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arXiv 1802.10097hep-phhep-latnucl-th
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对无中微子双β衰变的新贡献

A new leading contribution to neutrinoless double-beta decay

V. Cirigliano, W. Dekens, J. de Vries, M. L. Graesser, E. Mereghetti, S. Pastore, U. van Kolck

摘要:

在手征有效场论的框架下讨论了轻Majorana中微子对无中微子双β衰变跃迁算符的主要贡献。基于重正化参数在两个维度的正则化与最小减法和坐标空间截断计划,我们需要引入一个领先的顺序短程运营商,在所有目前的计算中失踪。我们讨论的策略,以确定短程耦合的有限部分匹配到格点量子色动力学或通过手征对称性与同位旋破缺的两个核子部门的可观的。最后,我们推测这一新的贡献的核基质元素的相关实验的影响。

英文摘要:

Within the framework of chiral effective field theory we discuss the leading contributions to the neutrinoless double-beta decay transition operator induced by light Majorana neutrinos. Based on renormalization arguments in both dimensional regularization with minimal subtraction and a coordinate-space cutoff scheme, we show the need to introduce a leading-order short-range operator, missing in all current calculations. We discuss strategies to determine the finite part of the short-range coupling by matching to lattice QCD or by relating it via chiral symmetry to isospin-breaking observables in the two-nucleon sector. Finally, we speculate on the impact of this new contribution on nuclear matrix elements of relevance to experiment.

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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