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arXiv 0908.4297hep-ph
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外磁场中的中微子自能

Neutrino self-energy in external magnetic field

Andrea Erdas

摘要:

利用精确传播子,在恒定磁场中,计算了具有大质量Dirac中微子的Weinberg-Salam模型的最小扩展范围内,在磁场强度B的所有量级上的中微子自能.得到了一个简单而精确的自能公式,它适用于0 < B << m^2_W/e和中微子对磁场p_{\perp} << m_W的横动量.讨论了这一发现对真空和电荷对称介质中无质量中微子的色散以及超新星和磁星中大质量中微子在磁场诱导下的共振跃迁的影响,并计算了中微子的磁矩。

英文摘要:

Using the exact propagators in a constant magnetic field, the neutrino self-energy has been calculated to all orders in the field strength B within the minimal extension of the Weinberg-Salam model with massive Dirac neutrinos. A simple and very accurate formula for the self-energy is obtained, that is valid for 0 < B << m^2_W/e and for and for neutrino transverse momentum to the magnetic field p_{\perp} << m_W. I discuss the implications of this finding to the dispersion of massless neutrinos in vacuum and in a charge-symmetric medium, and to the magnetic field induced resonance transitions of massive neutrinos inside supernovae and magnetars, and calculate the neutrino magnetic moment.

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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