R. Abbasi, M. Ackermann, J. Adams, Sanjib Kumar Agarwalla et al.
A measurement of the diffuse astrophysical neutrino spectrum is presented using IceCube data collected from 2011--2022 (10.3 years). We developed novel detection techniques to search for events with a contained vertex and exiting track induced by muon neutrinos undergoing a charged-current interacti...
Rasha Abbasi, M. Ackermann, J. Adams, Sanjib Kumar Agarwalla et al.
We present a search for the diffuse extremely-high-energy neutrino flux using 12.6 years of IceCube data. The nonobservation of neutrinos with energies well above 10 PeV constrains the all-flavor neutrino flux at 10^{18} eV to a level of E^{2}Φ_{ν_{e}+ν_{μ}+ν_{τ}}≃10^{-8} GeV cm^{-2} s^{-1} sr^{-1},...
R. Abbasi, M. Ackermann, J. Adams, Sanjib Kumar Agarwalla et al.
The DeepCore subdetector of the IceCube Neutrino Observatory provides access to neutrinos with energies above approximately 5 GeV. Data taken between 2012 and 2021 (3387 days) are utilized for an atmospheric ν_{μ} disappearance analysis that studied 150 257 neutrino-candidate events with reconstruct...
R. Abbasi, M. Ackermann, J. Adams, Sanjib Kumar Agarwalla et al.
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 0.5 to 100 TeV, incorporating significant improvements in modeling neutrino flux and detector response compared to ...
R. Abbasi, M. Ackermann, J. Adams, Sanjib Kumar Agarwalla et al.
We present a search for an eV-scale sterile neutrino using 7.5 years of data from the IceCube DeepCore detector. The analysis uses a sample of 21,914 events with energies between 5 and 150 GeV to search for sterile neutrinos through atmospheric muon neutrino disappearance. Improvements in event sele...
R. Abbasi, M. Ackermann, J. Adams, Sanjib Kumar Agarwalla et al.
Abstract The IceCube Neutrino Observatory relies on an array of photomultiplier tubes to detect Cherenkov light produced by charged particles in the South Pole ice. IceCube data analyses depend on an in-depth characterization of the glacial ice, and on novel approaches in event reconstruction that u...
R. Abbasi, M. Ackermann, J. Adams, Sanjib Kumar Agarwalla et al.
We provide supporting details for the search for a <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>3</a:mn><a:mo>+</a:mo><a:mn>1</a:mn></a:mrow></a:math> sterile neutrino using data collected over 10.7 years at the IceCube Neutrino Observatory. The analysis uses a...
R. Abbasi, M. Ackermann, J. Adams, Sanjib Kumar Agarwalla et al.
Abstract The nature of dark matter remains unresolved in fundamental physics. Weakly Interacting Massive Particles (WIMPs), which could explain the nature of dark matter, can be captured by celestial bodies like the Sun or Earth, leading to enhanced self-annihilation into Standard Model particles in...
R. Abbasi, M. Ackermann, J. Adams, Sanjib Kumar Agarwalla et al.
IceCube has observed a diffuse astrophysical neutrino flux over the energy region from a few TeV to a few PeV. At PeVenergies, the spectral shape is not yet well measured due to the low statistics of the data. This analysis probes the gap between 1 and 10 PeV by using high-energy downgoing muon neut...
R. Abbasi, M. Ackermann, J. Adams, Sanjib Kumar Agarwalla et al.
Abstract More than 10000 photomultiplier tubes (PMTs) with a diameter of 80 mm will be installed in multi-PMT Digital Optical Modules (mDOMs) of the IceCube Upgrade. These have been tested and pre-calibrated at two sites. A throughput of more than 1000 PMTs per week with both sites was achieved with...
R. Abbasi, M. Ackermann, J. Adams, Sanjib Kumar Agarwalla et al.
We present a measurement of the mean number of muons with energies larger than 500 GeV in near-vertical extensive air showers initiated by cosmic rays with primary energies between 2.5 and 100 PeV. The measurement is based on events detected in coincidence between the surface and in-ice detectors of...
Rasha Abbasi, M. Ackermann, J. Adams, Sanjib Kumar Agarwalla et al.
Abstract This study presents an analysis of seasonal variations in the atmospheric muon neutrino flux, using 11.3 years of data from the IceCube Neutrino Observatory. By leveraging a novel spectral unfolding method, we explore the energy range from 125 GeV to 10 TeV for zenith angles from $${90}^{\c...
R. Abbasi, M. Ackermann, J. Adams, Sanjib Kumar Agarwalla et al.
Abstract The IceCube Neutrino Observatory, instrumenting about 1 km 3 of deep, glacial ice at the geographic South Pole, is due to be enhanced with the IceCube Upgrade. The IceCube Upgrade, to be deployed during the 2025/26 Antarctic summer season, will consist of seven new strings of photosensors, ...
R. Abbasi, M. Ackermann, J. Adams, Sanjib Kumar Agarwalla et al.
We report a study of the inelasticity distribution in the scattering of neutrinos of energy 80–560 GeV off nucleons. Using atmospheric muon neutrinos detected in IceCube’s sub-array DeepCore during 2012–2021, we fit the observed inelasticity in the data to a parameterized expectation and extract the...