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arXiv · 2201.03344

Constraining branon dark matter from observations of the Segue 1 dwarf spheroidal galaxy with the MAGIC telescopes

Tjark Miener·Daniel Nieto·Viviana Gammaldi·Daniel Kerszberg·Javier Rico
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Abstract

We present the first search for signatures of brane-world extra-dimensional dark matter (DM) in the very-high-energy gamma-ray band by scrutinizing observations of the dwarf spheroidal galaxy Segue 1 with the Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescope system. Branons are new degrees of freedom that appear within flexible brane-world models: they are weakly interacting massive particles and natural DM candidates. The ground-based gamma-ray telescopes MAGIC could indirectly detect branon DM in the multi-TeV mass range by observing secondary products of DM annihilation into Standard Model particles. In the absence of a signal, we place constraints on the branon DM parameter space by using a binned likelihood analysis of almost 160-hours deep exposure on the Segue 1 dwarf spheroidal galaxy by the MAGIC telescopes. Our most stringent limit to the thermally-averaged annihilation cross-section (at $95\%$ confidence level) corresponds to $ \langle \sigma v \rangle \simeq 1.4 \times 10^{-23}~\text{cm}^{3}\text{s}^{-1} $ at a branon mass of $ \sim 0.7~\text{TeV}$.

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Tjark Miener, Daniel Nieto, Viviana Gammaldi, Daniel Kerszberg, Javier Rico. 2022-01-10. Constraining branon dark matter from observations of the Segue 1 dwarf spheroidal galaxy with the MAGIC telescopes. https://doi.org/10.1088/1475-7516/2022/05/005

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