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Conditional normalizing flows for IceCube event reconstruction

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dc.contributor.authorAbbasi, R.
dc.contributor.authorAckermann, M.
dc.contributor.authorAdams, J.
dc.contributor.authorAgarwalla, S.K.
dc.contributor.authorAguilar, J.A.
dc.contributor.authorAhlers, M.
dc.contributor.authorAlameddine, J.M.
dc.contributor.authorAmin, N.M.
dc.contributor.authorAndeen, K.
dc.contributor.authorAnton, G.
dc.contributor.authorArgüelles, C.
dc.contributor.authorAshida, Y.
dc.contributor.authorAthanasiadou, S.
dc.contributor.authorAxani, S.N.
dc.contributor.authorBai, X.
dc.contributor.authorBalagopal, A.V.
dc.contributor.authorBaricevic, M.
dc.contributor.authorBarwick, S.W.
dc.contributor.authorBasu, V.
dc.contributor.authorBay, R.
dc.contributor.authoret al.
dc.contributor.conferenceInternational Cosmic Ray Conference (ICRC) (26 Jul 2023 - 3 Aug 2023 : Nagoya, Japan)
dc.date.issued2024
dc.description.abstractThe IceCube Neutrino Observatory is a cubic-kilometer high-energy neutrino detector deployed in the Antarctic ice. Two major event classes are charged-current electron and muon neutrino interactions. In this contribution, we discuss the inference of direction and energy for these classes using conditional normalizing flows. They allow to derive a posterior distribution for each individual event based on the raw data that can include systematic uncertainties, which makes them very promising for next-generation reconstructions. For each normalizing flow we use the differential entropy and the KL-divergence to its maximum entropy approximation to interpret the results. The normalizing flows correctly incorporate complex optical properties of the Antarctic ice and their relation to the embedded detector. For showers, the differential entropy increases in regions of high photon absorption and decreases in clear ice. For muons, the differential entropy strongly correlates with the contained track length. Coverage is maintained, even for low photon counts and highly asymmetrical contour shapes. For high-photon counts, the distributions get narrower and become more symmetrical, as expected from the asymptotic theorem of Bernstein-von-Mises. For shower directional reconstruction, we find the region between 1 TeV and 100 TeV to potentially benefit the most from normalizing flows because of azimuth-zenith asymmetries which have been neglected in previous analyses by assuming symmetrical contours. Events in this energy range play a vital role in the recent discovery of the galactic plane diffuse neutrino emission.
dc.identifier.citationProceedings of Science, 2024, vol.444, pp.1003-1-1003-11
dc.identifier.doi10.22323/1.444.1003
dc.identifier.issn1824-8039
dc.identifier.orcidBurley, R.T. [0000-0002-6712-787X]
dc.identifier.orcidCarnie-Bronca, E.G. [0000-0002-8195-5698]
dc.identifier.urihttps://hdl.handle.net/2440/149259
dc.language.isoen
dc.publisherSissa Medialab Srl
dc.publisher.placeItaly
dc.relation.grantARC
dc.rights© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
dc.source.urihttps://doi.org/10.22323/1.444.1003
dc.subjectceCube Neutrino Observatory
dc.subjectAntarctic
dc.titleConditional normalizing flows for IceCube event reconstruction
dc.typeConference paper
pubs.publication-statusPublished

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