Constraining Neutrinoless Double-Beta Decay Matrix Elements from Ab Initio Nuclear Theory
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2022
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| _version_ | 1866916723892944896 |
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| author | Belley, A. Miyagi, T. Stroberg, S. R. Holt, J. D. |
| author_facet | Belley, A. Miyagi, T. Stroberg, S. R. Holt, J. D. |
| contents | As experimental searches for neutrinoless double-beta ($0νββ$) decay are entering a new generation, with hopes to completely probe the inverted mass hierarchy, the need for reliable nuclear matrix elements, which govern the rate of this decay, is stronger than ever. Since a large discrepancy in results is typically found with nuclear modela, a large unknown still exists on the sensitivity of these experiments to the effective neutrino mass. We consider this problem from a first-principles perspective, using the ab initio valence-space in medium similarity renormalization group. In particular, we study correlations of the $0νββ$-decay matrix elements in $^{76}$Ge with other observables, such as the double Gamow-Teller giant resonance, from 34 input chiral interactions in an attempt to constrain our uncertainties and investigate the interaction dependence of the nuclear matrix element. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2210_05809 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Constraining Neutrinoless Double-Beta Decay Matrix Elements from Ab Initio Nuclear Theory Belley, A. Miyagi, T. Stroberg, S. R. Holt, J. D. Nuclear Theory High Energy Physics - Phenomenology Nuclear Experiment As experimental searches for neutrinoless double-beta ($0νββ$) decay are entering a new generation, with hopes to completely probe the inverted mass hierarchy, the need for reliable nuclear matrix elements, which govern the rate of this decay, is stronger than ever. Since a large discrepancy in results is typically found with nuclear modela, a large unknown still exists on the sensitivity of these experiments to the effective neutrino mass. We consider this problem from a first-principles perspective, using the ab initio valence-space in medium similarity renormalization group. In particular, we study correlations of the $0νββ$-decay matrix elements in $^{76}$Ge with other observables, such as the double Gamow-Teller giant resonance, from 34 input chiral interactions in an attempt to constrain our uncertainties and investigate the interaction dependence of the nuclear matrix element. |
| title | Constraining Neutrinoless Double-Beta Decay Matrix Elements from Ab Initio Nuclear Theory |
| topic | Nuclear Theory High Energy Physics - Phenomenology Nuclear Experiment |
| url | https://arxiv.org/abs/2210.05809 |