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arXiv 2502.08027nucl-thhep-phnucl-ex
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高能核碰撞中$0νββ$衰变核矩阵元的基准测试

Benchmarking nuclear matrix elements of $0νββ$ decay with high-energy nuclear collisions

Yi Li, Xin Zhang, Giuliano Giacalone, Jiangming Yao

AI总结:

本研究通过高能核碰撞中的动量关联与集体流测量,为无中微子双β衰变核矩阵元提供新的基准测试平台,以降低其理论不确定性。

摘要:

减少核矩阵元(NMEs)的不确定性仍然是设计和解释旨在发现无中微子双β($0νββ$)衰变的实验中的关键挑战。在此,我们确定了一类与低能核结构应用中使用的观测量不同的观测量,这些观测量与NMEs强相关:高能核碰撞中产生的强子之间的动量关联。聚焦于$^{150}$Nd→$^{150}$Sm跃迁,我们将$^{150}$Nd结构的贝叶斯分析与高能$^{150}$Nd+$^{150}$Nd碰撞的模拟相结合。我们揭示了NMEs与这些过程中形成的夸克-胶子等离子体(QGP)的特征(如空间梯度和各向异性)之间的显著相关性,这些特征可通过集体流测量获得。我们的研究结果表明,涉及$0νββ$衰变候选核的碰撞实验可作为对NMEs理论预测进行基准测试的平台。

英文摘要:

Reducing uncertainties in the nuclear matrix elements (NMEs) remains a critical challenge in designing and interpreting experiments aimed at discovering neutrinoless double beta ($0νββ$) decay. Here, we identify a class of observables, distinct from those employed in low-energy nuclear structure applications, that are strongly correlated with the NMEs: momentum correlations among hadrons produced in high-energy nuclear collisions. Focusing on the $^{150}$Nd$\rightarrow$$^{150}$Sm transition, we combine a Bayesian analysis of the structure of $^{150}$Nd with simulations of high-energy $^{150}$Nd+$^{150}$Nd collisions. We reveal prominent correlations between the NMEs and features of the quark-gluon plasma (QGP) formed in these processes, such as spatial gradients and anisotropies, which are accessible via collective flow measurements. Our findings demonstrate collider experiments involving $0νββ$ decay candidates as a platform for benchmarking theoretical predictions of the NMEs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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