Constraining Gravitational Dark Matter with LHAASO and Fermi-LAT
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| Format: | Preprint |
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2025
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| _version_ | 1866908704812564480 |
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| author | Barman, Basabendu Das, Arindam Sarmah, Prantik SivaKumar, Rakesh Kumar |
| author_facet | Barman, Basabendu Das, Arindam Sarmah, Prantik SivaKumar, Rakesh Kumar |
| contents | We use diffuse Galactic high energy gamma ray data from LHAASO and Fermi-LAT to constrain gravitationally produced decaying dark matter (DM). Focusing on four benchmark candidates: a dark photon, a heavy right-handed neutrino (RHN), a pseudo-Nambu-Goldstone boson (pNGB), and a non-minimally coupled scalar we derive bounds on the DM mass and its couplings to the visible sector. For dark photons, RHNs, and pNGBs, the combined data constrain the relevant interaction strength to $\lesssim\mathcal{O}(10^{-30})$ for DM masses $\gtrsim\mathcal{O}$(TeV), while the non-minimally coupled scalar is limited to $\lesssim\mathcal{O}(10^{-10})$. Moreover, photon-dark photon oscillations yield strong constraints for massive dark photon beyond 10 GeV, closing a region of parameter space previously left unconstrained. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2512_09997 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Constraining Gravitational Dark Matter with LHAASO and Fermi-LAT Barman, Basabendu Das, Arindam Sarmah, Prantik SivaKumar, Rakesh Kumar High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics We use diffuse Galactic high energy gamma ray data from LHAASO and Fermi-LAT to constrain gravitationally produced decaying dark matter (DM). Focusing on four benchmark candidates: a dark photon, a heavy right-handed neutrino (RHN), a pseudo-Nambu-Goldstone boson (pNGB), and a non-minimally coupled scalar we derive bounds on the DM mass and its couplings to the visible sector. For dark photons, RHNs, and pNGBs, the combined data constrain the relevant interaction strength to $\lesssim\mathcal{O}(10^{-30})$ for DM masses $\gtrsim\mathcal{O}$(TeV), while the non-minimally coupled scalar is limited to $\lesssim\mathcal{O}(10^{-10})$. Moreover, photon-dark photon oscillations yield strong constraints for massive dark photon beyond 10 GeV, closing a region of parameter space previously left unconstrained. |
| title | Constraining Gravitational Dark Matter with LHAASO and Fermi-LAT |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2512.09997 |