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Title: Nucleon-nucleon correlations and the single-particle strength in atomic nuclei

Abstract

We propose a phenomenological approach to examine the role of short- and long-range nucleon-nucleon correlations in the quenching of single-particle strength in atomic nuclei and their evolution in asymmetric nuclei and neutron matter. These correlations are thought to be the reason for the quenching of spectroscopic factors observed in (e,e'p), (p,2p) and transfer reactions. We show that the recently observed increase of the high-momentum component of the protons in neutron-rich nuclei is consistent with the reduced proton spectroscopic factors. Our approach connects recent results on short-range correlations from high-energy electron scattering experiments with the quenching of spectroscopic factors and addresses for the first time quantitatively this intriguing question in nuclear physics, in particular regarding its isospin dependence. We also speculate about the nature of a quasi-proton (nuclear polaron) in neutron matter and its kinetic energy, an important quantity for the properties of neutron stars.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Royal Society; USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1575805
Alternate Identifier(s):
OSTI ID: 1760210
Grant/Contract Number:  
AC02-05CH11231; FG02-94ER40818; ST/M006433/1; ST/P003885/1
Resource Type:
Published Article
Journal Name:
Physics Letters B
Additional Journal Information:
Journal Name: Physics Letters B Journal Volume: 800 Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Spectroscopic factor; single-particle strength; asymmetric nuclei; neutron matter

Citation Formats

Paschalis, S., Petri, M., Macchiavelli, A. O., Hen, O., and Piasetzky, E. Nucleon-nucleon correlations and the single-particle strength in atomic nuclei. Netherlands: N. p., 2020. Web. doi:10.1016/j.physletb.2019.135110.
Paschalis, S., Petri, M., Macchiavelli, A. O., Hen, O., & Piasetzky, E. Nucleon-nucleon correlations and the single-particle strength in atomic nuclei. Netherlands. doi:10.1016/j.physletb.2019.135110.
Paschalis, S., Petri, M., Macchiavelli, A. O., Hen, O., and Piasetzky, E. Wed . "Nucleon-nucleon correlations and the single-particle strength in atomic nuclei". Netherlands. doi:10.1016/j.physletb.2019.135110.
@article{osti_1575805,
title = {Nucleon-nucleon correlations and the single-particle strength in atomic nuclei},
author = {Paschalis, S. and Petri, M. and Macchiavelli, A. O. and Hen, O. and Piasetzky, E.},
abstractNote = {We propose a phenomenological approach to examine the role of short- and long-range nucleon-nucleon correlations in the quenching of single-particle strength in atomic nuclei and their evolution in asymmetric nuclei and neutron matter. These correlations are thought to be the reason for the quenching of spectroscopic factors observed in (e,e'p), (p,2p) and transfer reactions. We show that the recently observed increase of the high-momentum component of the protons in neutron-rich nuclei is consistent with the reduced proton spectroscopic factors. Our approach connects recent results on short-range correlations from high-energy electron scattering experiments with the quenching of spectroscopic factors and addresses for the first time quantitatively this intriguing question in nuclear physics, in particular regarding its isospin dependence. We also speculate about the nature of a quasi-proton (nuclear polaron) in neutron matter and its kinetic energy, an important quantity for the properties of neutron stars.},
doi = {10.1016/j.physletb.2019.135110},
journal = {Physics Letters B},
number = C,
volume = 800,
place = {Netherlands},
year = {2020},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2019.135110

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