Comprehensive Constraints on ALP Couplings from future $e^+e^-$ Colliders, Muon $g-2$, Thermal Dark Matter and Higgs Measurements
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| Format: | Preprint |
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2025
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| _version_ | 1866910265289736192 |
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| author | Sharma, Pramod Singh, Soham Kumar, Mukesh Goyal, Ashok |
| author_facet | Sharma, Pramod Singh, Soham Kumar, Mukesh Goyal, Ashok |
| contents | In this article, we present projected 95\% C.L. limits on Axion-Like Particle (ALP) couplings from ALP production at a future $e^+e^-$ collider operating at $\sqrt{s} = 250~\text{GeV}$ with integrated luminosity $L = 0.5~\text{ab}^{-1}$. We constrain the effective couplings $g_{γγ}$, $g_{Zγ}$, $g_{ZZ}$, and $g_{WW}$ over the ALP mass range $20~\text{GeV} \leq m_a \leq 100~\text{GeV}$, finding projected bounds at the level of $\mathcal{O}(10^{-1})~\text{TeV}^{-1}$ for $g_{γγ}/f_a$. Given that the latest muon anomalous magnetic moment measurement ($Δa_μ$) shows no statistically significant deviation from the Standard Model prediction, we reinterpret the ALP contributions to $Δa_μ$ as a stringent consistency requirement. We then derive the corresponding allowed regions for $g_{γγ}$ and the ALP--muon coupling $C_{μμ}$, and apply them to a fermionic dark matter scenario in which the relic density depends on both the dark matter mass $m_χ$ and $m_a$. The same parameter space is further constrained by Higgs signal strength measurements through $h \to γγ$ and $h \to Zγ$. A comparative analysis with existing experimental and theoretical bounds highlights the complementarity of $Δa_μ$, dark matter, and Higgs observables in restricting ALP couplings, demonstrating that even in the absence of a $Δa_μ$ anomaly, these constraints provide essential guidance for viable ALP parameter space. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2505_12466 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Comprehensive Constraints on ALP Couplings from future $e^+e^-$ Colliders, Muon $g-2$, Thermal Dark Matter and Higgs Measurements Sharma, Pramod Singh, Soham Kumar, Mukesh Goyal, Ashok High Energy Physics - Phenomenology In this article, we present projected 95\% C.L. limits on Axion-Like Particle (ALP) couplings from ALP production at a future $e^+e^-$ collider operating at $\sqrt{s} = 250~\text{GeV}$ with integrated luminosity $L = 0.5~\text{ab}^{-1}$. We constrain the effective couplings $g_{γγ}$, $g_{Zγ}$, $g_{ZZ}$, and $g_{WW}$ over the ALP mass range $20~\text{GeV} \leq m_a \leq 100~\text{GeV}$, finding projected bounds at the level of $\mathcal{O}(10^{-1})~\text{TeV}^{-1}$ for $g_{γγ}/f_a$. Given that the latest muon anomalous magnetic moment measurement ($Δa_μ$) shows no statistically significant deviation from the Standard Model prediction, we reinterpret the ALP contributions to $Δa_μ$ as a stringent consistency requirement. We then derive the corresponding allowed regions for $g_{γγ}$ and the ALP--muon coupling $C_{μμ}$, and apply them to a fermionic dark matter scenario in which the relic density depends on both the dark matter mass $m_χ$ and $m_a$. The same parameter space is further constrained by Higgs signal strength measurements through $h \to γγ$ and $h \to Zγ$. A comparative analysis with existing experimental and theoretical bounds highlights the complementarity of $Δa_μ$, dark matter, and Higgs observables in restricting ALP couplings, demonstrating that even in the absence of a $Δa_μ$ anomaly, these constraints provide essential guidance for viable ALP parameter space. |
| title | Comprehensive Constraints on ALP Couplings from future $e^+e^-$ Colliders, Muon $g-2$, Thermal Dark Matter and Higgs Measurements |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2505.12466 |