Measurement of the Three-Flavor Composition of Astrophysical Neutrinos with Contained IceCube Events
Abstract
The IceCube Neutrino Observatory at the South Pole detects neutrinos from the entire sky, both of astrophysical and atmospheric origin, via the Cherenkov light emitted when these neutrinos interact in the ice, giving rise to rapidly moving charged particles. Neutrino events with vertices contained within the detector volume are useful for studying the neutrino flavor ratio, as they allow for a better reconstruction of the event morphology. The Medium Energy Starting Events (MESE) data sample is a selection of such events with energies of at least 1 TeV. This sample includes electron-, muon-, and tau-neutrino events, processed consistently. We use it to constrain the flavor ratio of astrophysical neutrinos at Earth, which in turn informs us of the flavor composition at the source itself. In this talk, we will present the results of this study, based on 11.4 years of IceCube data.
Authors 97
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The University of Adelaide · University of Utah
Affiliation as printed
Department of Physics , University of Adelaide , Adelaide , 5005 , Australia
University of Utah
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University of Wisconsin–Madison · University of Alaska Anchorage
Affiliation as printed
Dept. of Physics and Astronomy , University of Alaska Anchorage , 3211 Providence Dr. , Anchorage , AK 99508 , USA
University of Wisconsin-Madison
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Affiliation as printed
Université Libre de Bruxelles , Science Faculty CP230 , B-1050 Brussels , Belgium
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University of California, Berkeley
Affiliation as printed
Dept. of Physics , University of California , Berkeley , CA 94720 , USA
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Affiliation as printed
Fakultät für Physik & Astronomie , Ruhr-Universität Bochum , D-44780 Bochum , Germany
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RWTH Aachen University · University of Delaware
Affiliation as printed
III. Physikalisches Institut , RWTH Aachen University , D-52056 Aachen , Germany
University of Delaware
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Georgia Institute of Technology
Affiliation as printed
School of Physics and Center for Relativistic Astrophysics , Georgia Institute of Technology , Atlanta , GA 30332 , USA
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The University of Adelaide · University of Utah
Affiliation as printed
Department of Physics , University of Adelaide , Adelaide , 5005 , Australia
University of Utah
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RWTH Aachen University · University of Delaware
Affiliation as printed
III. Physikalisches Institut , RWTH Aachen University , D-52056 Aachen , Germany
University of Delaware
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Affiliation as printed
Université Libre de Bruxelles , Science Faculty CP230 , B-1050 Brussels , Belgium
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RWTH Aachen University · University of Delaware
Affiliation as printed
III. Physikalisches Institut , RWTH Aachen University , D-52056 Aachen , Germany
University of Delaware
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RWTH Aachen University · University of Delaware
Affiliation as printed
III. Physikalisches Institut , RWTH Aachen University , D-52056 Aachen , Germany
University of Delaware
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Southern University and Agricultural and Mechanical College
Affiliation as printed
Dept. of Physics , Southern University , Baton Rouge , LA 70813 , USA
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