Sensitivity of the Cherenkov Telescope Array to a dark matter signal from the Galactic centre

A. Acharyya, R. Adam, O. Martínez, et al.

Journal of Cosmology and Astroparticle Physics Vol. 2021, nº. 1, pp. 1 - 64

Resumen:

We provide an updated assessment of the power of the Cherenkov Telescope Array (CTA) to search for thermally produced dark matter at the TeV scale, via the associated gamma-ray signal from pair-annihilating dark matter particles in the region around the Galactic centre. We find that CTA will open a new window of discovery potential, significantly extending the range of robustly testable models given a standard cuspy profile of the dark matter density distribution. Importantly, even for a cored profile, the projected sensitivity of CTA will be sufficient to probe various well-motivated models of thermally produced dark matter at the TeV scale. This is due to CTA's unprecedented sensitivity, angular and energy resolutions, and the planned observational strategy. The survey of the inner Galaxy will cover a much larger region than corresponding previous observational campaigns with imaging atmospheric Cherenkov telescopes. CTA will map with unprecedented precision the large-scale diffuse emission in high-energy gamma rays, constituting a background for dark matter searches for which we adopt state-of-the-art models based on current data. Throughout our analysis, we use up-to-date event reconstruction Monte Carlo tools developed by the CTA consortium, and pay special attention to quantifying the level of instrumental systematic uncertainties, as well as background template systematic errors, required to probe thermally produced dark matter at these energies.

Palabras Clave: dark matter experiments, dark matter theory, gamma ray experiments, galaxy morphology

Índice de impacto JCR y cuartil WoS: 7,280 - Q1 (2021); 6,400 - Q1 (2022)

Referencia DOI: https://doi.org/10.1088/1475-7516/2021/01/057

Publicado en papel: Enero 2021.

Publicado on-line: Enero 2021.

Cita:
A. Acharyya, R. Adam, O. Martínez, et al., Sensitivity of the Cherenkov Telescope Array to a dark matter signal from the Galactic centre. Journal of Cosmology and Astroparticle Physics. Vol. 2021, nº. 1, pp. 1 - 64, Enero 2021. [Online: Enero 2021]