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arXiv 1104.2837hep-ph
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核介质中的中微子振荡

Neutrino oscillations in nuclear media

Iman Motie, She-Sheng Xue

摘要:

基于带电轻子流和强子流的有效相互作用,我们得到了中微子在核介质中的有效相互作用哈密顿量。利用这个有效哈密顿量,我们研究了核介质和强磁场中的中微子混合和振荡。计算了中微子混合角和质量平方差,发现真空中微子振荡的模式在磁化核介质中发生了改变。通过与真空中微子振荡的比较,我们发现对于高能中微子,核介质的存在抑制了中微子振荡。在中性核介质中有电子存在的一般情况下,计算了混合角和质量平方差,讨论了中微子振荡中的共振和能级交叉。

英文摘要:

On basis of effective interactions of charged lepton and hadron currents, we obtain an effective interacting Hamiltonian of neutrinos in nuclear media up to the leading order. Using this effective Hamiltonian, we study neutrino mixing and oscillations in nuclear media and strong magnetic fields. We compute neutrino mixing angle and mass squared difference, and find the pattern of vacuum neutrino oscillations is modified in magnetized nuclear media. Comparing with the vacuum neutrino oscillation, we find that for high-energy neutrinos, neutrino oscillations are suppressed in the presence of nuclear media. In the general case of neutral nuclear media with the presence of electrons, we calculate the mixing angle and mass squared difference, and discuss the resonance and level-crossing in neutrino oscillations.

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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