13ª Semana Integrada do Instituto de Física de São Carlos

Searching for heavy dark matter with gamma-rays

21 de ago. de 2023 16:00

1h 30m

Salão de Eventos USP

Prêmio YPM 16h00 - 17h30

Descrição

One of the most intriguing problems in particle physics and cosmology nowadays is the called dark matter problem. We have several evidences, like galaxy rotation curves, galaxy cluster collision, baryon acoustic oscillation, structure formation, among others, implying that we need a new particle, beyond the standard model of particle physics (SM), to explain the major matter component of the universe and to address all these evidences. The attempts to discover the DM particle could be via collider, direct (DD) and indirect (ID) detection searches. In the ID scenario DM may self-annihilate on stable SM particles, such as neutrinos, cosmic-rays and gamma-rays, which can be detected by experiments on Earth. (1) A viable model for DM particle must predict the observed abundance as a thermal relic of the early universe (in the WIMP paradigm through a freeze-out mechanism). Indirect detection searches restrict the parameter space $\left< \sigma \, v \right> \times m_{DM}$ and are complementary to relic abundance and direct detection limits. In this work we study the phenomenology of a specific model of DM particle (the inert doublet model) and we evaluate the sensitivity of gamma-ray observatories (like CTA) to detect a signal in the Galactic Center (GC) region. (2)

Referências

1 LEFRANC, V.; MOULIN, E.; PANCI, P.; SILK, J. Prospects for annihilating dark matter in the inner galactic halo by the cherenkov telescope array. Physical Review D, v. 91, n. 12, p. 122003-1-122003-14, 2015.

2 FABIAN, S.; GOERTZ, F.; JIANG, Y. Dark matter and nature of electroweak phase transition with an inert doublet. Journal of Cosmology and Astroparticle Physics, v. 2021, n. 11, p. 011-1-011-18, 2021.