Stylized features of single-nucleon momentum distributions
- Author
- Jan Ryckebusch (UGent) , Maarten Vanhalst (UGent) and Wim Cosyn (UGent)
- Organization
- Project
- Abstract
- Nuclear short-range correlations (SRC) typically manifest themselves in the tail parts of the single-nucleon momentum distributions. We propose an approximate practical method for computing those SRC contributions to the high-momentum parts. The framework adopted in this work is applicable throughout the nuclear mass table and corrects mean-field models for central, spin–isospin and tensor correlations by shifting the complexity induced by the SRC from the wave functions to the operators. It is argued that the expansion of these modified operators can be truncated to a low order. The proposed model can generate the SRC-related high-momentum tail of the single-nucleon momentum distribution. These are dominated by correlation operators acting on mean-field pairs with vanishing relative radial and angular-momentum quantum numbers. The proposed method explains the dominant role of proton–neutron pairs in generating the SRC and accounts for the magnitude and mass dependence of SRC as probed in inclusive electron scattering. It also provides predictions for the ratio of the amount of correlated proton–proton to proton–neutron pairs which are in line with the observations. In asymmetric nuclei, the correlations make the average kinetic energy for the minority nucleons larger than for the majority nucleons.
- Keywords
- nuclear reactions, electron scattering, nuclear short-range correlations, CORRELATION OPERATOR METHOD, SHORT-RANGE CORRELATIONS, GROUND-STATE, MATTER, O-16(E
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-5896271
- MLA
- Ryckebusch, Jan, et al. “Stylized Features of Single-Nucleon Momentum Distributions.” JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, vol. 42, no. 5, 2015, doi:10.1088/0954-3899/42/5/055104.
- APA
- Ryckebusch, J., Vanhalst, M., & Cosyn, W. (2015). Stylized features of single-nucleon momentum distributions. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 42(5). https://doi.org/10.1088/0954-3899/42/5/055104
- Chicago author-date
- Ryckebusch, Jan, Maarten Vanhalst, and Wim Cosyn. 2015. “Stylized Features of Single-Nucleon Momentum Distributions.” JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS 42 (5). https://doi.org/10.1088/0954-3899/42/5/055104.
- Chicago author-date (all authors)
- Ryckebusch, Jan, Maarten Vanhalst, and Wim Cosyn. 2015. “Stylized Features of Single-Nucleon Momentum Distributions.” JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS 42 (5). doi:10.1088/0954-3899/42/5/055104.
- Vancouver
- 1.Ryckebusch J, Vanhalst M, Cosyn W. Stylized features of single-nucleon momentum distributions. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS. 2015;42(5).
- IEEE
- [1]J. Ryckebusch, M. Vanhalst, and W. Cosyn, “Stylized features of single-nucleon momentum distributions,” JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, vol. 42, no. 5, 2015.
@article{5896271, abstract = {{Nuclear short-range correlations (SRC) typically manifest themselves in the tail parts of the single-nucleon momentum distributions. We propose an approximate practical method for computing those SRC contributions to the high-momentum parts. The framework adopted in this work is applicable throughout the nuclear mass table and corrects mean-field models for central, spin–isospin and tensor correlations by shifting the complexity induced by the SRC from the wave functions to the operators. It is argued that the expansion of these modified operators can be truncated to a low order. The proposed model can generate the SRC-related high-momentum tail of the single-nucleon momentum distribution. These are dominated by correlation operators acting on mean-field pairs with vanishing relative radial and angular-momentum quantum numbers. The proposed method explains the dominant role of proton–neutron pairs in generating the SRC and accounts for the magnitude and mass dependence of SRC as probed in inclusive electron scattering. It also provides predictions for the ratio of the amount of correlated proton–proton to proton–neutron pairs which are in line with the observations. In asymmetric nuclei, the correlations make the average kinetic energy for the minority nucleons larger than for the majority nucleons.}}, articleno = {{055104}}, author = {{Ryckebusch, Jan and Vanhalst, Maarten and Cosyn, Wim}}, issn = {{0954-3899}}, journal = {{JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS}}, keywords = {{nuclear reactions,electron scattering,nuclear short-range correlations,CORRELATION OPERATOR METHOD,SHORT-RANGE CORRELATIONS,GROUND-STATE,MATTER,O-16(E}}, language = {{eng}}, number = {{5}}, pages = {{17}}, title = {{Stylized features of single-nucleon momentum distributions}}, url = {{http://doi.org/10.1088/0954-3899/42/5/055104}}, volume = {{42}}, year = {{2015}}, }
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