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arXiv 1901.01022hep-ph
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平面电磁波作用下物质中Dirac中微子的自旋味振荡

Spin-flavor oscillations of Dirac neutrinos in matter under the influence of a plane electromagnetic wave

Maxim Dvornikov

摘要:

研究了狄拉克中微子在背景物质和平面电磁波中的振荡。首先,我们得到了在圆极化平面电磁波作用下,具有反常磁矩的大质量中微子与物质发生电弱相互作用的Dirac-Pauli方程的新的精确解。我们用这个结果来描述中微子在外场中的自旋振荡。然后,我们考虑了几种中微子味,并研究了该系统中的中微子自旋味振荡。为此,我们制定的初始条件问题,并解决它考虑外部领域。本文导出了不同类型中微子磁矩自旋味振荡跃迁几率的解析表达式。这些解析表达式与有效薛定谔方程的数值解和其他作者的研究结果进行了比较。特别是,我们揭示了中微子自旋味振荡在所考虑的外部领域的共振不可能发生与以前的索赔。最后,我们简要讨论了一些可能的天体物理应用。

英文摘要:

We study oscillations of Dirac neutrinos in background matter and a plane electromagnetic wave. First, we find the new exact solution of the Dirac-Pauli equation for a massive neutrino with the anomalous magnetic moment electroweakly interacting with matter under the influence of a plane electromagnetic wave with the circular polarization. We use this result to describe neutrino spin oscillations in the external fields in question. Then we consider several neutrino flavors and study neutrino spin-flavor oscillations in this system. For this purpose we formulate the initial condition problem and solve it accounting for the considered external fields. We derive the analytical expressions for the transition probabilities of spin-flavor oscillations for different types of neutrino magnetic moments. These analytical expressions are compared with the numerical solutions of the effective Schrödinger equation and with the findings of other authors. In particular, we reveal that a resonance in neutrino spin-flavor oscillations in the considered external fields cannot happen contrary to the previous claims. Finally, we briefly discuss some possible astrophysical applications.

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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