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arXiv 2207.04516hep-phastro-ph.SRhep-ex
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太阳$\barν_e$通量:中微子磁矩和太阳磁场的重新讨论

Solar $\barν_e$ flux: Revisiting bounds on neutrino magnetic moments and solar magnetic field

Evgeny Akhmedov, Pablo Martínez-Miravé

摘要:

中微子跃迁磁偶极矩与磁场的相互作用可以引起中微子自旋味旋进现象。对于马约拉纳中微子,太阳中微子的SFP和味振荡的联合作用将表现为来自太阳的电子反中微子的小通量,但可能是可检测的。没有观测到这样的通量,就限制了中微子磁矩$μ$和太阳磁场$B$强度的乘积。我们推导出一个简单的分析表达式的预期$\barν_e$出现概率在三味框架,我们用它来重新审视现有的实验界$μB$。为了验证分析结果的正确性,进行了数值计算.我们还提出了我们的数值计算结果的能量分箱的形式,方便的数据分析的当前和未来的实验寻找太阳$\barν_e$通量。此外,我们给出了一个全面的汇编其他现有的限制中微子磁矩和探测的有效磁矩的基本中微子磁矩和轻子混合参数的表达式。

英文摘要:

The interaction of neutrino transition magnetic dipole moments with magnetic fields can give rise to the phenomenon of neutrino spin-flavour precession (SFP). For Majorana neutrinos, the combined action of SFP of solar neutrinos and flavour oscillations would manifest itself as a small, yet potentially detectable, flux of electron antineutrinos coming from the Sun. Non-observation of such a flux constrains the product of the neutrino magnetic moment $μ$ and the strength of the solar magnetic field $B$. We derive a simple analytical expression for the expected $\barν_e$ appearance probability in the three-flavour framework and we use it to revisit the existing experimental bounds on $μB$. A full numerical calculation has also been performed to check the validity of the analytical result. We also present our numerical results in energy-binned form, convenient for analyses of the data of the current and future experiments searching for the solar $\barν_e$ flux. In addition, we give a comprehensive compilation of other existing limits on neutrino magnetic moments and of the expressions for the probed effective magnetic moments in terms of the fundamental neutrino magnetic moments and leptonic mixing parameters.

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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