Improved measurements of the TeV--PeV extragalactic neutrino spectrum from joint analyses of IceCube tracks and cascades

R Abbasi; M Ackermann; J Adams; S. K Agarwalla; J. A Aguilar; M Ahlers; J. M Alameddine; S Ali; N. M Amin; K Andeen; C Argüelles; Y Ashida; S Athanasiadou; S. N Axani; R Babu; X Bai; J Baines-Holmes; A. Balagopal V; S. W Barwick; S Bash; V Basu; R Bay; J. J Beatty; J. Becker Tjus; P Behrens; J Beise; C Bellenghi; B Benkel; S BenZvi; D Berley; E Bernardini; D. Z Besson; E Blaufuss; L Bloom; S Blot; I Bodo; F Bontempo; J. Y. Book Motzkin; C. Boscolo Meneguolo; S Böser; O Botner; J Böttcher; J Braun; B Brinson; Z Brisson-Tsavoussis; R. T Burley; D Butterfield; M. A Campana; K Carloni; J Carpio; S Chattopadhyay; N Chau; Z Chen; D Chirkin; S Choi; B. A Clark; A Coleman; P Coleman; G. H Collin; D. A. Coloma Borja; A Connolly; J. M Conrad; R Corley; D. F Cowen; C De Clercq; J. J DeLaunay; D Delgado; T Delmeulle; S Deng; P Desiati; K. D de Vries; G de Wasseige; T DeYoung; J. C Díaz-Vélez; S DiKerby; M Dittmer; A Domi; L Draper; L Dueser; D Durnford; K Dutta; M. A DuVernois; T Ehrhardt; L Eidenschink; A Eimer; P Eller; E Ellinger; D Elsässer; R Engel; H Erpenbeck; W Esmail; S Eulig; J Evans; P. A Evenson; K. L Fan; K Fang; K Farrag; A. R Fazely; A Fedynitch; N Feigl; C Finley; L Fischer; D Fox; A Franckowiak; S Fukami; P Fürst; J Gallagher; E Ganster; A Garcia; M Garcia; G Garg; E Genton; L Gerhardt; A Ghadimi; C Glaser; T Glüsenkamp; J. G Gonzalez; S Goswami; A Granados; D Grant; S. J Gray; S Griffin; S Griswold; K. M Groth; D Guevel; C Günther; P Gutjahr; C Ha; C Haack; A Hallgren; L Halve; F Halzen; L Hamacher; M. Ha Minh; M Handt; K Hanson; J Hardin; A. A Harnisch; P Hatch; A Haungs; J Häußler; K Helbing; J Hellrung; B Henke; L Hennig; F Henningsen; L Heuermann; R Hewett; N Heyer; S Hickford; A Hidvegi; C Hill; G. C Hill; R Hmaid; K. D 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. L Kelley; M Khanal; A. Khatee Zathul; A Kheirandish; H Kimku; J Kiryluk; C Klein; S. R Klein; Y Kobayashi; A Kochocki; R Koirala; H Kolanoski; T Kontrimas; L Köpke; C Kopper; D. J Koskinen; P Koundal; M Kowalski; T Kozynets; N Krieger; J Krishnamoorthi; T Krishnan; K Kruiswijk; E Krupczak; A Kumar; E Kun; N Kurahashi; N Lad; C. Lagunas Gualda; L. Lallement Arnaud; M Lamoureux; M. J Larson; F Lauber; J. P Lazar; K. Leonard DeHolton; A Leszczyńska; J Liao; C Lin; Y. T Liu; M Liubarska; C Love; L Lu; F Lucarelli; W Luszczak; Y Lyu; J Madsen; E Magnus; Y Makino; E Manao; S Mancina; A Mand; I. C Mariş; S Marka; Z Marka; L Marten; I Martinez-Soler; R 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. W 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. Obertacke Pollmann; V O'Dell; A Olivas; R Orsoe; 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 Pontén; V Poojyam; Y Popovych; M. Prado Rodriguez; B Pries; R Procter-Murphy; G. T Przybylski; L Pyras; C Raab; J Rack-Helleis; N Rad; M 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. J 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. G Schröder; L Schumacher; S Schwirn; S Sclafani; D Seckel; L Seen; M Seikh; S Seunarine; P. A. Sevle Myhr; R Shah; S Shefali; N Shimizu; B Skrzypek; R Snihur; J Soedingrekso; A Søgaard; D Soldin; P Soldin; G Sommani; C Spannfellner; G. M Spiczak; C Spiering; J Stachurska; M Stamatikos; T Stanev; T Stezelberger; T Stürwald; T Stuttard; G. W Sullivan; I Taboada; S Ter-Antonyan; A Terliuk; A Thakuri; M Thiesmeyer; W. G 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; T Van Eeden; N van Eijndhoven; L Van Rootselaar; J van Santen; J Vara; F Varsi; M Venugopal; M Vereecken; S. Vergara Carrasco; S Verpoest; D Veske; A Vijai; J Villarreal; C Walck; A Wang; E. H. S Warrick; C Weaver; P Weigel; A Weindl; J Weldert; A. Y Wen; C Wendt; J Werthebach; M Weyrauch; N Whitehorn; C. H Wiebusch; D. R Williams; L Witthaus; M Wolf; G Wrede; X. W Xu; J. P Yanez; Y Yao; E Yildizci; S Yoshida; R Young; F Yu; S Yu; T Yuan; A Zegarelli; S Zhang; Z Zhang; P Zhelnin; P Zilberman

doi:10.48550/arxiv.2507.22234

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Improved measurements of the TeV--PeV extragalactic neutrino spectrum from joint analyses of IceCube tracks and cascades

R Abbasi, M Ackermann, J Adams, S. K Agarwalla, J. A Aguilar, M Ahlers, J. M Alameddine, S Ali, N. M Amin, K Andeen, …

29 Jul 2025

DOI: https://doi.org/10.48550/arxiv.2507.22234

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Abstract

Physics - High Energy Astrophysical Phenomena

The IceCube South Pole Neutrino Observatory has discovered the presence of a diffuse astrophysical neutrino flux at energies of TeV and beyond using neutrino induced muon tracks and cascade events from neutrino interactions. We present two analyses sensitive to neutrino events in the energy range \SI{1}{TeV} to \SI{10}{PeV}, using more than 10 years of IceCube data. Both analyses consistently reject a neutrino spectrum following a single power-law with significance $>4\,σ$ in favor of a broken power law. We describe the methods implemented in the two analyses, the spectral constraints obtained, and the validation of the robustness of the results. Additionally, we report the detection of a muon neutrino in the MESE sample with an energy of $11.4^{+2.46}_{-2.53} $\,\si{PeV}, the highest energy neutrino observed by IceCube to date. The results presented here show insights into the spectral shape of astrophysical neutrinos, which has important implications for inferring their production processes in a multi-messenger picture.

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Title: Improved measurements of the TeV--PeV extragalactic neutrino spectrum from joint analyses of IceCube tracks and cascades
Creators: R Abbasi
M Ackermann
J Adams
S. K Agarwalla
J. A Aguilar
M Ahlers
J. M Alameddine
S Ali
N. M Amin
K Andeen
C Argüelles
Y Ashida
S Athanasiadou
S. N Axani
R Babu
X Bai
J Baines-Holmes
A. Balagopal V
S. W Barwick
S Bash
V Basu
R Bay
J. J Beatty
J. Becker Tjus
P Behrens
J Beise
C Bellenghi
B Benkel
S BenZvi
D Berley
E Bernardini
D. Z Besson
E Blaufuss
L Bloom
S Blot
I Bodo
F Bontempo
J. Y. Book Motzkin
C. Boscolo Meneguolo
S Böser
O Botner
J Böttcher
J Braun
B Brinson
Z Brisson-Tsavoussis
R. T Burley
D Butterfield
M. A Campana
K Carloni
J Carpio
S Chattopadhyay
N Chau
Z Chen
D Chirkin
S Choi
B. A Clark
A Coleman
P Coleman
G. H Collin
D. A. Coloma Borja
A Connolly
J. M Conrad
R Corley
D. F Cowen
C De Clercq
J. J DeLaunay
D Delgado
T Delmeulle
S Deng
P Desiati
K. D de Vries
G de Wasseige
T DeYoung
J. C Díaz-Vélez
S DiKerby
M Dittmer
A Domi
L Draper
L Dueser
D Durnford
K Dutta
M. A DuVernois
T Ehrhardt
L Eidenschink
A Eimer
P Eller
E Ellinger
D Elsässer
R Engel
H Erpenbeck
W Esmail
S Eulig
J Evans
P. A Evenson
K. L Fan
K Fang
K Farrag
A. R Fazely
A Fedynitch
N Feigl
C Finley
L Fischer
D Fox
A Franckowiak
S Fukami
P Fürst
J Gallagher
E Ganster
A Garcia
M Garcia
G Garg
E Genton
L Gerhardt
A Ghadimi
C Glaser
T Glüsenkamp
J. G Gonzalez
S Goswami
A Granados
D Grant
S. J Gray
S Griffin
S Griswold
K. M Groth
D Guevel
C Günther
P Gutjahr
C Ha
C Haack
A Hallgren
L Halve
F Halzen
L Hamacher
M. Ha Minh
M Handt
K Hanson
J Hardin
A. A Harnisch
P Hatch
A Haungs
J Häußler
K Helbing
J Hellrung
B Henke
L Hennig
F Henningsen
L Heuermann
R Hewett
N Heyer
S Hickford
A Hidvegi
C Hill
G. C Hill
R Hmaid
K. D 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. L Kelley
M Khanal
A. Khatee Zathul
A Kheirandish
H Kimku
J Kiryluk
C Klein
S. R Klein
Y Kobayashi
A Kochocki
R Koirala
H Kolanoski
T Kontrimas
L Köpke
C Kopper
D. J Koskinen
P Koundal
M Kowalski
T Kozynets
N Krieger
J Krishnamoorthi
T Krishnan
K Kruiswijk
E Krupczak
A Kumar
E Kun
N Kurahashi
N Lad
C. Lagunas Gualda
L. Lallement Arnaud
M Lamoureux
M. J Larson
F Lauber
J. P Lazar
K. Leonard DeHolton
A Leszczyńska
J Liao
C Lin
Y. T Liu
M Liubarska
C Love
L Lu
F Lucarelli
W Luszczak
Y Lyu
J Madsen
E Magnus
Y Makino
E Manao
S Mancina
A Mand
I. C Mariş
S Marka
Z Marka
L Marten
I Martinez-Soler
R 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. W 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. Obertacke Pollmann
V O'Dell
A Olivas
R Orsoe
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 Pontén
V Poojyam
Y Popovych
M. Prado Rodriguez
B Pries
R Procter-Murphy
G. T Przybylski
L Pyras
C Raab
J Rack-Helleis
N Rad
M 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. J 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. G Schröder
L Schumacher
S Schwirn
S Sclafani
D Seckel
L Seen
M Seikh
S Seunarine
P. A. Sevle Myhr
R Shah
S Shefali
N Shimizu
B Skrzypek
R Snihur
J Soedingrekso
A Søgaard
D Soldin
P Soldin
G Sommani
C Spannfellner
G. M Spiczak
C Spiering
J Stachurska
M Stamatikos
T Stanev
T Stezelberger
T Stürwald
T Stuttard
G. W Sullivan
I Taboada
S Ter-Antonyan
A Terliuk
A Thakuri
M Thiesmeyer
W. G 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
T Van Eeden
N van Eijndhoven
L Van Rootselaar
J van Santen
J Vara
F Varsi
M Venugopal
M Vereecken
S. Vergara Carrasco
S Verpoest
D Veske
A Vijai
J Villarreal
C Walck
A Wang
E. H. S Warrick
C Weaver
P Weigel
A Weindl
J Weldert
A. Y Wen
C Wendt
J Werthebach
M Weyrauch
N Whitehorn
C. H Wiebusch
D. R Williams
L Witthaus
M Wolf
G Wrede
X. W Xu
J. P Yanez
Y Yao
E Yildizci
S Yoshida
R Young
F Yu
S Yu
T Yuan
A Zegarelli
S Zhang
Z Zhang
P Zhelnin
P Zilberman
Resource Type: Preprint
Language: English
Academic Unit: Physics
Other Identifier: 991022068183304721

Improved measurements of the TeV--PeV extragalactic neutrino spectrum from joint analyses of IceCube tracks and cascades

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