arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2604.26005hep-phastro-ph.CO
收藏

小行星质量原初黑洞作为超对称标准模型中的暗物质

Asteroid-mass Primordial Black Holes as Dark Matter from Supersymmetry

Scuola Superiore Meridionale(南方高等学院);INFN - Sezione di Napoli(意大利国家核物理研究所那不勒斯分部)

Andrea Boccia, Marco Chianese

AI总结:

研究超对称标准模型中重粒子对宇宙方程状态的短暂软化,增强原初黑洞形成,发现超对称质量高于10^5 GeV时,小行星质量范围的原初黑洞质量函数显著增强,可解释暗物质而不违反现有约束。

摘要:

我们研究了原初黑洞作为暗物质候选者的形成,特别是在超对称标准模型的扩展中。我们展示,超对称标准模型中预测的重粒子的存在,可以在其非相对论性过渡期间使宇宙方程状态的软化暂时增强,从而促进原初黑洞的形成。我们计算了不同超对称标准模型质量谱实现的有效方程状态,参数化为三个特征质量尺度。假设广谱且近标度不变的原始曲率功率谱,我们评估了由此产生的原初黑洞质量函数,并将其与当前观测约束进行比较。我们发现,对于超对称质量高于约10^5 GeV的情况,原初黑洞质量函数在小行星质量窗口显著增强,允许原初黑洞解释总暗物质丰度而不违反现有约束。相比之下,在标准模型中,相同配置导致的原初黑洞质量函数被观测排除。对于较轻的超对称质量谱,原初黑洞的产生被移向约10^22 g的质量范围,该范围受到微透镜搜索的强烈限制,从而减少了其对暗物质密度的允许贡献。

英文摘要:

We study the formation of asteroid-mass Primordial Black Holes (PBHs) as a dark matter candidate in supersymmetric extensions of the Standard Model. We show that the presence of heavy particles predicted in the Minimal Supersymmetric Standard Model (MSSM) can lead to a transient softening of the equation of state of the Universe during their non-relativistic transition, enhancing PBH formation. We compute the effective equation of state for different realizations of the MSSM mass spectrum, parametrized by three characteristic mass scales. Assuming a broad and approximately scale-invariant primordial curvature power spectrum, we evaluate the resulting PBH mass functions and compare them with current observational constraints. We find that, for supersymmetric masses above $\sim 10^5\,\mathrm{GeV}$, the PBH mass function is significantly enhanced in the asteroid-mass window, allowing PBHs to account for the total dark matter abundance without violating existing bounds. In contrast, within the Standard Model the same configurations lead to PBH mass functions that are observationally excluded. For lighter supersymmetric mass spectra, PBH production is shifted toward masses above $\sim 10^{22}\,\mathrm{g}$, which are strongly constrained by microlensing searches, thereby reducing their allowed contribution to the dark matter density.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑