Prospects for the detection of dark matter with long-lived mediators in the Sun using the Southern Wide-field Gamma-ray Observatory

Author(s)

Andrade, Micael ; Fagiani, Juan ; Siqueira, Clarissa ; de Souza, Vitor ; Viana, Aion

• Document type: Journal article
• Source: Journal of Cosmology and Astroparticle Physics; v. N/A, n. 1, p. 16-pg., 2025-01-01.

Abstract

The operation of the next generation of gamma-ray observatories will lead to a great advance in dark matter searches. In this paper, we use the hidden sectors hypothesis within the so-called secluded models to calculate the capabilities of the Southern Wide-field Gamma-ray Observatory (SWGO) to detect gamma-ray signatures produced by dark matter particles concentrated in the Sun. We assume the dark matter particle annihilates into metastable mediators which decay into gamma gamma , e + e - , tau + tau - , and b <overline> b outside the Sun. We found that the SWGO will be able to probe a spin-dependent cross-section of about 10 - 46 cm2 for dark matter masses smaller than 5 TeV. This result shows an unprecedented sensitivity surpassing the current instruments by more than one order of magnitude. (AU)

• FAPESP's process: 23/15494-0 - Optimization of Indirect Dark Matter Searches with Ground-based Gamma-Ray Observatories
• Grantee: Micael Jonathan Duarte Andrade
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 20/00320-9 - Searching for dark matter in light of CTA (Cherenkov Telescope Array)
• Grantee: Clarissa Martins Siqueira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 21/01089-1 - Cherenkov Telescope Array: construction and first discoveries
• Grantee: Luiz Vitor de Souza Filho
• Support Opportunities: Special Projects
• FAPESP's process: 19/14893-3 - Extreme phenomena of the Galactic Center and indirect searches of dark matter with gamma rays
• Grantee: Aion da Escóssia Melo Viana
• Support Opportunities: Research Grants - Young Investigators Grants