Search for Gamma-Ray Spectral Lines from Dark Matter Annihilation up to 100 TeV toward the Galactic Center with MAGIC - INSPIRE

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Search for Gamma-Ray Spectral Lines from Dark Matter Annihilation up to 100 TeV toward the Galactic Center with MAGIC

MAGIC

Collaboration

Dec 20, 2022

4 pages

Published in:

Phys.Rev.Lett. 130 (2023) 6, 061002

Published: Feb 10, 2023

e-Print:

2212.10527 [astro-ph.HE]

DOI:

10.1103/PhysRevLett.130.061002 (publication)

PDG:

{{\mathit X}^{0}}

Annihilation Cross Section

Report number:

KEK-TH-2487,
KEK-Cosmo-0307

Experiments:

MAGIC

View in:

ADS Abstract Service

reference search28 citations

Citations per year

Abstract: (APS)

Linelike features in TeV

γ

rays constitute a “smoking gun” for TeV-scale particle dark matter and new physics. Probing the Galactic Center region with ground-based Cherenkov telescopes enables the search for TeV spectral features in immediate association with a dense dark matter reservoir at a sensitivity out of reach for satellite

γ

-ray detectors, and direct detection and collider experiments. We report on 223 hours of observations of the Galactic Center region with the MAGIC stereoscopic telescope system reaching

γ

-ray energies up to 100 TeV. We improved the sensitivity to spectral lines at high energies using large-zenith-angle observations and a novel background modeling method within a maximum-likelihood analysis in the energy domain. No linelike spectral feature is found in our analysis. Therefore, we constrain the cross section for dark matter annihilation into two photons to

⟨ σ v ⟩ ≲ 5 \times 10^{- 28} {cm}^{3} s^{- 1}

at 1 TeV and

⟨ σ v ⟩ ≲ 1 \times 10^{- 25} {cm}^{3} s^{- 1}

at 100 TeV, achieving the best limits to date for a dark matter mass above 20 TeV and a cuspy dark matter profile at the Galactic Center. Finally, we use the derived limits for both cuspy and cored dark matter profiles to constrain supersymmetric wino models.

Note:

Accepted in Phys. Rev. Lett., includes Supplemental materials. 9+4 pages, 3+3 figures, 3 tables. Corresponding authors: T. Inada, D. Kerszberg, M. Hütten

dark matter: annihilation
energy: high
dark matter: mass
scale: TeV
up: annihilation
spectral
galaxy
MAGIC
sensitivity
satellite

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