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arXiv 2407.15445hep-th
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SB SUSY Gauss-Bonnet暴胀中的原初黑洞

Primordial black holes in SB SUSY Gauss-Bonnet inflation

A. Ashrafzadeh, M. Solbi, S. Heydari, K. Karami

备注：
33 pages, 8 figures, 3 tables
发表信息：
JCAP 01 (2025) 025
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AI总结：

本文在耦合Gauss-Bonnet项的SB SUSY暴胀模型中，通过USR阶段增强曲率扰动，产生多质量窗口PBHs及可探测次级引力波，并契合LIGO-Virgo、OGLE与NANOGrav观测。

摘要：

在这里，我们探索耦合到Gauss-Bonnet（GB）项的标量场暴胀模型中原初黑洞（PBHs）的形成，该模型纳入了低能标自发破缺超对称（SB SUSY）势。耦合函数会放大曲率扰动，从而导致PBHs和可探测的次级引力波（GWs）的形成。通过调整模型参数，暴胀子可以在超慢滚（USR）阶段减速，从而增强曲率扰动。除观测约束外，我们还研究了沼泽地准则。我们的计算预测形成质量约为${\cal O}(10)M_{\odot}$的PBHs，这与LIGO-Virgo的观测数据相符；以及质量为${\cal O}(10^{-6})M_{\odot}$的PBHs，可作为OGLE数据所记录的超短时标微引力透镜事件的潜在解释。此外，我们提出的机制能够产生质量约为${\cal O}(10^{-13})M_{\odot}$的PBHs，约占暗物质的99$\\%$。所产生GWs的密度参数（$Ω_{\rm GW_0}$）与引力波探测器的灵敏度曲线相交。我们模型的两种情形处于纳赫兹频率范围。其中一种满足幂律标度$Ω_{\rm{GW}}(f) \sim f^{5-γ}$，其中$γ=3.51$，这与NANOGrav 15年数据一致。

英文摘要：

Here, we explore the formation of primordial black holes (PBHs) within a scalar field inflationary model coupled to the Gauss-Bonnet (GB) term, incorporating the low-scale spontaneously broken supersymmetric (SB SUSY) potential. The coupling function amplifies the curvature perturbations, consequently leading to the formation of PBHs and detectable secondary gravitational waves (GWs). Through the adjustment of the model parameters, the inflaton can be decelerated during an ultra-slow-roll (USR) phase, thereby augmenting curvature perturbations. Beside the observational constraints, the swampland criteria are investigated. Our computations forecast the formation of PBHs with masses around ${\cal O}(10)M_{\odot}$, aligning with the observational data of LIGO-Virgo, and PBHs with masses ${\cal O}(10^{-6})M_{\odot}$ as potential explanation for the ultrashort-timescale microlensing events recorded in the OGLE data. Additionally, our proposed mechanism can generate PBHs with masses around ${\cal O}(10^{-13})M_{\odot}$, constituting roughly 99$\%$ of the dark matter. The density parameters of the produced GWs ($Ω_{\rm GW_0}$) intersect with the sensitivity curves of GW detectors. Two cases of our model fall within the nano-Hz frequency regime. One of them satisfies the power-law scaling as $Ω_{\rm{GW}}(f) \sim f^{5-γ}$, with the $γ= 3.51$, which is consistent with the data of NANOGrav 15-year.

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。

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