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A Obertacke Pollmann

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Recent Articles
1.
Abbasi R, Ackermann M, Adams J, Agarwalla S, Aguilar J, Ahlers M, et al.
Phys Rev Lett . 2024 Dec; 133(20):201804. PMID: 39626708
This Letter presents the result of a 3+1 sterile neutrino search using 10.7 yr of IceCube data. We analyze atmospheric muon neutrinos that traverse the Earth with energies ranging from...
2.
Abbasi R, Ackermann M, Adams J, Agarwalla S, Aguilar J, Ahlers M, et al.
Phys Rev Lett . 2024 Apr; 132(15):151001. PMID: 38682982
We report on a measurement of astrophysical tau neutrinos with 9.7 yr of IceCube data. Using convolutional neural networks trained on images derived from simulated events, seven candidate ν_{τ} events...
3.
Abbasi R, Ackermann M, Adams J, Aguilar J, Ahlers M, Ahrens M, et al.
Science . 2023 Jun; 380(6652):1338-1343. PMID: 37384687
The origin of high-energy cosmic rays, atomic nuclei that continuously impact Earth's atmosphere, is unknown. Because of deflection by interstellar magnetic fields, cosmic rays produced within the Milky Way arrive...
4.
Abbasi R, Ackermann M, Adams J, Aguilar J, Ahlers M, Ahrens M, et al.
Science . 2022 Nov; 378(6619):538-543. PMID: 36378962
A supermassive black hole, obscured by cosmic dust, powers the nearby active galaxy NGC 1068. Neutrinos, which rarely interact with matter, could provide information on the galaxy's active core. We...
5.
Abbasi R, Ackermann M, Adams J, Aguilar J, Ahlers M, Ahrens M, et al.
Phys Rev Lett . 2022 Oct; 129(15):151801. PMID: 36269964
We present a search for an unstable sterile neutrino by looking for a resonant signal in eight years of atmospheric ν_{μ} data collected from 2011 to 2019 at the IceCube...
6.
Abbasi R, Ackermann M, Adams J, Aguilar J, Ahlers M, Ahrens M, et al.
Phys Rev Lett . 2022 Jul; 129(1):011804. PMID: 35841552
We report a search for nonstandard neutrino interactions (NSI) using eight years of TeV-scale atmospheric muon neutrino data from the IceCube Neutrino Observatory. By reconstructing incident energies and zenith angles...
7.
Abbasi R, Ackermann M, Adams J, Aguilar J, Ahlers M, Ahrens M, et al.
Phys Rev Lett . 2022 Feb; 128(5):051101. PMID: 35179913
We present an all-sky 90% confidence level upper limit on the cosmic flux of relativistic magnetic monopoles using 2886 days of IceCube data. The analysis was optimized for monopole speeds...
8.
Aartsen M, Abbasi R, Ackermann M, Adams J, Aguilar J, Ahlers M, et al.
Phys Rev Lett . 2020 Oct; 125(14):141801. PMID: 33064514
The results of a 3+1 sterile neutrino search using eight years of data from the IceCube Neutrino Observatory are presented. A total of 305 735 muon neutrino events are analyzed...
9.
Aartsen M, Ackermann M, Adams J, Aguilar J, Ahlers M, Ahrens M, et al.
Phys Rev Lett . 2020 Oct; 125(12):121104. PMID: 33016752
We report on the first measurement of the astrophysical neutrino flux using particle showers (cascades) in IceCube data from 2010-2015. Assuming standard oscillations, the astrophysical neutrinos in this dedicated cascade...
10.
Aartsen M, Ackermann M, Adams J, Aguilar J, Ahlers M, Ahrens M, et al.
Phys Rev Lett . 2020 Feb; 124(5):051103. PMID: 32083934
This Letter presents the results from pointlike neutrino source searches using ten years of IceCube data collected between April 6, 2008 and July 10, 2018. We evaluate the significance of...