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Title: The nuclear contacts and short range correlations in nuclei

Abstract

Atomic nuclei are complex strongly interacting systems and their exact theoretical description is a long-standing challenge. An approximate description of nuclei can be achieved by separating its short and long range structure. This separation of scales stands at the heart of the nuclear shell model and effective field theories that describe the long-range structure of the nucleus using a mean-field approximation. We present here an effective description of the complementary short-range structure using contact terms and stylized two-body asymptotic wave functions. The possibility to extract the nuclear contacts from experimental data is presented. Regions in the two-body momentum distribution dominated by high-momentum, close-proximity, nucleon pairs are identified and compared to experimental data. The amount of short-range correlated (SRC) nucleon pairs is determined and compared to measurements. Non-combinatorial isospin symmetry for SRC pairs is identified. The obtained one-body momentum distributions indicate dominance of SRC pairs above the nuclear Fermi-momentum.

Authors:
 [1];  [2];  [1];  [3]; ORCiD logo [2]
  1. Hebrew Univ. of Jerusalem (Israel)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. Tel Aviv Univ., Ramat Aviv (Israel)
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1499372
Grant/Contract Number:  
FG02-94ER40818
Resource Type:
Accepted Manuscript
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 780; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Weiss, R., Cruz-Torres, R., Barnea, N., Piasetzky, E., and Hen, O. The nuclear contacts and short range correlations in nuclei. United States: N. p., 2018. Web. doi:10.1016/j.physletb.2018.01.061.
Weiss, R., Cruz-Torres, R., Barnea, N., Piasetzky, E., & Hen, O. The nuclear contacts and short range correlations in nuclei. United States. doi:10.1016/j.physletb.2018.01.061.
Weiss, R., Cruz-Torres, R., Barnea, N., Piasetzky, E., and Hen, O. Wed . "The nuclear contacts and short range correlations in nuclei". United States. doi:10.1016/j.physletb.2018.01.061. https://www.osti.gov/servlets/purl/1499372.
@article{osti_1499372,
title = {The nuclear contacts and short range correlations in nuclei},
author = {Weiss, R. and Cruz-Torres, R. and Barnea, N. and Piasetzky, E. and Hen, O.},
abstractNote = {Atomic nuclei are complex strongly interacting systems and their exact theoretical description is a long-standing challenge. An approximate description of nuclei can be achieved by separating its short and long range structure. This separation of scales stands at the heart of the nuclear shell model and effective field theories that describe the long-range structure of the nucleus using a mean-field approximation. We present here an effective description of the complementary short-range structure using contact terms and stylized two-body asymptotic wave functions. The possibility to extract the nuclear contacts from experimental data is presented. Regions in the two-body momentum distribution dominated by high-momentum, close-proximity, nucleon pairs are identified and compared to experimental data. The amount of short-range correlated (SRC) nucleon pairs is determined and compared to measurements. Non-combinatorial isospin symmetry for SRC pairs is identified. The obtained one-body momentum distributions indicate dominance of SRC pairs above the nuclear Fermi-momentum.},
doi = {10.1016/j.physletb.2018.01.061},
journal = {Physics Letters. Section B},
number = C,
volume = 780,
place = {United States},
year = {2018},
month = {2}
}

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Cited by: 12 works
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Figures / Tables:

Fig. 1. Fig. 1.: The ratio of proton–proton to proton–neutron SRC pairs in 4He as a function of the pair momentum extracted from 4He(e,e’pN) measurements [47]. The colored lines show the equivalent ab-initio two-body momentum densities ratio integrated over the c.m. momentum from 0 to $K$max that varies from zero to infinitymore » [16]. The solid (dashed) black line is the contact theory prediction calculated using the contacts extracted in momentum (coordinate) space (Eq. (7)). (For interpretation of the colors in the figure(s), the reader is referred to the web version of this article.)« less

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