Contributors: Abe, H; Abe, S; Acciari, V A; Aniello, T; Ansoldi, S; Antonelli, L A; Arbet Engels, A; Arcaro, C; Artero, M; Asano, K; Baack, D; Babić, A; Baquero, A; Barres de Almeida, U; Barrio, J A; Batković, I; Baxter, J; Becerra González, J; Bednarek, W; Bernardini, E; Bernardos, M; Berti, A; Besenrieder, J; Bhattacharyya, W; Bigongiari, C; Biland, A; Blanch, O; Bonnoli, G; Bošnjak, Ž; Burelli, I; Busetto, G; Carosi, R; Carretero-Castrillo, M; Ceribella, G; Chai, Y; Chilingarian, A; Cikota, S; Colombo, E; Contreras, J L; Cortina, J; Covino, S; D'Amico, G; D'Elia, V; Da Vela, P; Dazzi, F; De Angelis, A; De Lotto, B; Del Popolo, A; Delfino, M; Delgado, J; Delgado Mendez, C; Depaoli, D; Di Pierro, F; Di Venere, L; Do Souto Espiñeira, E; Dominis Prester, D; Donini, A; Dorner, D; Doro, M; Elsaesser, D; Emery, G; Fallah Ramazani, V; Fariña, L; Fattorini, A; Font, L; Fruck, C; Fukami, S; Fukazawa, Y; García López, R J; Garczarczyk, M; Gasparyan, S; Gaug, M; Giesbrecht Paiva, J G; Giglietto, N; Giordano, F; Gliwny, P; Godinović, N; Green, J G; Green, D; Hadasch, D; Hahn, A; Hassan, T; Heckmann, L; Herrera, J; Hrupec, D; Hütten, M; Imazawa, R; Inada, T; Iotov, R; Ishio, K; Jiménez Martínez, I; Jormanainen, J; Kerszberg, D; Kobayashi, Y; Kubo, H; Kushida, J; Lamastra, A; Lelas, D; Leone, F; Lindfors, E
نبذة مختصرة : 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 ⟨σv⟩≲5×10^{-28} cm^{3} s^{-1} at 1 TeV and ⟨σv⟩≲1×10^{-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.
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