Raman stimulated neutrino pair emission
Raman stimulated neutrino pair emission
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DOI：
10.1140/epjc/s10052-019-7148-y
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发表时间：
2019-04
期刊：
影响因子：
--
通讯作者：
H. Hara;M. Yoshimura
中科院分区：
文献类型：
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作者：
H. Hara;M. Yoshimura
本文提出了一种利用宏观相干性实验确定中微子质量矩阵的新方案，特别是中微子质量的绝对值，以及质量类型，Majorana或Dirac。提出的过程是一个集体的，相干的拉曼散射，随后是中微子对发射，从长寿命到;由六个大质量的中微子对组成。计算的角分布具有六个（ij）阈值，其显示为不同角度处的阶跃。角分布的阈值和事件率的角位置使得有可能通过实验确定最小的中微子质量小于几个meV的水平，（因此所有三个质量使用中微子振荡数据），质量排序模式，正常或倒置，并区分中微子是Majorana还是Dirac类型。当宏观相干放大机制起作用时，通过仔细选择某些类型的靶，中微子对发射的事件率可以变得足够大，以用于实际实验。要克服的问题是当两个额外的光子逃脱检测时，宏观相干放大过程的量子电动力学背景。我们使用中性的三价和三价Ho离子掺杂在电介质晶体中来说明我们的想法。
A new scheme using macroscopic coherence is proposed to experimentally determine the neutrino mass matrix, in particular the absolute value of neutrino masses, and the mass type, Majorana or Dirac. The proposed process is a collective, coherent Raman scattering followed by neutrino-pair emission fromof a long lifetime to;withconsisting of six massive neutrino-pairs. Calculated angular distribution has six (ij) thresholds which show up as steps at different angles. Angular locations of thresholds and event rates of the angular distribution make it possible to experimentally determine the smallest neutrino mass to the level of less than several meV, (accordingly all three masses using neutrino oscillation data), the mass ordering pattern, normal or inverted, and to distinguish whether neutrinos are of Majorana or Dirac type. Event rates of neutrino-pair emission, when the mechanism of macroscopic coherence amplification works, may become large enough for realistic experiments by carefully selecting certain types of target. The problem to be overcome is macro-coherently amplified quantum electrodynamic background of the process,, when two extra photons,, escape detection. We illustrate our idea using neutral Xe and trivalent Ho ion doped in dielectric crystals.