Constraining Gamma-ray Lines from Dark Matter Annihilation using Fermi-LAT and H.E.S.S. data
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| Format: | Preprint |
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2023
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| _version_ | 1866908870854574080 |
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| author | Angel, Lucia Gambini, Guillermo Guedes, Leticia Queiroz, Farinaldo S. de Souza, Vitor |
| author_facet | Angel, Lucia Gambini, Guillermo Guedes, Leticia Queiroz, Farinaldo S. de Souza, Vitor |
| contents | Using 14 years of Fermi-LAT data and 10 years of H.E.S.S. observations in the direction of the galactic center, we derive limits on gamma-ray lines originated from dark matter annihilations for fermionic and scalar fields. We describe the dark matter annihilation into $γγ$ or $γZ$ final states in terms of effective operators and place limits on the energy scale as a function of the dark matter mass taking into account the energy resolution of the instruments. For the Fermi-LAT data, we considered an NFW and a contracted NFW dark matter density profile, the latter being preferred by the Fermi GeV excess. For the H.E.S.S. observation, we used an NFW and Einasto profile. Fermi-LAT yields the most stringent constraints for dark matter masses below 300 GeV, whereas H.E.S.S. has the strongest ones for dark matter masses above 1 TeV. The telescopes share similar sensitivities for dark matter masses between 300 GeV and 1 TeV. We conclude that Fermi-LAT (H.E.S.S.) can probe energy scales up to $10(20)$~TeV for scalar and fermionic dark matter particles. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2311_17827 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Constraining Gamma-ray Lines from Dark Matter Annihilation using Fermi-LAT and H.E.S.S. data Angel, Lucia Gambini, Guillermo Guedes, Leticia Queiroz, Farinaldo S. de Souza, Vitor High Energy Physics - Phenomenology Using 14 years of Fermi-LAT data and 10 years of H.E.S.S. observations in the direction of the galactic center, we derive limits on gamma-ray lines originated from dark matter annihilations for fermionic and scalar fields. We describe the dark matter annihilation into $γγ$ or $γZ$ final states in terms of effective operators and place limits on the energy scale as a function of the dark matter mass taking into account the energy resolution of the instruments. For the Fermi-LAT data, we considered an NFW and a contracted NFW dark matter density profile, the latter being preferred by the Fermi GeV excess. For the H.E.S.S. observation, we used an NFW and Einasto profile. Fermi-LAT yields the most stringent constraints for dark matter masses below 300 GeV, whereas H.E.S.S. has the strongest ones for dark matter masses above 1 TeV. The telescopes share similar sensitivities for dark matter masses between 300 GeV and 1 TeV. We conclude that Fermi-LAT (H.E.S.S.) can probe energy scales up to $10(20)$~TeV for scalar and fermionic dark matter particles. |
| title | Constraining Gamma-ray Lines from Dark Matter Annihilation using Fermi-LAT and H.E.S.S. data |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2311.17827 |