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arXiv · 2210.05957

A local-density-approximation description of high-momentum tails in isospin asymmetric nuclei

Xiao-Hua Fan·Zu-Xing Yang·Peng Yin·Peng-Hui Chen·Jian-Min Dong·Zhi-Pan Li·Haozhao Liang
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Abstract

We adapt the local density approximation to add the high-momentum tails (HMTs) to finite nuclei's Slater-determinant momentum distributions. The HMTs are extracted by the extended Brueckner-Hartree-Fock (EBHF) method or by the lowest order cluster approximation. With a correction factor being added to EBHF, it is sufficiently in agreement with the experimental benchmark, i.e., the high-momentum $N/Z$ ratios approximately equal to $1$, and the low-momentum $N/Z$ ratios approximately equal to $N/Z$ of the systems. It is also found that the tensor force makes the nucleon-nucleon correlations appear more easily on the nuclear surface region and the percentage of high-momentum ($p > 300$ MeV/c) nucleons, around $17\%$--$18\%$, independent of isospin asymmetry.

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Xiao-Hua Fan, Zu-Xing Yang, Peng Yin, Peng-Hui Chen, Jian-Min Dong, Zhi-Pan Li, Haozhao Liang. 2022-10-12. A local-density-approximation description of high-momentum tails in isospin asymmetric nuclei. https://doi.org/10.1016/j.physletb.2022.137482

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