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 ($\sin^2 2 \theta > 10^{-10}$). 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.

中文翻译：

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提升 keV 质量无菌中微子的核心坍缩超新星边界

我们探索了超新星核心中电子和具有 keV 质量的无菌中微子混合引起的能量和熵传输以及轻子数变化。我们开发了一种对无菌电子中微子混合的径向和时间相关的处理方法，包括普通物质效应、无菌和电子反中微子之间的再转换，以及首次碰撞产生无菌粒子。由于无菌粒子的产生对核心的组成和热力学特性的动态反馈仅对大混合角的超新星物理学产生重大影响（$\sin^2 2 \theta > 10^{-10}$） .