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Full-Text Articles in Physics
Measurement Of Atmospheric Neutrino Oscillations At 6–56 Gev With Icecube Deepcore, Karen Andeen
Measurement Of Atmospheric Neutrino Oscillations At 6–56 Gev With Icecube Deepcore, Karen Andeen
Physics Faculty Research and Publications
We present a measurement of the atmospheric neutrino oscillation parameters using three years of data from the IceCube Neutrino Observatory. The DeepCore infill array in the center of IceCube enables the detection and reconstruction of neutrinos produced by the interaction of cosmic rays in Earth’s atmosphere at energies as low as ∼5 GeV. That energy threshold permits measurements of muon neutrino disappearance, over a range of baselines up to the diameter of the Earth, probing the same range of L/Eν as long-baseline experiments but with substantially higher-energy neutrinos. This analysis uses neutrinos from the full sky with reconstructed energies …
Multiwavelength Follow-Up Of A Rare Icecube Neutrino Multiplet, Karen Andeen
Multiwavelength Follow-Up Of A Rare Icecube Neutrino Multiplet, Karen Andeen
Physics Faculty Research and Publications
On February 17, 2016, the IceCube real-time neutrino search identified, for the first time, three muon neutrino candidates arriving within 100 s of one another, consistent with coming from the same point in the sky. Such a triplet is expected once every 13.7 years as a random coincidence of background events. However, considering the lifetime of the follow-up program the probability of detecting at least one triplet from atmospheric background is 32%. Follow-up observatories were notified in order to search for an electromagnetic counterpart. Observations were obtained by Swift’s X-ray telescope, by ASAS-SN, LCO and MASTER at optical wavelengths, …
All-Sky Search For Time-Integrated Neutrino Emission From Astrophysical Sources With 7 Yr Of Icecube Data, Karen Andeen
All-Sky Search For Time-Integrated Neutrino Emission From Astrophysical Sources With 7 Yr Of Icecube Data, Karen Andeen
Physics Faculty Research and Publications
Since the recent detection of an astrophysical flux of high-energy neutrinos, the question of its origin has not yet fully been answered. Much of what is known about this flux comes from a small event sample of high neutrino purity, good energy resolution, but large angular uncertainties. In searches for point-like sources, on the other hand, the best performance is given by using large statistics and good angular reconstructions. Track-like muon events produced in neutrino interactions satisfy these requirements. We present here the results of searches for point-like sources with neutrinos using data acquired by the IceCube detector over 7 …