V. B. Petkov, I. A. Vaiman, N. A. Vasiliev, E. A. Gorbacheva, D. D. Dzhappuev, T. A. Dzhatdoyev, I. M. Dzaparova, K. V. Zhuravleva, I. S. Karpikov, N. F. Klimenko, A. U. Kudzhaev, A. N. Kurenya, A. S. Lidvansky, O. I. Mikhailova, E. I. Podlesny, N. A. Pozdnukhov, V. S. Romanenko, G. I. Rubtsov, S. V. Troitsky, I. B. Unatlokov, M. M. Khadzhiev, A. F. Yanin
{"title":"The Complex Air Shower Array Carpet-3 of the Baksan Neutrino Observatory of the INR RAS: Gamma Ray Astronomy Studies","authors":"V. B. Petkov, I. A. Vaiman, N. A. Vasiliev, E. A. Gorbacheva, D. D. Dzhappuev, T. A. Dzhatdoyev, I. M. Dzaparova, K. V. Zhuravleva, I. S. Karpikov, N. F. Klimenko, A. U. Kudzhaev, A. N. Kurenya, A. S. Lidvansky, O. I. Mikhailova, E. I. Podlesny, N. A. Pozdnukhov, V. S. Romanenko, G. I. Rubtsov, S. V. Troitsky, I. B. Unatlokov, M. M. Khadzhiev, A. F. Yanin","doi":"10.1134/S1063779624701971","DOIUrl":"10.1134/S1063779624701971","url":null,"abstract":"<p>The complex EAS array Carpet-3 is under construction now in the Baksan Neutrino Observatory of the INR RAS. The array is located at an altitude of 1700 m above sea level and is designed to record extensive air showers (EAS) of cosmic rays in the primary energy range from 10 TeV to 10 PeV. The underground muon detector with a total area of 410 m<sup>2</sup> allows for highly efficient separation of showers generated by primary gamma quanta of ultra-high energies from ordinary EAS formed by primary protons and nuclei. One of the main tasks of the EAS array is to measure the characteristics of high-energy gamma radiation of cosmic origin. The description and characteristics of the EAS array Carpet-3, as well as the research results obtained in the field of gamma-ray astronomy are presented.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"594 - 598"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. M. Gromushkin, A. N. Dmitrieva, A. A. Lukovnikov, A. Yu. Konovalova, E. S. Morgunov, E. P. Khomchuk, S. S. Khokhlov, I. A. Shulzhenko
{"title":"Neutron Module of a Solid-State Detector for Measuring Antineutrinos Using the Inverse Beta-Decay Reaction","authors":"D. M. Gromushkin, A. N. Dmitrieva, A. A. Lukovnikov, A. Yu. Konovalova, E. S. Morgunov, E. P. Khomchuk, S. S. Khokhlov, I. A. Shulzhenko","doi":"10.1134/S1063779624702113","DOIUrl":"10.1134/S1063779624702113","url":null,"abstract":"<p>To detect reactor antineutrinos, the reaction of their interaction with a proton (inverse beta decay) can be used. As a result of inverse beta-decay reaction, a neutron and a positron are produced. A positron can be detected with a plastic scintillator. To detect a neutron, a scintillator based on ZnS(Ag) with the addition of a neutron capturer <sup>6</sup>Li or <sup>10</sup>B can be used. A neutron module for a solid-state neutrino detector is being developed at MEPhI. The results of testing such module produced on the basis of the scintillation composition LRB-2 (ZnS(Ag) + B<sub>2</sub>О<sub>3</sub>) are presented.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"674 - 682"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Primordial Black Holes, Dark Matter, and Anti-Matter","authors":"A. D. Dolgov","doi":"10.1134/S1063779624702010","DOIUrl":"10.1134/S1063779624702010","url":null,"abstract":"<p>A review of observational data from the Hubble and James Webb space telescopes, and ALMA array is presented. It is argued that the discovered contradiction between the observational data and standard <span>(Lambda )</span>CDM cosmology is resolved if the Universe structure formation is seeded by primordial black holes. The proposed scenario is supported by the agreement with observations of the predicted log-normal mass spectrum of primordial black holes and the discovery of a significant amount of antimatter in the Galaxy.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"618 - 624"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. V. Budkovsky, I. V. Lapushansky, A. Tumasyan, S. V. Shmatov
{"title":"The Potential for Observing Hadron Jets in the SPD Experiment at NICA","authors":"D. V. Budkovsky, I. V. Lapushansky, A. Tumasyan, S. V. Shmatov","doi":"10.1134/S1063779624702290","DOIUrl":"10.1134/S1063779624702290","url":null,"abstract":"<p>The possibility of observing hadron jets in proton–proton collisions at energy <span>(sqrt s )</span> = 27 GeV in the SPD experiment is studied. The study is conducted using simulation data for the process <span>(qg to gamma q)</span> using the <span>(anti{text{-}}{{k}_{{text{T}}}},{{k}_{{text{T}}}})</span> and <span>(Cambridge - Aachen)</span> jet reconstruction algorithms<i>.</i> The results include analyzing the kinematic characteristics of the jets and an assessment of the expected statistics.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"784 - 789"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. E. Dergacheva, M. A. Kolupanova, A. V. Mefodiev, Yu. G. Kudenko, A. N. Khotjantsev, D. V. Fedorova, S. A. Fedotov, A. A. Chvirova, A. S. Shvartsman
{"title":"The Near Neutrino SuperFGD Detector for the T2K Experiment","authors":"A. E. Dergacheva, M. A. Kolupanova, A. V. Mefodiev, Yu. G. Kudenko, A. N. Khotjantsev, D. V. Fedorova, S. A. Fedotov, A. A. Chvirova, A. S. Shvartsman","doi":"10.1134/S106377962470240X","DOIUrl":"10.1134/S106377962470240X","url":null,"abstract":"<p>The SuperFGD (Super Fine-Grained Detector) detector is a key element of the upgraded near detector complex ND280 in the T2K experiment. The ND280 upgrade is aimed at reducing systematic errors in oscillation measurements to increase the experimental sensitivity to the CP-odd phase <span>({{delta }_{{{text{CP}}}}})</span>. We explore the current status of the SuperFGD detector and report results of the first measurements using muon neutrinos in the T2K neutrino beam in J-PARC.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"855 - 860"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. P. Serebrov, R. M. Samoilov, O. M. Zherebtsov, A. K. Fomin, N. S. Budanov
{"title":"On the Nature of the Sterile Neutrino","authors":"A. P. Serebrov, R. M. Samoilov, O. M. Zherebtsov, A. K. Fomin, N. S. Budanov","doi":"10.1134/S1063779624702393","DOIUrl":"10.1134/S1063779624702393","url":null,"abstract":"<p>According to the assumption that sterile neutrinos are right-handed neutrinos, an analysis of the current experimental situation in neutron decay for right-handed currents was carried out. As the result of the analysis, it was found that there is an indication of the existence of the right-handed vector boson <span>({{W}_{{text{R}}}})</span> with a mass of <span>({{M}_{{{{W}_{{text{R}}}}}}} = 304_{{ - 22}}^{{ + 28}},,~{text{GeV}})</span> and a mixing angle with <span>({{W}_{{text{L}}}})</span>: <span>(zeta = - 0.038 pm 0.014)</span>. It is shown that this result does not contradict experiments at colliders to search for the hypothetical vector boson. This circumstance is the basis for discussing the possibility of extending the Standard Model with an additional gauge vector boson <span>({{W}_{{text{R}}}})</span> with small mixing with the left-handed vector boson <span>({{W}_{{text{L}}}})</span>. In addition, there are grounds for considering the possibility of the existence of right-handed neutrinos. This circumstance is the basis for discussing the possibility of expanding the Standard Model with an additional gauge vector boson <span>({{W}_{{text{R}}}})</span> and right-handed neutrinos. In this regard, the possibility of explaining dark matter in the Universe by right-handed neutrinos is analyzed. Various aspects of such an approach to the problem of dark matter are discussed: dynamics of dark matter formation and stability of dark matter consisting of right-handed neutrinos.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"843 - 854"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. V. Anfimov, A. M. Gorin, A. G. Denisov, A. A. Durum, I. E. Kreslo, E. A. Ladygin, S. V. Lisovskii, A. V. Rybnikov, A. S. Selyunin, Yu. M. Tokunov, I. V. Shein, A. A. Yanovich
{"title":"The Lithium-Based Scintillating Glass for Neutron Detection","authors":"N. V. Anfimov, A. M. Gorin, A. G. Denisov, A. A. Durum, I. E. Kreslo, E. A. Ladygin, S. V. Lisovskii, A. V. Rybnikov, A. S. Selyunin, Yu. M. Tokunov, I. V. Shein, A. A. Yanovich","doi":"10.1134/S1063779624702149","DOIUrl":"10.1134/S1063779624702149","url":null,"abstract":"<p>Scintillating glasses with a high content of <sup>6</sup>Li are well proven materials for efficient detection of cold, thermal, and epi-thermal neutrons. In this work, we present an innovative laboratory-scale method for manufacturing of a scintillating glass based on a natural mixture of Li isotopes doped with Ce<sup>3+</sup> ions, as well as the results of the measurements of the light yield and neutron detection efficiency at the experimental-measuring stand “NEUTRON” of an U-70 accelerator complex at the National Research Center “Kurchatov Institute,” Institute for High Energy Physics.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"692 - 697"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Hybrid Vacuum Photon Detectors in Astroparticle Physics Experiments","authors":"B. K. Lubsandorzhiev","doi":"10.1134/S1063779624702101","DOIUrl":"10.1134/S1063779624702101","url":null,"abstract":"<p>Hybrid vacuum photon detectors developed for large-scale astroparticle physics experiments are reviewed. Hybrid photon detectors with luminescent screens have played a particularly important part in Cherenkov arrays used in the NT-200 deep-water neutrino telescope and the Tunka cosmic-ray experiment. This paper is devoted to the 40th anniversary since the beginning of the development of the QUASAR-370 hybrid photon detector lying at the heart of the NT-200 and Tunka experiments. Now hybrid vacuum photon detectors with microchannel plates (MCP-PMTs) are actively used in the JUNO neutrino experiment. The status of and trends in development of hybrid photon detectors and prospects for their use in next-generation experiments are discussed.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"668 - 673"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. G. Petrochenko, A. O. Gorkovenko, D. N. Grigoriev, A. N. Kozyrev, A. A. Ruban, Dz. V. Shoukovy, L. B. Epshtein, Yu. V. Yudin
{"title":"Project of a New Trigger for the CMD-3 Detector","authors":"V. G. Petrochenko, A. O. Gorkovenko, D. N. Grigoriev, A. N. Kozyrev, A. A. Ruban, Dz. V. Shoukovy, L. B. Epshtein, Yu. V. Yudin","doi":"10.1134/S1063779624702046","DOIUrl":"10.1134/S1063779624702046","url":null,"abstract":"<p>The CMD-3 detector is in operation at the VEPP-2000 <span>({{e}^{ + }})</span><span>({{e}^{ - }})</span> collider at Budker Institute of Nuclear Physics since 2008. The upgrade of the triggering subsystem is in progress: the new algorithm for the online processing is proposed, and the prototype of the Trigger Decision Board has been developed. The new algorithm enables more accurate measurements of the energy and the cluster coordinates in the calorimeters. The special work station has been constructed to verify Trigger Decision Board performance. Some results and description of the main technical solutions are presented.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"639 - 642"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. V. Dimova, M. N. Achasov, A. Yu. Barnyakov, K. I. Beloborodov, A. V. Berdyugin, A. G. Bogdanchikov, A. A. Botov, V. P. Druzhinin, A. G. Kharlamov, L. V. Kardapoltsev, D. P. Kovrizhin, A. A. Korol, A. S. Kupich, A. P. Kryukov, N. A. Melnikova, N. Yu. Muchnoi, A. E. Obrazovsky, E. V. Pakhtusova, K. V. Pugachev, S. I. Serednyakov, Z. K. Silagadze, I. K. Surin, D. A. Shtol, Yu. V. Usov, V. N. Zhabin
{"title":"Dalitz Plot Analysis of the e+e– → π+π–π0 Process","authors":"T. V. Dimova, M. N. Achasov, A. Yu. Barnyakov, K. I. Beloborodov, A. V. Berdyugin, A. G. Bogdanchikov, A. A. Botov, V. P. Druzhinin, A. G. Kharlamov, L. V. Kardapoltsev, D. P. Kovrizhin, A. A. Korol, A. S. Kupich, A. P. Kryukov, N. A. Melnikova, N. Yu. Muchnoi, A. E. Obrazovsky, E. V. Pakhtusova, K. V. Pugachev, S. I. Serednyakov, Z. K. Silagadze, I. K. Surin, D. A. Shtol, Yu. V. Usov, V. N. Zhabin","doi":"10.1134/S1063779624702356","DOIUrl":"10.1134/S1063779624702356","url":null,"abstract":"<p>The <span>({{e}^{ + }}{{e}^{ - }} to {{pi }^{ + }}{{pi }^{ - }}{{pi }^{0}})</span> process is studied in the energy range from 1.075 to 1.975 GeV on the basis of the data with an integrated luminosity of about 70 pb<span>(^{{ - 1}})</span> accumulated at the SND detector. The Dalitz plot distributions are fitted at each energy point using the model that includes the <span>(rho (770)pi )</span>, <span>(rho (1450)pi )</span>, and <span>(omega {{pi }^{0}})</span> intermediate states. Energy dependences of the cross sections for the intermediate states and the relative phases between amplitudes are obtained.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 3","pages":"820 - 826"},"PeriodicalIF":0.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}