论文标题
低能超新星严重限制了辐射粒子衰变
Low-Energy Supernovae Severely Constrain Radiative Particle Decays
论文作者
论文摘要
在巨大恒星倒塌中形成的热核是假设虚弱的粒子的强大来源，例如无菌中微子，深色光子，轴突状颗粒（ALP）等。辐射衰减，例如$ a \to2γ$，如果平均自由路径小于祖细胞恒星的半径，则将这种能量沉积在周围的材料中。我们首次使用具有特别低爆炸能量的超新星（SN）种群作为最敏感的量热仪来限制这种可能性。这些SNE在观察上被识别为低流射速度和低质量的$^{56} $ Ni的低亮度事件。它们的低能将粒子衰减的能量沉积限制为小于约0.1 b，其中$ 1〜 {\ rm b〜（bethe）} = 10^{51}〜{\ rm erg} $。对于1-500 MEV-MAS ALPS，此通用参数不包括$ 10^{ - 10} $ -10} $ - $ 10^{ - 8}〜{\ rm gev}^{\ rm Gev}^{ - 1} $ range。
The hot and dense core formed in the collapse of a massive star is a powerful source of hypothetical feebly-interacting particles such as sterile neutrinos, dark photons, axion-like particles (ALPs), and others. Radiative decays such as $a\to2γ$ deposit this energy in the surrounding material if the mean free path is less than the radius of the progenitor star. For the first time, we use a supernova (SN) population with particularly low explosion energies as the most sensitive calorimeters to constrain this possibility. These SNe are observationally identified as low-luminosity events with low ejecta velocities and low masses of ejected $^{56}$Ni. Their low energies limit the energy deposition from particle decays to less than about 0.1 B, where $1~{\rm B~(bethe)}=10^{51}~{\rm erg}$. For 1-500 MeV-mass ALPs, this generic argument excludes ALP-photon couplings $G_{aγγ}$ in the $10^{-10}$-$10^{-8}~{\rm GeV}^{-1}$ range.
