Autor(es)

Reis, Igor ; Moulin, Emmanuel ; Viana, Aion ; Goncalves, Victor P.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Cosmology and Astroparticle Physics; v. N/A, n. 7, p. 23-pg., 2024-07-01.

Resumo

Huge efforts have been deployed to detect dark matter (DM) in the GeV-TeV mass range involving various detection techniques, and led to strong constraints in the available parameter space. We compute here the sensitivity to sub-GeV DM that can be probed from the inevitable cosmic-ray scattering onto DM particles populating the Milky Way halo. Inelastic scattering of energetic cosmic rays off DM would produce high-energy gamma rays in the final state, providing a new avenue to probe the poorly-constrained so far sub-GeV dark matter mass range. In this work we derive sensitivity forecasts for the inelastic cosmic-ray proton-DM cross section for current and future very-high-energy gamma-ray observatories such as H.E.S.S., LHAASO, CTA and SWGO in the 100 eV to 100 MeV mass range. These inelastic cross section constraints are converted to the elastic proton-DM cross section to highlight further complementarity with cosmological, collider and direct detection searches. The sensitivity computed at 95% confidence level on the elastic cross section reaches ,,, 2 x 10 - 32 cm 2 for a 100 keV DM mass for H.E.S.S.-like and ,,, 7 x 10 - 34 cm 2 for a ,,, 1 keV DM mass for LHAASO. The sensitivity prospects for CTA and a strawman SWGO model reach ,,, 6 x 10 - 34 cm 2 and ,,, 4 x 10 - 35 cm 2 , for DM masses of 10 keV and 1 keV, respectively. The sensitivity reach of the gamma-ray observatories considered here enables to probe an uncharted region of the DM mass-cross section parameter space. (AU)

• Processo FAPESP: 19/14893-3 - Fenômenos extremos no Centro Galáctico e busca indireta de matéria escura com raios gama
• Beneficiário: Aion da Escóssia Melo Viana
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 21/02027-0 - Estudo do Centro Galáctico e busca de sinais de matéria escura com raios gama
• Beneficiário: Igor Reis
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 21/01089-1 - Cherenkov Telescope Array: construção e primeiras descobertas
• Beneficiário: Luiz Vitor de Souza Filho
• Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais