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Measurement of the diffuse astrophysical neutrino flux over six seasons using cascade events from the Baikal-GVD expanding telescope

Fuente: arXiv

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Auteurs principaux:	GVD Collaboration, Allakhverdyan, V. A., Avrorin, A. D., Avrorin, A. V., Aynutdinov, V. M., Beňušová, Z., Belolaptikov, I. A., Bondarev, E. A., Borina, I. V., Budnev, N. M., Chadymov, V. A., Chepurnov, A. S., Dik, V. Y., Dmitrieva, A. N., 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., Gress, T. I., Kebkal, K. G., Kebkal, V. K., Kharuk, I. V., Khokhlov, S. S., Khramov, E. V., 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., Lisitsin, M. V., Lovtsov, S. V., Mirgazov, R. R., Naumov, D. V., Nikolaev, A. S., Perevalova, I. A., Petrukhin, A. 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., Zavjalov, S. I., Zvezdov, D. Y.
Format:	Preprint
Publié:	2025
Sujets:	High Energy Astrophysical Phenomena
Accès en ligne:	Acceder al recurso
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author	GVD Collaboration Allakhverdyan, V. A. Avrorin, A. D. Avrorin, A. V. Aynutdinov, V. M. Beňušová, Z. Belolaptikov, I. A. Bondarev, E. A. Borina, I. V. Budnev, N. M. Chadymov, V. A. Chepurnov, A. S. Dik, V. Y. Dmitrieva, A. N. 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. Gress, T. I. Kebkal, K. G. Kebkal, V. K. Kharuk, I. V. Khokhlov, S. S. Khramov, E. V. 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. Lisitsin, M. V. Lovtsov, S. V. Mirgazov, R. R. Naumov, D. V. Nikolaev, A. S. Perevalova, I. A. Petrukhin, A. 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. Zavjalov, S. I. Zvezdov, D. Y.
author_facet	GVD Collaboration Allakhverdyan, V. A. Avrorin, A. D. Avrorin, A. V. Aynutdinov, V. M. Beňušová, Z. Belolaptikov, I. A. Bondarev, E. A. Borina, I. V. Budnev, N. M. Chadymov, V. A. Chepurnov, A. S. Dik, V. Y. Dmitrieva, A. N. 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. Gress, T. I. Kebkal, K. G. Kebkal, V. K. Kharuk, I. V. Khokhlov, S. S. Khramov, E. V. 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. Lisitsin, M. V. Lovtsov, S. V. Mirgazov, R. R. Naumov, D. V. Nikolaev, A. S. Perevalova, I. A. Petrukhin, A. 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. Zavjalov, S. I. Zvezdov, D. Y.
contents	We present an updated measurement of the diffuse astrophysical neutrino flux using Baikal-GVD cascade data collected between April 2018 to March 2024. In this period, the detector grew from 15% to 55% of its baseline cubic kilometer configuration. The diffuse astrophysical neutrino flux is detected with a statistical significance of 5.1 $σ$. Assuming a single power law model of the astrophysical neutrino flux with identical contribution from each neutrino flavor, the following best-fit parameter values are found: the spectral index $γ_{astro}$ = 2.64$^{+0.09}_{-0.11}$ and the flux normalization $ϕ_{astro}$ = 4.42$^{+2.31}_{-1.29}\times10^{-18} \text{GeV}^{-1}\text{cm}^{-2}\text{s}^{-1}\text{sr}^{-1}$ per one flavor at 100 TeV. These results are broadly consistent with IceCube measurements.
format	Preprint
id	arxiv_https___arxiv_org_abs_2507_01893
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Measurement of the diffuse astrophysical neutrino flux over six seasons using cascade events from the Baikal-GVD expanding telescope GVD Collaboration Allakhverdyan, V. A. Avrorin, A. D. Avrorin, A. V. Aynutdinov, V. M. Beňušová, Z. Belolaptikov, I. A. Bondarev, E. A. Borina, I. V. Budnev, N. M. Chadymov, V. A. Chepurnov, A. S. Dik, V. Y. Dmitrieva, A. N. 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. Gress, T. I. Kebkal, K. G. Kebkal, V. K. Kharuk, I. V. Khokhlov, S. S. Khramov, E. V. 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. Lisitsin, M. V. Lovtsov, S. V. Mirgazov, R. R. Naumov, D. V. Nikolaev, A. S. Perevalova, I. A. Petrukhin, A. 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. Zavjalov, S. I. Zvezdov, D. Y. High Energy Astrophysical Phenomena We present an updated measurement of the diffuse astrophysical neutrino flux using Baikal-GVD cascade data collected between April 2018 to March 2024. In this period, the detector grew from 15% to 55% of its baseline cubic kilometer configuration. The diffuse astrophysical neutrino flux is detected with a statistical significance of 5.1 $σ$. Assuming a single power law model of the astrophysical neutrino flux with identical contribution from each neutrino flavor, the following best-fit parameter values are found: the spectral index $γ_{astro}$ = 2.64$^{+0.09}_{-0.11}$ and the flux normalization $ϕ_{astro}$ = 4.42$^{+2.31}_{-1.29}\times10^{-18} \text{GeV}^{-1}\text{cm}^{-2}\text{s}^{-1}\text{sr}^{-1}$ per one flavor at 100 TeV. These results are broadly consistent with IceCube measurements.
title	Measurement of the diffuse astrophysical neutrino flux over six seasons using cascade events from the Baikal-GVD expanding telescope
topic	High Energy Astrophysical Phenomena
url	https://arxiv.org/abs/2507.01893