论文标题

基准测试$^{136} $ XE NEDINOLESS $ββ$ decay矩阵元素用$^{138} {\ rm ba}(p,p,t)$反应

Benchmarking $^{136}$Xe Neutrinoless $ββ$ Decay Matrix Element Calculations with the $^{138}{\rm Ba}(p,t)$ Reaction

论文作者

Rebeiro, B. M., Triambak, S., Garrett, P. E., Brown, B. A., Ball, G. C., Lindsay, R., Adsley, P., Bildstein, V., Burbadge, C., Varela, A. Diaz, Faestermann, T., Fang, D. L., Hertenberger, R., Horoi, M., Jigmeddorj, B., Kamil, M., Leach, K. G., Mabika, P. Z., Ondze, J. C. Nzobadila, Orce, J. N., Wirth, H. -F.

论文摘要

我们使用高分辨率的磁光谱仪研究了通过$^{138} {\ rm ba}(p,t)$反应生产的$^{136} $ ba中的中子对$ 0^+$状态。结合最新的壳模型计算,这些数据基准部分是$^{136} $ XE中准ledbleta Beta($0νββ$)衰减的核矩阵元件(NME)的主要gamow-Teller组件。我们首次通过使用可观察的实验性观察途径对$0νβ$衰减NME的一部分进行评估,并提供了一种新的方法途径,以更准确地计算$0νβ$衰减矩阵元素。

We used a high-resolution magnetic spectrograph to study neutron pair-correlated $0^+$ states in $^{136}$Ba, produced via the $^{138}{\rm Ba}(p,t)$ reaction. In conjunction with state-of-the-art shell model calculations, these data benchmark part of the dominant Gamow-Teller component of the nuclear matrix element (NME) for $^{136}$Xe neutrinoless double beta ($0νββ$) decay. We demonstrate for the first time an evaluation of part of a $0νββ$ decay NME by use of an experimental observable, presenting a new avenue of approach for more accurate calculations of $0νββ$ decay matrix elements.

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