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arXiv 2106.02181hep-phastro-ph.HE
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稠密物质中强磁场引起的中微子-反中微子振荡

Neutrino-antineutrino oscillations induced by strong magnetic fields in dense matter

Hirokazu Sasaki, Tomoya Takiwaki

摘要:

我们模拟了致密物质中强磁场引起的中微子-反中微子振荡。在强磁场和大的中微子磁矩作用下,Majorana中微子可以达到味平衡.我们发现中微子-反中微子振荡的味平衡对物质内部的重子密度和电子分数是敏感的。在重子密度较大的情况下,丰中子(质子)物质中的中微子-反中微子振荡被抑制。另一方面,当电子分数接近$0.5$时,即使在大的重子密度下也会发生味平衡。通过模拟,我们提出了稠密物质中中微子-反中微子振荡平衡的一个必要条件。我们还利用中微子流体动力学模拟核塌缩超新星的结果研究了在原中子星附近是否满足这个必要条件。在我们的爆炸模型中,如果原中子星表面的磁场大于磁星磁场的典型值$10^{14}$ G,味平衡是可能的。

英文摘要:

We simulate neutrino-antineutrino oscillations caused by strong magnetic fields in dense matter. With the strong magnetic fields and large neutrino magnetic moments, Majorana neutrinos can reach flavor equilibrium. We find that the flavor equilibration of neutrino-antineutrino oscillations is sensitive to the values of the baryon density and the electron fraction inside the matter. The neutrino-antineutrino oscillations are suppressed in the case of the large baryon density in neutron (proton)-rich matter. On the other hand, the flavor equilibration occurs when the electron fraction is close to $0.5$ even in the large baryon density. From the simulations, we propose a necessary condition for the equilibration of neutrino-antineutrino oscillations in dense matter. We also study whether such necessary condition is satisfied near the proto-neutron star by using results of neutrino hydrodynamic simulations of core-collapse supernovae. In our explosion model, the flavor equilibration would be possible if the magnetic field on the surface of the proto-neutron star is larger than $10^{14}$ G which is the typical value of the magnetic fields of magnetars.

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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