Superallowed 0+→0+ nuclear β decays: 2020 critical survey, with implications for Vud and CKM unitarity

Superallowed 0+→0+ nuclear β decays: 2020 critical survey, with implications for Vud and CKM unitarity
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超级允许的 0+→0+ 核 β 衰变:2020 年关键调查,对 Vud 和 CKM 幺正性的影响

DOI:
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发表时间:
2020
期刊:
影响因子:
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通讯作者:
I. Towner
I. Towner
中科院分区:
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文献类型:
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作者:
J. Hardy;I. Towner

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超级允许的同位旋 1 和自旋宇称 ${0}^{+}$ 核模拟态之间的 $ensuremath{eta}$ 衰变提供了对电弱相互作用性质的基本测试。通过精确测量 15 个此类转变,数据共同探测弱矢量电流的守恒,对超出标准模型标量电流的存在设置严格限制,并产生 ${V}_{uphantom{ CKM 夸克混合矩阵的 ule{0}{0ex}}d}$ 元素。 ${V}_{幻影{ ule{0}{0ex}}d}$ 是测试该矩阵的幺正性所需的关键成分。这项工作对相关核物理输入进行了深入回顾,并将这些数据与基本耦合联系起来。
Superallowed $ensuremath{eta}$-decay between nuclear analog states with isospin 1 and spin-parity ${0}^{+}$ offers access to fundamental tests of the properties of the electroweak interaction. With 15 such transitions precisely measured, the data collectively probe the conservation of the weak vector current, set tight limits on the presence of beyond-standard-model scalar currents, and yield the most precise value for the ${V}_{uphantom{ ule{0}{0ex}}d}$ element of the CKM quark-mixing matrix. ${V}_{uphantom{ ule{0}{0ex}}d}$ is a critical ingredient required to test the unitarity of that matrix. This work provides an in-depth review of the relevant nuclear physics input and connects these data to the fundamental couplings.
DOI: 10.1103/physrevd.98.030001
发表时间: 2018-08
期刊: Physical Review D
影响因子: 5
作者:
K. Nakamura;K. Hagiwara;K. Hikasa;H. Murayama;M. Tanabashi;T. Watari;C. Amsler;M. Antonelli
通讯作者: K. Nakamura;K. Hagiwara;K. Hikasa;H. Murayama;M. Tanabashi;T. Watari;C. Amsler;M. Antonelli