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Probing the Galactic neutrino flux at neutrino energies above 200 TeV with the Baikal Gigaton Volume Detector

Fuente: arXiv

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Bibliographic Details
Main Authors:	Allakhverdyan, V. A., Avrorin, A. D., Avrorin, A. V., Aynutdinov, V. M., Bardačová, Z., Belolaptikov, I. A., Bondarev, E. A., Borina, I. V., Budnev, N. M., Chadymov, V. A., Chepurnov, A. S., Dik, V. Y., Domogatsky, G. V., Doroshenko, A. A., Dvornický, R., Dyachok, A. N., Dzhilkibaev, Zh. -A. M., Eckerová, E., Elzhov, T. V., Fomin, V. N., Gafarov, A. R., Golubkov, K. V., Gorshkov, N. S., Gress, T. I., Kebkal, K. G., Kebkal, V. K., Kharuk, I. V., Khramov, E. V., Kleimenov, M. I., Kolbin, M. M., Koligaev, S. O., Konischev, K. V., Korobchenko, A. V., Koshechkin, A. P., Kozhin, V. A., Kruglov, M. V., Kulepov, V. F., Kulikov, A. A., Lemeshev, Y. E., Mirgazov, R. R., Naumov, D. V., Nikolaev, A. S., Perevalova, I. A., Petukhov, D. P., Pliskovsky, E. N., Rozanov, M. I., Ryabov, E. V., Safronov, G. B., Shaybonov, B. A., Shishkin, V. Y., Shirokov, E. V., Šimkovic, F., Sirenko, A. E., Skurikhin, A. V., Solovjev, A. G., Sorokovikov, M. N., Štekl, I., Stromakov, A. P., Suvorova, O. V., Tabolenko, V. A., Tretjak, V. I., Ulzutuev, B. B., Yablokova, Y. V., Zaborov, D. N., Zavyalov, S. I., Zvezdov, D. Y., Kovalev, Y. Y., Plavin, A. V., Semikoz, D. V., Troitsky, S. V.
Format:	Preprint
Published:	2024
Subjects:	High Energy Astrophysical Phenomena
Online Access:	Acceder al recurso
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author	Allakhverdyan, V. A. Avrorin, A. D. Avrorin, A. V. Aynutdinov, V. M. Bardačová, Z. Belolaptikov, I. A. Bondarev, E. A. Borina, I. V. Budnev, N. M. Chadymov, V. A. Chepurnov, A. S. Dik, V. Y. Domogatsky, G. V. Doroshenko, A. A. Dvornický, R. Dyachok, A. N. Dzhilkibaev, Zh. -A. M. Eckerová, E. Elzhov, T. V. Fomin, V. N. Gafarov, A. R. Golubkov, K. V. Gorshkov, N. S. Gress, T. I. Kebkal, K. G. Kebkal, V. K. Kharuk, I. V. Khramov, E. V. Kleimenov, M. I. Kolbin, M. M. Koligaev, S. O. Konischev, K. V. Korobchenko, A. V. Koshechkin, A. P. Kozhin, V. A. Kruglov, M. V. Kulepov, V. F. Kulikov, A. A. Lemeshev, Y. E. Mirgazov, R. R. Naumov, D. V. Nikolaev, A. S. Perevalova, I. A. Petukhov, D. P. Pliskovsky, E. N. Rozanov, M. I. Ryabov, E. V. Safronov, G. B. Shaybonov, B. A. Shishkin, V. Y. Shirokov, E. V. Šimkovic, F. Sirenko, A. E. Skurikhin, A. V. Solovjev, A. G. Sorokovikov, M. N. Štekl, I. Stromakov, A. P. Suvorova, O. V. Tabolenko, V. A. Tretjak, V. I. Ulzutuev, B. B. Yablokova, Y. V. Zaborov, D. N. Zavyalov, S. I. Zvezdov, D. Y. Kovalev, Y. Y. Plavin, A. V. Semikoz, D. V. Troitsky, S. V.
author_facet	Allakhverdyan, V. A. Avrorin, A. D. Avrorin, A. V. Aynutdinov, V. M. Bardačová, Z. Belolaptikov, I. A. Bondarev, E. A. Borina, I. V. Budnev, N. M. Chadymov, V. A. Chepurnov, A. S. Dik, V. Y. Domogatsky, G. V. Doroshenko, A. A. Dvornický, R. Dyachok, A. N. Dzhilkibaev, Zh. -A. M. Eckerová, E. Elzhov, T. V. Fomin, V. N. Gafarov, A. R. Golubkov, K. V. Gorshkov, N. S. Gress, T. I. Kebkal, K. G. Kebkal, V. K. Kharuk, I. V. Khramov, E. V. Kleimenov, M. I. Kolbin, M. M. Koligaev, S. O. Konischev, K. V. Korobchenko, A. V. Koshechkin, A. P. Kozhin, V. A. Kruglov, M. V. Kulepov, V. F. Kulikov, A. A. Lemeshev, Y. E. Mirgazov, R. R. Naumov, D. V. Nikolaev, A. S. Perevalova, I. A. Petukhov, D. P. Pliskovsky, E. N. Rozanov, M. I. Ryabov, E. V. Safronov, G. B. Shaybonov, B. A. Shishkin, V. Y. Shirokov, E. V. Šimkovic, F. Sirenko, A. E. Skurikhin, A. V. Solovjev, A. G. Sorokovikov, M. N. Štekl, I. Stromakov, A. P. Suvorova, O. V. Tabolenko, V. A. Tretjak, V. I. Ulzutuev, B. B. Yablokova, Y. V. Zaborov, D. N. Zavyalov, S. I. Zvezdov, D. Y. Kovalev, Y. Y. Plavin, A. V. Semikoz, D. V. Troitsky, S. V.
contents	Recent observations of the Galactic component of the high-energy neutrino flux, together with the detection of the diffuse Galactic gamma-ray emission up to sub-PeV energies, open new possibilities to study the acceleration and propagation of cosmic rays in the Milky Way. At the same time, both large non-astrophysical backgrounds at TeV energies and scarcity of neutrino events in the sub-PeV band currently limit these analyses. Here we use the sample of cascade events with estimated neutrino energies above 200 TeV, detected by the partially deployed Baikal Gigaton Volume Detector (GVD) in six years of operation, to test the continuation of the Galactic neutrino spectrum to sub-PeV energies. We find that the distribution of the arrival directions of Baikal-GVD cascades above 200 TeV in the sky suggests an excess of neutrinos from low Galactic latitudes with the chance probability of 1.4e-2. We find the excess above 200 TeV also in the most recent IceCube public data sets, both of cascades and tracks. The chance probability of the excess in the combined IceCube and Baikal-GVD analysis is 3.4e-4. The flux of Galactic neutrinos above 200~TeV challenges often-used templates for neutrino search based on cosmic-ray simulations.
format	Preprint
id	arxiv_https___arxiv_org_abs_2411_05608
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Probing the Galactic neutrino flux at neutrino energies above 200 TeV with the Baikal Gigaton Volume Detector Allakhverdyan, V. A. Avrorin, A. D. Avrorin, A. V. Aynutdinov, V. M. Bardačová, Z. Belolaptikov, I. A. Bondarev, E. A. Borina, I. V. Budnev, N. M. Chadymov, V. A. Chepurnov, A. S. Dik, V. Y. Domogatsky, G. V. Doroshenko, A. A. Dvornický, R. Dyachok, A. N. Dzhilkibaev, Zh. -A. M. Eckerová, E. Elzhov, T. V. Fomin, V. N. Gafarov, A. R. Golubkov, K. V. Gorshkov, N. S. Gress, T. I. Kebkal, K. G. Kebkal, V. K. Kharuk, I. V. Khramov, E. V. Kleimenov, M. I. Kolbin, M. M. Koligaev, S. O. Konischev, K. V. Korobchenko, A. V. Koshechkin, A. P. Kozhin, V. A. Kruglov, M. V. Kulepov, V. F. Kulikov, A. A. Lemeshev, Y. E. Mirgazov, R. R. Naumov, D. V. Nikolaev, A. S. Perevalova, I. A. Petukhov, D. P. Pliskovsky, E. N. Rozanov, M. I. Ryabov, E. V. Safronov, G. B. Shaybonov, B. A. Shishkin, V. Y. Shirokov, E. V. Šimkovic, F. Sirenko, A. E. Skurikhin, A. V. Solovjev, A. G. Sorokovikov, M. N. Štekl, I. Stromakov, A. P. Suvorova, O. V. Tabolenko, V. A. Tretjak, V. I. Ulzutuev, B. B. Yablokova, Y. V. Zaborov, D. N. Zavyalov, S. I. Zvezdov, D. Y. Kovalev, Y. Y. Plavin, A. V. Semikoz, D. V. Troitsky, S. V. High Energy Astrophysical Phenomena Recent observations of the Galactic component of the high-energy neutrino flux, together with the detection of the diffuse Galactic gamma-ray emission up to sub-PeV energies, open new possibilities to study the acceleration and propagation of cosmic rays in the Milky Way. At the same time, both large non-astrophysical backgrounds at TeV energies and scarcity of neutrino events in the sub-PeV band currently limit these analyses. Here we use the sample of cascade events with estimated neutrino energies above 200 TeV, detected by the partially deployed Baikal Gigaton Volume Detector (GVD) in six years of operation, to test the continuation of the Galactic neutrino spectrum to sub-PeV energies. We find that the distribution of the arrival directions of Baikal-GVD cascades above 200 TeV in the sky suggests an excess of neutrinos from low Galactic latitudes with the chance probability of 1.4e-2. We find the excess above 200 TeV also in the most recent IceCube public data sets, both of cascades and tracks. The chance probability of the excess in the combined IceCube and Baikal-GVD analysis is 3.4e-4. The flux of Galactic neutrinos above 200~TeV challenges often-used templates for neutrino search based on cosmic-ray simulations.
title	Probing the Galactic neutrino flux at neutrino energies above 200 TeV with the Baikal Gigaton Volume Detector
topic	High Energy Astrophysical Phenomena
url	https://arxiv.org/abs/2411.05608