Cavan-Piton Maël, Guadagnoli Diego, Oertel Micaela, Seong Hyeonseok, Vittorio Ludovico
<a href="https://ror.org/010hz2d37">LAPTh</a>, <a href="https://ror.org/04gqg1a07">Université Savoie Mont-Blanc</a> et <a href="https://ror.org/02feahw73">CNRS</a>, 74941 Annecy, France.
<a href="https://ror.org/00bbtde36">Laboratoire Univers et Théories</a>, <a href="https://ror.org/029nkcm90">Observatoire de Paris</a>, <a href="https://ror.org/013cjyk83">Université PSL</a>, <a href="https://ror.org/02feahw73">CNRS</a>, <a href="https://ror.org/05f82e368">Université de Paris-Cité</a>, 92190 Meudon, France.
Phys Rev Lett. 2024 Sep 20;133(12):121002. doi: 10.1103/PhysRevLett.133.121002.
The duration of the neutrino burst from the supernova event SN 1987A is known to be sensitive to exotic sources of cooling, such as axions radiated from the dense and hot hadronic matter thought to constitute the inner core of the supernova. We perform the first quantitative study of the role of hadronic matter beyond the first generation--in particular strange matter. We do so by consistently including the full baryon and meson octets, and computing axion emissivity induced from baryon-meson to baryon-axion scatterings as well as from baryon decays. We consider a range of supernova thermodynamic conditions, as well as equation-of-state models with different strangeness content. We obtain the first bound on the axial axion-strange-strange coupling, as well as the strongest existing bound on the axion-down-strange counterpart. Our bound on the latter coupling can be as small as O(10^{-2}) for f_{a}=10^{9} GeV.
超新星事件SN 1987A中微子爆发的持续时间已知对诸如从被认为构成超新星内核的致密热强子物质辐射出的轴子等奇特冷却源敏感。我们首次对第一代以外的强子物质——特别是奇异物质的作用进行了定量研究。我们通过始终包含完整的重子和介子八重态，并计算从重子 - 介子到重子 - 轴子散射以及重子衰变产生的轴子发射率来做到这一点。我们考虑了一系列超新星热力学条件以及具有不同奇异含量的状态方程模型。我们得到了轴矢轴子 - 奇异 - 奇异耦合的首个限制，以及轴子 - 下 - 奇异对应耦合的最强现有限制。对于(f_{a}=10^{9},\text{GeV})，我们对后一种耦合的限制可小至(O(10^{-2}))。
