تقرير
Impact of clustering on the $^8$Li $\beta$ decay and recoil form factors
| العنوان: | Impact of clustering on the $^8$Li $\beta$ decay and recoil form factors |
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| المؤلفون: | Sargsyan, G. H., Launey, K. D., Burkey, M. T., Gallant, A. T., Scielzo, N. D., Savard, G., Mercenne, A., Dytrych, T., Langr, D., Varriano, L., Longfellow, B., Hirsh, T. Y., Draayer, J. P. |
| المصدر: | Phys. Rev. Lett. 128, 202503 (2022) |
| سنة النشر: | 2021 |
| المجموعة: | Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Theory, Nuclear Experiment |
| الوصف: | We place unprecedented constraints on recoil corrections in the $\beta$ decay of $^8$Li, by identifying a strong correlation between them and the $^8$Li ground state quadrupole moment in large-scale ab initio calculations. The results are essential for improving the sensitivity of high-precision experiments that probe the weak interaction theory and test physics beyond the Standard Model (BSM). In addition, our calculations predict a $2^+$ state of the $\alpha+\alpha$ system that is energetically accessible to $\beta$ decay but has not been observed in the experimental $^8$Be energy spectrum, and has an important effect on the recoil corrections and $\beta$ decay for the $A=8$ systems. This state and an associated $0^+$ state are notoriously difficult to model due to their cluster structure and collective correlations, but become feasible for calculations in the ab initio symmetry-adapted no-core shell-model framework. Comment: Accepted version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.128.202503 |
| URL الوصول: | http://arxiv.org/abs/2107.10389 |
| رقم الأكسشن: | edsarx.2107.10389 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.128.202503 |
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