Probing conversion-driven freeze-out at the LHC

Autor(es)

Heisig, Jan ; Lessa, Andre ; Ramos, Lucas Magno D.

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW D; v. 110, n. 1, p. 14-pg., 2024-07-30.

Resumo

Conversion-driven freeze-out is an appealing mechanism to explain the observed relic density while naturally accommodating the null results from direct and indirect detection due to a very weak dark matter coupling. Interestingly, the scenario predicts long-lived particles decaying into dark matter with lifetimes favorably coinciding with the range that can be resolved at the LHC. However, the small mass splitting between the long-lived particle and dark matter renders the visible decay products soft, thus challenging current search strategies. We consider four different classes of searches covering the entire range of lifetimes: heavy stable charge particles, disappearing tracks, displaced vertices, and missing energy searches. We discuss the applicability of these searches to conversion-driven freeze-out and derive current constraints highlighting their complementarity. For the displaced vertex search, we demonstrate how a slight modification of the current analysis significantly improves its sensitivity to the scenario. (AU)

• 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
• Processo FAPESP: 18/25225-9 - Centro de Pesquisa e Análise de São Paulo
• Beneficiário: Sergio Ferraz Novaes
• Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais