Neutrino flavor composition using High Energy Starting Events with IceCube
N.N. Lad,
T. van Eeden*,
M. Ackermann,
IceCube,
R. Abbasi,
J. Adams,
S.K. Agarwalla, J. Aguilar, M. Ahlers, J.M. Alameddine, S. Ali, N.M.B. Amin, K. Andeen, C. Argüelles, Y. Ashida, S. Athanasiadou, S. Axani, R. Babu, X. Bai, J. Baines-Holmes, A. Balagopal V., S.W. Barwick, S. Bash, V. Basu, R. Bay, J. Beatty, J. Becker Tjus, P. Behrens, J. Beise, C. Bellenghi, B. Benkel, S. BenZvi, D. Berley, E. Bernardini, D. Besson, E. Blaufuss, L. Bloom, S. Blot, I. Bodo, F. Bontempo, J. Book Motzkin, C. Boscolo Meneguolo, S. Boser, O. Botner, J. Bottcher, J. Braun, B. Brinson, Z. Brisson-Tsavoussis, R.T. Burley, D. Butterfield, M. Campana, K. Carloni, J. Carpio, S. Chattopadhyay, T.N. Chau, Z. Chen, D. Chirkin, S. Choi, B. Clark, A. Coleman, P.J.C. Coleman, G. Collin, D.A. Coloma Borja, A. Connolly, J. Conrad, R. Corley, D. Cowen, C. De Clercq, J. DeLaunay, D. Delgado, T. Delmeulle, S. Deng, P. Desiati, K. de Vries, G. de Wasseige, T. DeYoung, J.C. Diaz-Velez, S. DiKerby, M. Dittmer, A. Domi, L. Draper, L. Dueser, D. Durnford, K. Dutta, M. DuVernois, T. Ehrhardt, L. Eidenschink, A. Eimer, P. Eller, E. Ellinger, D. Elsässer, R. Engel, H. Erpenbeck, W. Esmail, S. Eulig, J. Evans, P. Evenson, K.L. Fan, K. Fang, K.R. Farrag, A. Fazely, A. Fedynitch, N. Feigl, C. Finley, L. Fischer, D.B. Fox, A. Franckowiak, S. Fukami, P. Furst, J. Gallagher, E. Ganster, A. Garcia, M. Garcia, G. Garg, E. Genton, L. Gerhardt, A. Ghadimi, C. Glaser, T. Glüsenkamp, J. Gonzalez, S. Goswami, A. Granados, D. Grant, S. Gray, S. Griffin, S. Griswold, K.M. Groth, D.J. Guevel, C. Günther, P. Gutjahr, C.H. Ha, C. Haack, A. Hallgren, L. Halve, F. Halzen, L. Hamacher, M. Ha Minh, M. Handt, K. Hanson, J. Hardin, A. Harnisch, P. Hatch, A. Haungs, J. Haussler, K. Helbing, J. Hellrung, B. Henke, L. Hennig, F. Henningsen, L.P. Heuermann, R. Hewett, N. Heyer, S. Hickford, A. Hidvegi, C. Hill, G. Hill, R. Hmaid, K. Hoffman, D. Hooper, S. Hori, K. Hoshina, M. Hostert, W. Hou, T. Huber, K. Hultqvist, K. Hymon, A. Ishihara, W. Iwakiri, M. Jacquart, S. Jain, O. Janik, M. Jansson, M. Jeong, M. Jin, N. Kamp, D. Kang, W. Kang, X. Kang, A. Kappes, L. Kardum, T. Karg, M. Karl, A. Karle, A. Katil, M. Kauer, J. Kelley, M. Khanal, A. Khatee Zathul, A. Kheirandish, H. KimKu, J. Kiryluk, C. Klein, S. Klein, Y. Kobayashi, A. Kochocki, R. Koirala, H. Kolanoski, T. Kontrimas, L. Kopke, C. Kopper, J. Koskinen, P. Koundal, M. Kowalski, T. Kozynets, N. Krieger, K. Jayakumar, T. Krishnan, K. Kruiswijk, E. Krupczak, A. Kumar, E. Kun, N. Kurahashi, C. Lagunas Gualda, L. Lallement Arnaud, M. Lamoureux, M.J. Larson, F.H. Lauber, J. Lazar, K. Leonard DeHolton, A. Leszczynska, J. Liao, C. Lin, Y. Liu, M. Liubarska, C. Love, L. Lu, F. Lucarelli, W. Luszczak, Y. Lyu, J. Madsen, E. Magnus, K. Mahn, Y. Makino, E. Manao, S. Mancina, A. Mand, I.C. Maris, S. Marka, Z. Marka, L. Marten, I. Martinez-Soler, R.H. Maruyama, J. Mauro, F. Mayhew, F. McNally, J.V. Mead, K. Meagher, S. Mechbal, A. Medina, M. Meier, Y. Merckx, L. Merten, J. Mitchell, L. Molchany, T. Montaruli, R. Moore, Y. Morii, A. Mosbrugger, M. Moulai, D. Mousadi, E. Moyaux, T. Mukherjee, R. Naab, M. Nakos, U. Naumann, J. Necker, L. Neste, M. Neumann, H. Niederhausen, M.U. Nisa, K. Noda, A. Noell, A. Novikov, A. Pollmann, V. O'Dell, A. Olivas, R. Ørsøe, J. Osborn, E. O'Sullivan, V. Palusova, H. Pandya, A. Parenti, N. Park, V. Parrish, E.N. Paudel, L. Paul, C. Pérez de los Heros, T. Pernice, J. Peterson, M. Plum, A. Ponten, V. Poojyam, Y. Popovych, M. Prado Rodriguez, B. Pries, R. Procter-Murphy, G. Przybylski, L. Pyras, C. Raab, J. Rack-Helleis, N. Rad, M.L. Ravn, K. Rawlins, Z. Rechav, A. Rehman, I. Reistroffer, E. Resconi, S. Reusch, C.D. Rho, W. Rhode, L. Ricca, B. Riedel, A. Rifaie, E. Roberts, S. Robertson, M. Rongen, A. Rosted, C. Rott, T. Ruhe, L. Ruohan, D. Ryckbosch, J. Saffer, D. Salazar-Gallegos, P. Sampathkumar, A. Sandrock, G. Sanger-Johnson, M. Santander, S. Sarkar, J. Savelberg, M. Scarnera, P. Schaile, M. Schaufel, H. Schieler, S. Schindler, L. Schlickmann, B. Schlüter, F. Schlüter, N. Schmeisser, T. Schmidt, F. Schröder, L. Schumacher, S. Schwirn, S. Sclafani, D. Seckel, L. Seen, M.F.H. Seikh, S. Seunarine, P.A. Sevle Myhr, R. Shah, S. Shefali, S. N, B. Skrzypek, R. Snihur, J. Soedingrekso, A. Sogaard, D. Soldin, P. Soldin, G. Sommani, C. Spannfellner, G. Spiczak, C. Spiering, J. Stachurska, M. Stamatikos, T. Stanev, T. Stezelberger, T. Sturwald, T. Stuttard, G. Sullivan, I. Taboada, S. Ter-Antonyan, A. Terliuk, A. Thakuri, M. Thiesmeyer, W. Thompson, J. Thwaites, S. Tilav, K. Tollefson, S. Toscano, D. Tosi, A. Trettin, A.K. Upadhyay, K. Upshaw, A. Vaidyanathan, N. Valtonen-Mattila, J. Valverde, J. Vandenbroucke, N. van Eijndhoven, L. van Rootselaar, J. van Santen, F.J. Vara Carbonell, F. Varsi, M. Venugopal, M. Vereecken, S. Vergara Carrasco, S. Verpoest, D. Veske, A. Vijai, J. Villarreal, C. Walck, A. Wang, E. Warrick, C. Weaver, P. Weigel, A. Weindl, J. Weldert, A. Wen, C. Wendt, J. Werthebach, M. Weyrauch, N. Whitehorn, C. Wiebusch, D. Williams, L. Witthaus, M. Wolf, G. Wrede, X. Xu, J.P. Yanez, Y. Yao, E.B. Yildizci, S. Yoshida, R. Young, F. Yu, S. Yu, T. Yuan, A. Zegarelli, S. Zhang, Z. Zhang, P. Zhelnin and P. Zilbermanet al. (click to show)*: corresponding author
Pre-published on:
September 24, 2025
Published on:
—
Abstract
Astrophysical neutrinos provide crucial insights into their sources and play a key role in multi-
messenger astronomy. The neutrino flavor composition at Earth allows us to probe the mechanisms
of neutrino production and cosmic ray acceleration, as well as the properties of the environments
in which they originate. Understanding the flavor composition also offers a unique opportunity
to test new physics in the neutrino sector. The IceCube Neutrino Observatory consists of 1 km$^3$
of ice instrumented with photomultipliers that detect neutrinos through Cherenkov radiation from
their interaction products. Different neutrino interactions result in distinct event topologies, such
as tracks, cascades, and double cascade events, which allow for the identification of the interacting
neutrino type and measurement of the flavor composition of the astrophysical neutrino flux. In
this contribution we present the results of the measurement of the flavor ratio of the High-Energy
Starting Event Selection based on 12 years of data, a high-purity sample of neutrino interactions
that occur inside the detector. In addition, we discuss various methods that could further improve
the analysis in the future.
DOI: https://doi.org/10.22323/1.501.1198
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