclei relative to deuterium, and its possible connection to nucleon-nucleon short-range correlations (SRCs) in nuclei are focused on. This review and new analysis (involving the amplitudes of non-nucleonic configurations in the nucleus) of the available experimental and theoretical evidence shows that there is a phenomenological relation between the EMC effect and the effects of SRCs that is not an accident. The influence of strongly correlated neutron-proton pairs involving highly virtual nucleons is responsible for both effects. These correlated pairs are temporary high-density fluctuations in the nucleus in which the internal structure of the nucleons is briefly modified. This conclusion needs to be solidified by the future experiments and improved theoretical analyses that are discussed herein. ©2017 American Physical Society.
Date issued
2017-11
URI
https://hdl.handle.net/1721.1/128351
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Reviews of Modern Physics
Publisher
American Physical Society (APS)
Citation
Hen, Or et al., "Nucleon-nucleon correlations, short-lived excitations, and the quarks within." Reviews of Modern Physics 89, 4 (November 2017): 045002 ©2017 Authors
Version: Final published version
ISSN
1539-0756

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