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arXiv 0911.1771astro-ph.COhep-ph
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衰变中微子:通往各向同性的漫长道路

Decaying neutrinos: The long way to isotropy

Anders Basboll, Ole Eggers Bjaelde

摘要:

我们调查的情况下,中微子耦合到一个赝标度的自由$\ph$和衰变$ν_1 \to ν_2+\ph$和逆衰变是负责获得平衡的机制。在这方面,我们讨论了不可见中微子衰变对中微子-赝标耦合常数和中微子寿命的影响。假设中微子和赝标量的热背景的现实情况下,我们更新的(非对角)中微子赝标量耦合常数的约束$g<2.6\times10^{-13}$和中微子寿命的约束$τ<1\times10^{13}\,\rm{s}$。此外,我们确认分析动力学平衡延迟两个洛伦兹$\ga$ -因素-一个时间膨胀的(衰减)中微子寿命和一个从开放的角度。我们还在数值上证实了这种行为。

英文摘要:

We investigate a scenario in which neutrinos are coupled to a pseudoscalar degree of freedom $\ph$ and where decays $ν_1 \to ν_2+\ph$ and inverse decays are the responsible mechanism for obtaining equilibrium. In this context we discuss the implication of the invisible neutrino decay on the neutrino-pseudoscalar coupling constant and the neutrino lifetime. Assuming the realistic scenario of a thermal background of neutrinos and pseudoscalar we update the bound on the (off-diagonal) neutrino-pseudoscalar coupling constant to $g<2.6\times10^{-13}$ and the bound on the neutrino lifetime to $τ<1\times10^{13}\,\rm{s}$. Furthermore we confirm analytically that kinetic equilibrium is delayed by two Lorentz $\ga$--factors -- one for time dilation of the (decaying) neutrino lifetime and one from the opening angle. We have also confirmed this behavior numerically.

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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