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arXiv 0901.0081nucl-ex
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~(114)In衰变的β不对称参数

Beta asymmetry parameter in the decay of 114In

F. Wauters, V. De Leebeeck, I. Kraev, M. Tandecki, E. Traykov, S. Van Gorp, N. Severijns, D. Zakoucky

摘要:

本文报道了114 In纯Gamow-Teller衰变的β不对称参数A。低温核取向方法与基于GEANT 4的模拟代码相结合,首次详细讨论了散射和磁场的影响。结果A = -0.994 +/- 0.010stat +/- 0.010syst,构成了迄今为止核β跃迁的不对称参数的最准确值。该值与标准模型预测的A = -1一致,并提供了张量型带电弱电流的新限制。

英文摘要:

The beta asymmetry parameter A for the pure Gamow-Teller decay of 114In is reported. The low temperature nuclear orientation method was combined with a GEANT4 based simulation code allowing for the first time to address in detail the effects of scattering and of the magnetic field. The result, A = -0.994 +/- 0.010stat +/- 0.010syst, constitutes the most accurate value for the asymmetry parameter of a nuclear beta transition to date. The value is in agreement with the Standard Model prediction of A = -1 and provides new limits on tensor type charged weak currents.

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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