Light Thermal Dark Matter Beyond $p$-Wave Annihilation in Minimal Higgs Portal Model
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866929365260959744 |
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| author | Chen, Yu-Tong Matsumoto, Shigeki Tang, Tian-Peng Tsai, Yue-Lin Sming Wu, Lei |
| author_facet | Chen, Yu-Tong Matsumoto, Shigeki Tang, Tian-Peng Tsai, Yue-Lin Sming Wu, Lei |
| contents | This study explores a minimal renormalizable dark matter (DM) model, incorporating a sub-GeV Majorana DM and a singlet scalar particle $ϕ$. Using scalar and pseudo-scalar interactions (couplings $c_s$ and $c_p$), we investigate implications for DM detection, considering $s$-wave, $p$-wave, and combined ($s$+$p$ wave) contributions in DM annihilation cross-section, as well as loop-correction contributions to DM-nucleon elastic scattering. Identifying a broad parameter space ($10 \,\rm{MeV} < m_χ\lesssim m_ϕ$) within the $2σ$ allowed region, we explore scenarios ($\left|c_s\right|\gg \left|c_p\right|$, $\left|c_s\right|\ll \left|c_p\right|$, and $\left|c_s\right|\approx \left|c_p\right|$). We find that (i) a non-zero pseudo-scalar coupling alleviates direct detection constraints as a comparison with the previous pure scalar coupling case; (ii) CMB observations set stringent limits on pseudo-scalar interaction dominant cases, making $s$-wave annihilation viable only for $m_χ>1\,\rm{GeV}$; (iii) the preferred $ϕ$-resonance region can be tested in the future indirect detection experiments, such as e-ASTROGAM. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_02721 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Light Thermal Dark Matter Beyond $p$-Wave Annihilation in Minimal Higgs Portal Model Chen, Yu-Tong Matsumoto, Shigeki Tang, Tian-Peng Tsai, Yue-Lin Sming Wu, Lei High Energy Physics - Phenomenology High Energy Astrophysical Phenomena This study explores a minimal renormalizable dark matter (DM) model, incorporating a sub-GeV Majorana DM and a singlet scalar particle $ϕ$. Using scalar and pseudo-scalar interactions (couplings $c_s$ and $c_p$), we investigate implications for DM detection, considering $s$-wave, $p$-wave, and combined ($s$+$p$ wave) contributions in DM annihilation cross-section, as well as loop-correction contributions to DM-nucleon elastic scattering. Identifying a broad parameter space ($10 \,\rm{MeV} < m_χ\lesssim m_ϕ$) within the $2σ$ allowed region, we explore scenarios ($\left|c_s\right|\gg \left|c_p\right|$, $\left|c_s\right|\ll \left|c_p\right|$, and $\left|c_s\right|\approx \left|c_p\right|$). We find that (i) a non-zero pseudo-scalar coupling alleviates direct detection constraints as a comparison with the previous pure scalar coupling case; (ii) CMB observations set stringent limits on pseudo-scalar interaction dominant cases, making $s$-wave annihilation viable only for $m_χ>1\,\rm{GeV}$; (iii) the preferred $ϕ$-resonance region can be tested in the future indirect detection experiments, such as e-ASTROGAM. |
| title | Light Thermal Dark Matter Beyond $p$-Wave Annihilation in Minimal Higgs Portal Model |
| topic | High Energy Physics - Phenomenology High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2403.02721 |