K.-H. Becker
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View article: Measurement of atmospheric neutrino mixing with improved IceCube DeepCore calibration and data processing
Measurement of atmospheric neutrino mixing with improved IceCube DeepCore calibration and data processing Open
We describe a new data sample of IceCube DeepCore and report on the latest measurement of atmospheric neutrino oscillations obtained with data recorded between 2011-2019. The sample includes significant improvements in data calibration, de…
View article: Constraining High-Energy Neutrino Emission from Supernovae with IceCube
Constraining High-Energy Neutrino Emission from Supernovae with IceCube Open
Core-collapse supernovae are a promising potential high-energy neutrino source class. We test for correlation between seven years of IceCube neutrino data and a catalog containing more than 1000 core-collapse supernovae of types IIn and II…
View article: IceCube Search for Neutrinos Coincident with Gravitational Wave Events from LIGO/Virgo Run O3
IceCube Search for Neutrinos Coincident with Gravitational Wave Events from LIGO/Virgo Run O3 Open
Using data from the IceCube Neutrino Observatory, we searched for high-energy neutrino emission from the gravitational-wave events detected by the advanced LIGO and Virgo detectors during their third observing run. We did a low-latency fol…
View article: Limits on Neutrino Emission from GRB 221009A from MeV to PeV Using the IceCube Neutrino Observatory
Limits on Neutrino Emission from GRB 221009A from MeV to PeV Using the IceCube Neutrino Observatory Open
Gamma-ray bursts (GRBs) have long been considered a possible source of high-energy neutrinos. While no correlations have yet been detected between high-energy neutrinos and GRBs, the recent observation of GRB 221009A—the brightest GRB obse…
View article: Search for Unstable Sterile Neutrinos with the IceCube Neutrino Observatory
Search for Unstable Sterile Neutrinos with the IceCube Neutrino Observatory Open
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 Neutrino Observatory. Both the (stable) three-neutrino and the 3+1 st…
View article: Searching for High-Energy Neutrino Emission from Galaxy Clusters with IceCube
Searching for High-Energy Neutrino Emission from Galaxy Clusters with IceCube Open
Galaxy clusters have the potential to accelerate cosmic rays (CRs) to ultra-high energies via accretion shocks or embedded CR acceleration sites. CRs with energies below the Hillas condition will be confined within the cluster and will eve…
View article: Search for GeV-scale dark matter annihilation in the Sun with IceCube DeepCore
Search for GeV-scale dark matter annihilation in the Sun with IceCube DeepCore Open
The Sun provides an excellent target for studying spin-dependent dark matter-proton scattering due to its high matter density and abundant hydrogen content. Dark matter particles from the Galactic halo can elastically interact with Solar n…
View article: Searching for High-Energy Neutrinos from Ultra-Luminous Infrared Galaxies with IceCube
Searching for High-Energy Neutrinos from Ultra-Luminous Infrared Galaxies with IceCube Open
Ultra-luminous infrared galaxies (ULIRGs) have total infrared luminosities that exceed $10^{12}$ solar luminosities, making them the most luminous objects in the infrared sky. They are mainly powered by starbursts with star-formation rates…
View article: Non-standard neutrino interactions in IceCube
Non-standard neutrino interactions in IceCube Open
Non-standard neutrino interactions (NSI) may arise in various types of new physics. Their existence would change the potential that atmospheric neutrinos encounter when traversing Earth matter and hence alter their oscillation behavior. Th…
View article: Simulation study for the future IceCube-Gen2 surface array
Simulation study for the future IceCube-Gen2 surface array Open
The next generation of the IceCube Neutrino Observatory, IceCube-Gen2, will constitute a much larger detector, increasing the rate of high-energy neutrinos. IceCube-Gen2 will address the long-standing questions about astrophysical accelera…
View article: Search for Relativistic Magnetic Monopoles with Eight Years of IceCube Data
Search for Relativistic Magnetic Monopoles with Eight Years of IceCube Data Open
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 between 0.750c and 0.995c, without any explicit re…
View article: Search for Astrophysical Neutrinos from 1FLE Blazars with IceCube
Search for Astrophysical Neutrinos from 1FLE Blazars with IceCube Open
The majority of astrophysical neutrinos have undetermined origins. The IceCube Neutrino Observatory has observed astrophysical neutrinos but has not yet identified their sources. Blazars are promising source candidates, but previous search…
View article: Constraints on Populations of Neutrino Sources from Searches in the Directions of IceCube Neutrino Alerts
Constraints on Populations of Neutrino Sources from Searches in the Directions of IceCube Neutrino Alerts Open
Beginning in 2016, the IceCube Neutrino Observatory has sent out alerts in real time containing the information of high-energy ($E \gtrsim 100$~TeV) neutrino candidate events with moderate-to-high ($\gtrsim 30$\%) probability of astrophysi…
View article: Searching for Dark Matter from the Sun with the IceCube Detector
Searching for Dark Matter from the Sun with the IceCube Detector Open
The existence of dark matter (DM) has been well-established by repeated experiments probing various length scales. Even though DM is expected to make up 85\\% of the current matter content of the Universe, its nature remains unknown. One b…
View article: All-flavor constraints on nonstandard neutrino interactions and generalized matter potential with three years of IceCube DeepCore data
All-flavor constraints on nonstandard neutrino interactions and generalized matter potential with three years of IceCube DeepCore data Open
We report constraints on nonstandard neutrino interactions (NSI) from the observation of atmospheric neutrinos with IceCube, limiting all individual coupling strengths from a single dataset. Furthermore, IceCube is the first experiment to …
View article: The IceCube-Gen2 Collaboration -- Contributions to the 37th International Cosmic Ray Conference (ICRC2021)
The IceCube-Gen2 Collaboration -- Contributions to the 37th International Cosmic Ray Conference (ICRC2021) Open
IceCube-Gen2 is a planned extension of the IceCube Neutrino Observatory at the South Pole. The extension is optimized to search for sources of astrophysical neutrinos from TeV to EeV, and will improve the sensitivity of the observatory to …
View article: A New Search for Neutrino Point Sources with IceCube
A New Search for Neutrino Point Sources with IceCube Open
The IceCube Neutrino Observatory, deployed inside the deep glacial ice at the South Pole, is the largest neutrino telescope in the world. While eight years have passed since IceCube discovered a diffuse flux of high-energy astrophysical ne…
View article: Performance of the D-Egg optical sensor for the IceCube-Upgrade
Performance of the D-Egg optical sensor for the IceCube-Upgrade Open
New optical sensors called the "D-Egg" have been developed for cost-effective instrumentation for the IceCube Upgrade. With two 8-inch high quantum efficient photomultiplier tubes (PMTs), they offer increased effective photocathode area wh…
View article: Searching for time-dependent high-energy neutrino emission from X-ray binaries with IceCube
Searching for time-dependent high-energy neutrino emission from X-ray binaries with IceCube Open
X-ray binaries are long-standing source candidates of Galactic cosmic rays and neutrinos. The compact object in a binary system can be the site for cosmic-ray acceleration, while high-energy neutrinos can be produced by the interactions of…
View article: A Search for Neutrinos from Decaying Dark Matter in Galaxy Clusters and Galaxies with IceCube
A Search for Neutrinos from Decaying Dark Matter in Galaxy Clusters and Galaxies with IceCube Open
The observed dark matter abundance in the Universe can be explained with non-thermal, heavy dark matter models. In order for dark matter to still be present today, its lifetime has to far exceed the age of the Universe. In these scenarios,…
View article: Density of GeV Muons Measured with IceTop
Density of GeV Muons Measured with IceTop Open
We present a measurement of the density of GeV muons in near-vertical air showers using three years of data recorded by the IceTop array at the South Pole. We derive the muon densities as functions of energy at reference distances of 600 m…
View article: Indirect search for dark matter in the Galactic Centre with IceCube
Indirect search for dark matter in the Galactic Centre with IceCube Open
Even though there are strong astrophysical and cosmological indications to support the existence of dark matter, its exact nature remains unknown. We expect dark matter to produce standard model particles when annihilating or decaying, ass…
View article: Design and performance of the multi-PMT optical module for IceCube Upgrade
Design and performance of the multi-PMT optical module for IceCube Upgrade Open
The IceCube Upgrade is the first step towards the next-generation neutrino observatory at the South Pole, IceCube-Gen2, and will be installed in the central region of the existing array. The Upgrade will consist of 693 newly developed, den…
View article: Performance studies for a next-generation optical sensor for IceCube-Gen2
Performance studies for a next-generation optical sensor for IceCube-Gen2 Open
We present performance studies of a segmented optical module for the IceCube-Gen2 detector. Based on the experience gained in sensor development for the IceCube Upgrade, the new sensor will consist of up to eighteen 4 inch PMTs housed in a…
View article: Observation of Cosmic Ray Anisotropy with Nine Years of IceCube Data
Observation of Cosmic Ray Anisotropy with Nine Years of IceCube Data Open
The IceCube Observatory has collected over 577 billion cosmic-ray induced muon events in its final configuration from May 2011 to May 2020. We used this data set to provide an unprecedented statistically accurate map of the cosmic ray arri…
View article: Measuring the Neutrino Cross Section Using 8 years of Upgoing Muon Neutrinos Observed with IceCube
Measuring the Neutrino Cross Section Using 8 years of Upgoing Muon Neutrinos Observed with IceCube Open
The IceCube Neutrino Observatory detects neutrinos at energies orders of magnitude higher than those available to current accelerators. Above 40 TeV, neutrinos traveling through the Earth will be absorbed as they interact via charged curre…
View article: Posteriori analysis on IceCube double pulse tau neutrino candidates
Posteriori analysis on IceCube double pulse tau neutrino candidates Open
The IceCube Neutrino Observatory at the South Pole detects Cherenkov light emitted by charged secondary particles created by primary neutrino interactions. Double pulse waveforms can arise from charged current interactions of astrophysical…
View article: Studies of a muon-based mass sensitive parameter for the IceTop surface array
Studies of a muon-based mass sensitive parameter for the IceTop surface array Open
IceTop is the surface instrumentation of the IceCube Neutrino Observatory at the South Pole. It is designed to measure extensive air showers of cosmic rays in the primary energy range from PeV to EeV. Air showers induced by heavier primary…