Constraints on the diffuse flux of multi-PeV astrophysical neutrinos obtained with the Baikal Gigaton Volume Detector
V. A. AllakhverdyanJoint Institute for Nuclear ResearchA. D. AvrorinInstitute for Nuclear ResearchA. V. AvrorinInstitute for Nuclear ResearchV. M. AynutdinovInstitute for Nuclear ResearchZ. BeňušováComenius UniversityI. A. BelolaptikovJoint Institute for Nuclear ResearchЭ. А. БондаревInstitute for Nuclear ResearchI. V. BorinaJoint Institute for Nuclear ResearchN. M. BudnevIrkutsk State UniversityV. A. ChadymovMoscow State UniversityA. ChepurnovMoscow State UniversityV.Y. DikInstitute of Nuclear Physics ME RKA. N. DmitrievaNational Research Nuclear University MEPHIG. V. DomogatskyInstitute for Nuclear ResearchА. А. ДорошенкоInstitute for Nuclear ResearchR. DvornickýComenius UniversityA. DyachokIrkutsk State UniversityЖ.-А. М. ДжилкибаевInstitute for Nuclear ResearchE. EckerováComenius UniversityT.V. ElzhovJoint Institute for Nuclear ResearchВ. Н. ФоминIrkutsk State UniversityA. R. GafarovIrkutsk State UniversityK. V. GolubkovInstitute for Nuclear ResearchT.I. GressIrkutsk State UniversityK. G. KebkalLATENAВ. К. КебкалLATENAIvan KharukInstitute for Nuclear ResearchS. S. KhokhlovNational Research Nuclear University MEPHIE. V. KhramovJoint Institute for Nuclear ResearchM.M. KolbinJoint Institute for Nuclear ResearchS.O. KoligaevINFRADK. V. KonischevJoint Institute for Nuclear ResearchА. В. КоробченкоJoint Institute for Nuclear ResearchА. П. КошечкинInstitute for Nuclear ResearchV. KozhinMoscow State UniversityM.V. KruglovJoint Institute for Nuclear ResearchV. F. KulepovNizhny Novgorod State Technical UniversityA. KulikovIrkutsk State UniversityY. LemeshevIrkutsk State UniversityM. V. LisitsinNational Research Nuclear University MEPHIS. V. LovtsovIrkutsk State UniversityР. Р. МиргазовIrkutsk State UniversityD. NaumovJoint Institute for Nuclear ResearchА. Г. НиколаевMoscow State UniversityI. A. PerevalovaIrkutsk State UniversityА. А. ПетрухинNational Research Nuclear University MEPHID. P. PetukhovInstitute for Nuclear ResearchE.N. PliskovskyJoint Institute for Nuclear ResearchM. I. RozanovUniversityE. V. RyabovIrkutsk State UniversityGrigory SafronovInstitute for Nuclear ResearchB. A. ShaybonovJoint Institute for Nuclear ResearchV. Yu. ShishkinSkobeltsyn Institute of Nuclear Physics MSUE. V. ShirokovMoscow State UniversityF. ŠimkovicComenius UniversityA. E. SirenkoJoint Institute for Nuclear ResearchA. V. SkurikhinMoscow State UniversityA. G. SolovjevJoint Institute for Nuclear ResearchМ. Н. СороковиковJoint Institute for Nuclear ResearchI. ŠteklCzech Technical UniversityA. P. StromakovInstitute for Nuclear ResearchО. В. СувороваInstitute for Nuclear ResearchВ. А. ТаболенкоIrkutsk State UniversityV. I. TretjakJoint Institute for Nuclear ResearchB. B. UlzutuevJoint Institute for Nuclear ResearchY.V YablokovaJoint Institute for Nuclear ResearchD. N. ZaborovInstitute for Nuclear ResearchS. I. ZavjalovJoint Institute for Nuclear ResearchD. Y. ZvezdovJoint Institute for Nuclear ResearchA. V. PlavinBlack Hole Initiative at Harvard UniversityD. SemikozUniversité Paris DiderotS. TroitskyInstitute for Nuclear Research
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Various theoretical models predict cosmic neutrinos with multi-PeV energies. The recent detection of a $\ensuremath{\sim}{10}^{17}\text{ }\text{ }\mathrm{eV}$ neutrino in the KM3NeT experiment suggests that these energetic particles can be studied with present-day installations. Here, we present upper limits on the flux of astrophysical neutrinos with energies $({10}^{15.5}--{10}^{20})\text{ }\text{ }\mathrm{eV}$ obtained with the largest liquid-water neutrino telescope, the Baikal Gigaton Volume Detector (GVD), operation using cascadelike events. We discuss astrophysical implications of these results and constrain several cosmogenic neutrino scenarios using a combination of Baikal-GVD, KM3NeT, IceCube, and Auger data.
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