Research output: Contribution to journal › Article › peer-review
Ultra-high Energy Event KM3-230213A as a Cosmogenic Neutrino in Light of Minimal UHECR Flux Models. / Kuznetsov, M. Yu; Petrov, N. A.; Savchenko, Y. S.
In: JETP Letters, Vol. 123, No. 5, 03.2026, p. 287–297.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Ultra-high Energy Event KM3-230213A as a Cosmogenic Neutrino in Light of Minimal UHECR Flux Models
AU - Kuznetsov, M. Yu
AU - Petrov, N. A.
AU - Savchenko, Y. S.
N1 - Kuznetsov, M.Y., Petrov, N.A. & Savchenko, Y.S. Ultra-High Energy Event KM3-230213A as a Cosmogenic Neutrino in Light of Minimal UHECR Flux Models. Jetp Lett. 123, 287–297 (2026). https://doi.org/10.1134/S0021364025610061 This work was supported by the Russian Science Foundation, project no. 25-12-00111.
PY - 2026/3
Y1 - 2026/3
N2 - Recently, the KM3NeT experiment reported the detection of a neutrino with exceptionally high energy E = 220 PeV, whose origin remains unclear. The corresponding value of the neutrino flux is in tension with the results of other high-energy neutrino experiments. In this study, we discuss the possibility that this neutrino is cosmogenic, i.e., produced by ultra-high energy cosmic rays during their propagation through the intergalactic medium. We adopt the ultra-high energy cosmic rays flux models derived by the Telescope Array experiment, which features a predominantly light mass composition. We show that the predictions of the cosmogenic neutrino flux in these models are consistent with the measurements of the KM3NeT-only and with that of the “global neutrino observatory” at approximately 2σ level. Notably, this result is achieved in a minimal version of the ultra-high energy cosmic rays flux models, that assume one source population with a standard cosmological evolution. We also estimate the corresponding cosmogenic gamma-ray flux and show that it is consistent with Fermi-LAT Isotropic Diffuse Gamma-Ray Background measurements and ultra-high energy gamma-ray limits; the improvement of the latter can probe these predictions in future.
AB - Recently, the KM3NeT experiment reported the detection of a neutrino with exceptionally high energy E = 220 PeV, whose origin remains unclear. The corresponding value of the neutrino flux is in tension with the results of other high-energy neutrino experiments. In this study, we discuss the possibility that this neutrino is cosmogenic, i.e., produced by ultra-high energy cosmic rays during their propagation through the intergalactic medium. We adopt the ultra-high energy cosmic rays flux models derived by the Telescope Array experiment, which features a predominantly light mass composition. We show that the predictions of the cosmogenic neutrino flux in these models are consistent with the measurements of the KM3NeT-only and with that of the “global neutrino observatory” at approximately 2σ level. Notably, this result is achieved in a minimal version of the ultra-high energy cosmic rays flux models, that assume one source population with a standard cosmological evolution. We also estimate the corresponding cosmogenic gamma-ray flux and show that it is consistent with Fermi-LAT Isotropic Diffuse Gamma-Ray Background measurements and ultra-high energy gamma-ray limits; the improvement of the latter can probe these predictions in future.
UR - https://www.scopus.com/pages/publications/105031565213
UR - https://www.mendeley.com/catalogue/05306f6a-f333-378d-99cc-9c219c8acce7/
U2 - 10.1134/S0021364025610061
DO - 10.1134/S0021364025610061
M3 - Article
VL - 123
SP - 287
EP - 297
JO - JETP Letters
JF - JETP Letters
SN - 0021-3640
IS - 5
ER -
ID: 75989410