通过补偿等曲率微扰复兴阿弗莱克 - 迪恩暴胀子情景
Reviving the Affleck-Dine Curvaton Scenario with Compensated Isocurvature Perturbations
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中文总结 AI 辅助
研究在超对称框架下的阿弗莱克 - 迪恩暴胀子情景，提出通过反相关暗物质等曲率微扰抵消相关重子等曲率微扰的机制，实现补偿等曲率微扰，能同时解释宇宙重子不对称性和观测到的曲率微扰，且不产生过大物质等曲率微扰。
中文摘要 AI 辅助
我们在超对称框架下重新审视阿弗莱克 - 迪恩暴胀子情景，并考虑Q球形成。在此情景中，携带重子数的标量场即阿弗莱克 - 迪恩场产生宇宙的曲率微扰和重子不对称性。然而，会不可避免地产生相关的重子等曲率微扰，导致相关物质等曲率微扰过大。我们提出一种抑制机制，通过反相关暗物质等曲率微扰抵消相关重子等曲率微扰，实现补偿等曲率微扰。我们表明该情景能同时解释宇宙的重子不对称性和观测到的曲率微扰，且不会产生过大的物质等曲率微扰。
英文摘要
We revisit the Affleck-Dine curvaton scenario in the framework of supersymmetry, taking Q-ball formation into account. In this scenario, a scalar field carrying baryon number, namely the Affleck-Dine field, generates both the curvature perturbations and the baryon asymmetry of the Universe. However, correlated baryon isocurvature perturbations are inevitably generated, resulting in excessively large correlated matter isocurvature perturbations. We propose a mechanism to suppress them, in which the correlated baryon isocurvature perturbations are canceled by anti-correlated dark matter isocurvature perturbations, thereby realizing compensated isocurvature perturbations. We show that the scenario can simultaneously account for the baryon asymmetry and the observed curvature perturbations of the Universe without generating excessively large matter isocurvature perturbations.
