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arXiv 1809.09074hep-ph
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晚期超新星中微子信号与原中子星半径

Late time supernova neutrino signal and proto-neutron star radius

A. Gallo Rosso, S. Abbar, F. Vissani, M. C. Volpe

摘要:

讨论了利用晚时中微子信号重建新形成的原中子星半径的可能性。一个黑体辐射被假定为中子星冷却阶段。我们参数化的中微子时间积分通量的基础上模拟的罗伯茨和雷迪。在三味和一种有效的味道的情况下,在超神冈的逆β衰变和弹性散射事件的似然分析。我们表明,在半径重建中实现的精度在很大程度上取决于与捏参数的相关性,因此相应的先验。虽然这种相关性阻碍了新形成的中子星半径的精确测量,但鉴于当前对中子星半径的限制,或者如果精确测量中子星半径,它可以帮助测量具有良好精度的箍缩参数。

英文摘要:

We discuss the possibility of reconstructing the newly formed proto-neutron star radius from the late time neutrino signal. A black-body emission is assumed for the neutron star cooling phase. We parametrize the neutrino time-integrated fluxes based on simulations of Roberts and Reddy. A likelihood analysis of the inverse-beta decay and elastic scattering events in Hyper-Kamiokande is performed in both three flavor and an effective one flavor scenario. We show that the precision achievable in the radius reconstruction strongly depends on a correlation with the pinching parameter and therefore the corresponding prior. Although this correlation hinders the precise measurement of the newly formed neutron star radius, it could help measure the pinching parameters with good accuracy in view of the current constraints on neutron star radius, or if the neutron star radius is precisely measured.

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