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We propose a \(U(1)_D\) gauge symmetry framework supporting SIDM candidates interacting via a light mediator, leading to suppressed thermal relic abundance. To achieve the correct DM density, we consider non-thermal production from a long-lived scalar decay, which also generates dark radiation (DR) that may be tested by future CMB experiments. Additionally, the \( U(1)_D\) gauge boson, through kinetic mixing and dominant axial-vector coupling, may explain the electron \((g-2)\) anomaly.

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CMB Signature of Self-interacting Dark Matter

  • 会议论文

  • 发表日期：

    2025年

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  • Vicky Singh Thounaojam

摘要

We propose a \(U(1)_D\) gauge symmetry framework supporting SIDM candidates interacting via a light mediator, leading to suppressed thermal relic abundance. To achieve the correct DM density, we consider non-thermal production from a long-lived scalar decay, which also generates dark radiation (DR) that may be tested by future CMB experiments. Additionally, the \( U(1)_D\) gauge boson, through kinetic mixing and dominant axial-vector coupling, may explain the electron \((g-2)\) anomaly.