par Abbasi, Rasha;Aguilar Sanchez, Juan Antonio 
;Chau, Thien Nhan ;Maris, Ioana Codrina ;Schlüter, Felix ;Toscano, Simona ; [et al.]
Référence (26 July 2023 through 3 August 2023: Nagoya), 38th International Cosmic Ray Conference, ICRC 2023, Pos proceedings of science (444), 104638th
Publication Publié, 2024-03-01
;Chau, Thien Nhan ;Maris, Ioana Codrina ;Schlüter, Felix ;Toscano, Simona ; [et al.]Référence (26 July 2023 through 3 August 2023: Nagoya), 38th International Cosmic Ray Conference, ICRC 2023, Pos proceedings of science (444), 104638th
Publication Publié, 2024-03-01
Publication dans des actes
| Résumé : | The Ice Cube Neutrino Observatory has been measuring an isotropic astrophysical neutrino flux in multiple detection channels for almost a decade. Galactic diffuse emission, which arises from the interactions between cosmic rays and the interstellar medium, is an expected signal in IceCube. The superposition of an extragalactic flux and a galactic flux results in directional structure and variations in the spectrum. In this work, we use 12.3 years of high-purity muon-neutrino induced muon track data to perform a dedicated search for this galactic emission, combined with a spectral measurement of the isotropic astrophysical neutrino flux. To distinguish a galactic component from the dominant atmospheric and isotropic astrophysical components, the precise directional information available for muon tracks is fully utilized in a three-dimensional forward folding likelihood fit. We test a state-of-the-art model prediction of galactic diffuse emission based on recent cosmic ray data (CRINGE). We fit this prediction as a template scaled by a factor ΨCRINGE, and find 2.9 ± 1.1 × ΨCRINGE with a significance of 2.7σ in an energy range between 400 GeV and 60 TeV in the Northern Sky. |
