Freeze-in Production of Non-Abelian Millicharged Vector Dark Matter
Fuente:
arXiv
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912755655639040 |
|---|---|
| author | Tran, Van Que Yuan, Tzu-Chiang |
| author_facet | Tran, Van Que Yuan, Tzu-Chiang |
| contents | We present the first predictive realization of vector freeze-in dark matter from a hidden non-Abelian gauge sector, spontaneously broken to a residual $U(1)$ with a massless dark photon mediator. A massive dark vector particle-antiparticle pair acquires small millicharges via a dimension-five kinetic mixing operator that induces a dimension-four mixing term with effective coefficient $ε$, and interacts through the hidden gauge coupling $g_D$, linking it weakly to the Standard Model. Solving the relic abundance with a two-temperature Boltzmann evolution including plasmon decays, we find that $ε, g_D \sim 10^{-7}$ reproduce the observed density while satisfying astrophysical and cosmological bounds. This minimal framework links non-Abelian vector dynamics, long-range dark forces, and dark matter, and can be testable with upcoming sub-GeV dark matter direct-detection experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_08622 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Freeze-in Production of Non-Abelian Millicharged Vector Dark Matter Tran, Van Que Yuan, Tzu-Chiang High Energy Physics - Phenomenology We present the first predictive realization of vector freeze-in dark matter from a hidden non-Abelian gauge sector, spontaneously broken to a residual $U(1)$ with a massless dark photon mediator. A massive dark vector particle-antiparticle pair acquires small millicharges via a dimension-five kinetic mixing operator that induces a dimension-four mixing term with effective coefficient $ε$, and interacts through the hidden gauge coupling $g_D$, linking it weakly to the Standard Model. Solving the relic abundance with a two-temperature Boltzmann evolution including plasmon decays, we find that $ε, g_D \sim 10^{-7}$ reproduce the observed density while satisfying astrophysical and cosmological bounds. This minimal framework links non-Abelian vector dynamics, long-range dark forces, and dark matter, and can be testable with upcoming sub-GeV dark matter direct-detection experiments. |
| title | Freeze-in Production of Non-Abelian Millicharged Vector Dark Matter |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2512.08622 |