Universality of nucleon short-range behavior with chiral forces
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866917151878676480 |
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| author | Sun, Xiang-Xiang Le, Hoai Meißner, Ulf-G. Nogga, Andreas |
| author_facet | Sun, Xiang-Xiang Le, Hoai Meißner, Ulf-G. Nogga, Andreas |
| contents | Modern advanced nuclear ab initio approaches with the similarity renormalization group (SRG) softened interactions miss high-momentum information, thus rendering them less suitable for characterizing nucleon-nucleon short-range physics. We introduce a novel framework to construct SRG-independent nuclear wave functions from No-Core Shell Model calculations. Applying our method to densities obtained with semilocal momentum-space-regularized chiral NN and NNN forces, we show key universalities of short-range behavior: (1) The two-body density ratio in the np S=1 channel, relative to the deuteron (d), is remarkably insensitive to interaction details. (2) More strikingly, while the ratio of total two-body densities to the deuteron exhibits cutoff dependence, the same ratio to the $α$-particle (4-He) is almost independent of the interactions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_15454 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Universality of nucleon short-range behavior with chiral forces Sun, Xiang-Xiang Le, Hoai Meißner, Ulf-G. Nogga, Andreas Nuclear Theory Modern advanced nuclear ab initio approaches with the similarity renormalization group (SRG) softened interactions miss high-momentum information, thus rendering them less suitable for characterizing nucleon-nucleon short-range physics. We introduce a novel framework to construct SRG-independent nuclear wave functions from No-Core Shell Model calculations. Applying our method to densities obtained with semilocal momentum-space-regularized chiral NN and NNN forces, we show key universalities of short-range behavior: (1) The two-body density ratio in the np S=1 channel, relative to the deuteron (d), is remarkably insensitive to interaction details. (2) More strikingly, while the ratio of total two-body densities to the deuteron exhibits cutoff dependence, the same ratio to the $α$-particle (4-He) is almost independent of the interactions. |
| title | Universality of nucleon short-range behavior with chiral forces |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2512.15454 |