发表机构
University of Iowa; Indian Institute of Technology Bombay（爱荷华大学; 印度理工学院孟买分校）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出利用弥散超新星中微子背景探测核心坍缩超新星中标量诱导的一阶相变，发现信号依赖中微子质量排序，现有数据已约束参数空间，未来探测器可显著提高灵敏度。
AI 中文摘要
我们研究了通过弥散超新星中微子背景（DSNB）探测核心坍缩超新星内部标量诱导的一阶相变（FOPT）的可能性。我们考虑一个与中微子耦合的轻标量，该标量在原型中子星核心中产生并热化。这导致两种不同的中微子成分：来自热产生标量的瞬发贡献，以及来自FOPT导致的相干标量激发衰变的延迟、谱窄贡献。我们研究了在超级神冈（Super-Kamiokande）、超级神冈升级版（Hyper-Kamiokande）和DUNE探测器上的DSNB信号，发现其强烈依赖于中微子质量排序。最近的超级神冈数据已经对倒序质量和准简并中微子质量情况下的标量参数空间施加了约束，而未来的探测器可以显著提高这一灵敏度。我们的结果表明，DSNB测量可以为核心坍缩超新星中的有限温度标量动力学提供一种新颖的探测手段。
英文摘要
We investigate the possibility of probing a scalar-induced first-order phase transition (FOPT) inside core-collapse supernovae through the diffuse supernova neutrino background (DSNB). We consider a light scalar coupled to neutrinos that is produced and thermalised in the proto-neutron-star core. This leads to two distinct neutrino components: a prompt contribution from thermally produced scalars and a delayed, spectrally narrow contribution from the decay of coherent scalar excitations due to the FOPT. We study the resulting DSNB signal at Super-Kamiokande, Hyper-Kamiokande, and DUNE, finding a strong dependence on the neutrino mass ordering. The recent Super-Kamiokande data already constrain the scalar parameter space for inverted ordering and quasi-degenerate neutrino masses, while future detectors can significantly improve this sensitivity. Our results demonstrate that DSNB measurements can provide a novel probe of finite-temperature scalar dynamics in core-collapse supernovae.
Comments24 pages, 5 figures
