Evidence for a Spectral Break or Curvature in the Spectrum of Astrophysical Neutrinos from 5\,TeV--10\,PeV

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.2507.22233

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$Evidence for a Spectral Break or Curvature in the Spectrum of Astrophysical Neutrinos from 5\,TeV--10\,PeV$

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Evidence for a Spectral Break or Curvature in the Spectrum of Astrophysical Neutrinos from 5\,TeV--10\,PeV

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.2507.22233

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Abstract

Physics - High Energy Astrophysical Phenomena

We report improved measurements of the all flavor astrophysical neutrino spectrum with IceCube by combining complementary neutrino samples in two independent analyses. Both analyses show evidence of a harder spectrum at energies below $\sim$30~TeV compared to higher energies where the spectrum is well characterized by a power law. The spectrum is better described by a log parabola or a broken power law, the latter being the preferred model. Both, however, reject a single power law over an energy range 5~TeV-10~PeV with a significance $>4σ$, providing new constraints on properties of cosmic neutrino sources.

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Title: Evidence for a Spectral Break or Curvature in the Spectrum of Astrophysical Neutrinos from 5\,TeV--10\,PeV
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: 991022068183404721

Evidence for a Spectral Break or Curvature in the Spectrum of Astrophysical Neutrinos from 5\,TeV--10\,PeV

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