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arXiv 2004.11389astro-ph.HEhep-ph
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提升keV-mass无菌中微子的核心坍缩超新星边界

Lifting the core-collapse supernova bounds on keV-mass sterile neutrinos

Anna M. Suliga, Irene Tamborra, Meng-Ru Wu

摘要:

我们探讨了超新星核心中电子与keV质量的无菌中微子混合引起的能量和熵输运以及轻子数的变化。我们开发了一个径向和时间依赖的治疗的无菌电子中微子混合,包括普通物质的影响,无菌和电子反中微子之间的再转换,以及碰撞生产的无菌粒子的第一次。由于无菌粒子的生产对核心的组成和热力学性质的动力学反馈只会导致大混合角超新星物理学($\sin^2 2 θ> 10^{-10}$)的重大影响。我们的研究结果表明,在超新星核心的电子无菌转换物理学的自洽评估将放松的界限上的无菌中微子混合参数在文献中报道的混合角小于$10^{-6}$,留下的参数空间的质量和混合角的无菌中微子相关的暗物质搜索不受超新星的约束。

英文摘要:

We explore the energy and entropy transport as well as the lepton number variation induced from the mixing between electron and sterile neutrinos with keV mass in the supernova core. We develop a radial- and time-dependent treatment of the sterile-electron neutrino mixing, by including ordinary matter effects, reconversions between sterile and electron antineutrinos, as well as the collisional production of sterile particles for the first time. The dynamical feedback due to the production of sterile particles on the composition and thermodynamic properties of the core only leads to major implications for the supernova physics for large mixing angles ($\sin^2 2 θ> 10^{-10}$). Our findings suggest that a self-consistent appraisal of the electron-sterile conversion physics in the supernova core would relax the bounds on the sterile neutrino mixing parameters reported in the literature for mixing angles smaller than $10^{-6}$, leaving the parameter space of the mass and mixing angles of sterile neutrinos relevant to dark matter searches unconstrained by supernovae.

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