Prospects of $Z'$ Portal Dark Matter in $U(1)_{L_μ-L_τ}$
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866929676710051840 |
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| author | Wang, Zhen-Wei Han, Zhi-Long Huang, Fei Jin, Yi Li, Honglei |
| author_facet | Wang, Zhen-Wei Han, Zhi-Long Huang, Fei Jin, Yi Li, Honglei |
| contents | The gauged $U(1)_{L_μ-L_τ}$ model is well-motivated to explain the muon $g-2$ anomaly and dark matter in previous studies. However, the latest NA64$μ$ experiment has almost excluded all the parameter space for the muon $g-2$, which indicates that the light dark matter benchmark scenarios interpreting muon $g-2$ in previous studies are also not allowed at present. In light of many recent and future experimental results, we revisit the minimal $Z'$ portal dark matter in $U(1)_{L_μ-L_τ}$. Focus on the phenomenology of dark matter $χ$, we first explore the viable parameter space for the light dark matter under various tight constraints. Around the $Z'$ resonance, we find that there is still a large parameter space for $m_χ\gtrsim10$ MeV via thermal freeze-out. On the other hand, the constraints on $Z'$ above the electroweak scale are quite loose but are less studied for dark matter. We also investigate the heavy dark matter around the TeV scale and corresponding constraints. A large part of the parameter space for dark matter is within the reach of future experiments. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2501_08622 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Prospects of $Z'$ Portal Dark Matter in $U(1)_{L_μ-L_τ}$ Wang, Zhen-Wei Han, Zhi-Long Huang, Fei Jin, Yi Li, Honglei High Energy Physics - Phenomenology The gauged $U(1)_{L_μ-L_τ}$ model is well-motivated to explain the muon $g-2$ anomaly and dark matter in previous studies. However, the latest NA64$μ$ experiment has almost excluded all the parameter space for the muon $g-2$, which indicates that the light dark matter benchmark scenarios interpreting muon $g-2$ in previous studies are also not allowed at present. In light of many recent and future experimental results, we revisit the minimal $Z'$ portal dark matter in $U(1)_{L_μ-L_τ}$. Focus on the phenomenology of dark matter $χ$, we first explore the viable parameter space for the light dark matter under various tight constraints. Around the $Z'$ resonance, we find that there is still a large parameter space for $m_χ\gtrsim10$ MeV via thermal freeze-out. On the other hand, the constraints on $Z'$ above the electroweak scale are quite loose but are less studied for dark matter. We also investigate the heavy dark matter around the TeV scale and corresponding constraints. A large part of the parameter space for dark matter is within the reach of future experiments. |
| title | Prospects of $Z'$ Portal Dark Matter in $U(1)_{L_μ-L_τ}$ |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2501.08622 |