Physics of Atomic Nuclei最新文献

{"title":"Project of the Astrophysical Complex TAIGA-100","authors":"R. Monkhoev,&nbsp;I. Astapov,&nbsp;P. Bezyazeekov,&nbsp;A. Blinov,&nbsp;A. Bogdanov,&nbsp;E. Bonvech,&nbsp;A. Borodin,&nbsp;N. Budnev,&nbsp;A. Bulan,&nbsp;P. Busygin,&nbsp;A. Bykov,&nbsp;D. Chernov,&nbsp;A. Chiavassa,&nbsp;A. Dyachok,&nbsp;A. Gafarov,&nbsp;A. Garmash,&nbsp;V. Grebenyuk,&nbsp;E. Gress,&nbsp;O. Gress,&nbsp;T. Gress,&nbsp;A. Grinyuk,&nbsp;O. Grishin,&nbsp;A. D. Ivanova,&nbsp;A. L. Ivanova,&nbsp;M. Iliushin,&nbsp;I. Kabannik,&nbsp;N. Kalmykov,&nbsp;E. Kholupenko,&nbsp;V. Kindin,&nbsp;S. Kiryuhin,&nbsp;K. Kompaniets,&nbsp;E. Korosteleva,&nbsp;V. Kozhin,&nbsp;A. Krasilshchikov,&nbsp;E. Kravchenko,&nbsp;A. Kryukov,&nbsp;L. Kuzmichev,&nbsp;A. Lagutin,&nbsp;Yu. Lemeshev,&nbsp;B. Lubsandorzhiev,&nbsp;N. Lubsandorzhiev,&nbsp;A. Lukanov,&nbsp;S. Malakhov,&nbsp;R. Mirgazov,&nbsp;E. Osipova,&nbsp;A. Pakhorukov,&nbsp;L. Pankov,&nbsp;A. Pan,&nbsp;A. Panov,&nbsp;A. Petrukhin,&nbsp;I. Poddubny,&nbsp;V. Poleschuk,&nbsp;E. Popova,&nbsp;E. Postnikov,&nbsp;V. Prosin,&nbsp;A. Pushnin,&nbsp;R. Raikin,&nbsp;A. Razumov,&nbsp;G. Rubtsov,&nbsp;E. Ryabov,&nbsp;V. Samoliga,&nbsp;I. Satyshev,&nbsp;A. Silaev,&nbsp;A. Silaev Jr.,&nbsp;A. Sidorenkov,&nbsp;A. Skurikhin,&nbsp;A. Sokolov,&nbsp;L. Sveshnikova,&nbsp;A. Shaikovsky,&nbsp;M. Shulga,&nbsp;V. Tabolenko,&nbsp;A. Tanaev,&nbsp;M. Ternovoy,&nbsp;N. Ushakov,&nbsp;P. Volchugov,&nbsp;N. Volkov,&nbsp;D. Voronin,&nbsp;V. Zirakashvili,&nbsp;A. Zagorodnikov,&nbsp;D. Zhurov,&nbsp;I. Yashin","doi":"10.1134/S1063778826600181","DOIUrl":"10.1134/S1063778826600181","url":null,"abstract":"<p>The article discusses the astrophysical motivation for creating a large-scale facility with an area of 100 km<span>({}^{2})</span>, designed for research in the field of PeV-range gamma-ray astronomy and ultra-high-energy cosmic ray physics. As a possible experimental implementation of such a facility, the project of the astrophysical complex TAIGA-100 is considered. Its key elements are wide-angle atmospheric Cherenkov modules with a field of view of <span>({sim}1)</span> sr and water Cherenkov detectors with an area of <span>({sim}40)</span> m<span>({}^{2})</span>. Additionally, the complex is expected to include imaging atmospheric Cherenkov telescopes for sub-PeV gamma-ray astronomy, as well as scintillation counters, fluorescence detectors, and radio antennas for studying the flux of ultra-high-energy cosmic rays. To demonstrate the future facility’s effectiveness in addressing fundamental astrophysical tasks, it is planned to create a prototype with an area of <span>({sim}0.5)</span> km<span>({}^{2})</span>.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"89 1","pages":"11 - 16"},"PeriodicalIF":0.4,"publicationDate":"2026-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009570","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":"Rare Semileptonic Decays of ({Xi_{b}}) Baryons in Relativistic Quark Model","authors":"V. O. Galkin,&nbsp;A. O. Nemtyrev","doi":"10.1134/S1063778825602197","DOIUrl":"10.1134/S1063778825602197","url":null,"abstract":"<p>Considerable advances have been made over the past decades in experimentally studying the decays of hadrons containing heavy quarks. In particular, branching ratios were measured for exclusive semileptonic and rare decays of both beauty and charmed mesons and baryons. The results obtained in studying the rare semileptonic decays <span>(Xi_{b}^{-}rightarrowXi^{-}l^{+}l^{-})</span>, and <span>(Xi_{b}^{0}rightarrowLambda l^{+}l^{-})</span>, are given in the present article. Form factors that parametrize the weak-current matrix elements between baryon states are calculated in the relativistic quark model based on the quasipotential approach and quantum chromodynamics. The differential and total decay widths, as well as asymmetries and polarization characteristics of the decays, are calculated on the basis of the helicity formalism. The calculations are performed both with and without the inclusion of the long-range contribution of charmonium vector resonances to Wilson coefficients. Predictions for decay widths are obtained for three lepton generations.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"89 1","pages":"101 - 113"},"PeriodicalIF":0.4,"publicationDate":"2026-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009573","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":"Scientific Results of the Nucleon Experiment","authors":"A. N. Turundaevskiy,&nbsp;D. E. Karmanov,&nbsp;I. M. Kovalev,&nbsp;I. A. Kudryashov,&nbsp;A. A. Kurganov,&nbsp;A. D. Panov,&nbsp;D. M. Podorozhny","doi":"10.1134/S1063778826600168","DOIUrl":"10.1134/S1063778826600168","url":null,"abstract":"<p>The NUCLEON space experiment was carried out for three years. During the experiment, the charge composition and energy spectra of cosmic rays in the region of 2–500 TeV were measured. At the same time, a number of features that were not predicted by previously developed models of acceleration and propagation of cosmic rays were found to be of sufficiently high statistical significance. It turned out that the spectrum of rare odd nuclei (<span>(Z=9{-}19)</span>) is more rigid than the spectrum of abundant even nuclei (<span>(Z=10{-}20)</span>) in the field of magnetic rigidity of 300–10000 GV. Also, an analysis of the results of the NUCLEON experiment showed that in the source there is a systematic dependence of the spectral index on the nuclei charge. A possible explanation is the incomplete ionization of cosmic rays during their acceleration at the front of the supernova shock wave. An anisotropic diffusion model is also considered. Further astrophysical analysis of the NUCLEON experiment data is necessary in comparison with the data of other experiments.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"89 1","pages":"8 - 10"},"PeriodicalIF":0.4,"publicationDate":"2026-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009580","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":"Measurement of Cross Sections of Reactions ({}^{191})Ir(({{p},{pxn}}))({}^{189,190})Ir,({}^{193})Ir(({{p},{pn}}))({}^{192})Ir, and ({}^{191})Ir(({{p},{xn}}))({}^{188,189})Pt and Cumulative Cross Sections of Reactions ({}^{191})Ir(({{p},{n}}))({}^{191}textrm{Pt}+{}^{193})Ir(({{p},3{n}}))({}^{191})Pt during Irradiation of Natural Iridium Target with ({}^{1})H Nuclei","authors":"T. M. Fazliev,&nbsp;R. A. Aliev,&nbsp;V. A. Zagryadskiy,&nbsp;E. S. Kormazeva,&nbsp;T. M. Kuznetsova,&nbsp;T. Yu. Malamut,&nbsp;V. I. Novikov,&nbsp;I. N. Popov","doi":"10.1134/S1063778826600065","DOIUrl":"10.1134/S1063778826600065","url":null,"abstract":"<p>This article addresses measurement of the cross sections of the reactions <span>({}^{191})</span>Ir(<span>(p,pn)</span>)<span>({}^{190})</span>Ir, <span>({}^{193})</span>Ir(<span>(p,pn)</span>)<span>({}^{192})</span>Ir, <span>({}^{191})</span>Ir(<span>(p,4n)</span>)<span>({}^{188})</span>Pt, <span>({}^{191})</span>Ir(<span>(p,3n)</span>)<span>({}^{189})</span>Pt, and <span>({}^{191})</span>Ir(<span>(p,p2n)</span>)<span>({}^{189})</span>Ir and the cumulative cross section of the reaction <span>({}^{193})</span>Ir(<span>(p,3n)</span>)<span>({}^{191}textrm{Pt}+{}^{191})</span>Ir(<span>(p,n)</span>)<span>({}^{191})</span>Pt in the proton energy range of 29.6–17.2 MeV during proton irradiation of a target of natural metal iridium on the U-150 cyclotron of the National Research Center (NRC) Kurchatov Institute. The experimental cross sections of the reactions were compared with data of TENDL-2023. The results of this study make it possible to evaluate the effectiveness of the production of the target radioisotope <span>({}^{189})</span>Ir, a precursor in a <span>({}^{189}textrm{Ir}/{}^{189m})</span>Os isotope generator of an Auger emitter and conversion electrons from <span>({}^{189m})</span>Os, which can be used as a low-dose therapeutic agent in nuclear medicine. Experimental cross sections of the formation of accompanying radionuclide impurities enable development of an optimal radiochemical technique for release of the radioisotope <span>({}^{189})</span>Ir from a proton-irradiated iridium target.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"89 1","pages":"1 - 7"},"PeriodicalIF":0.4,"publicationDate":"2026-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148010016","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":"Quantization of Massive Fermions in Vacuum and External Fields","authors":"Maxim Dvornikov","doi":"10.1134/S106377882660003X","DOIUrl":"10.1134/S106377882660003X","url":null,"abstract":"<p>We study massive Majorana neutrinos in background matter. Representing these particles in terms of Weyl spinors, we carry out their quantization. The propagators of these fields are also constructed. Then, we apply the Hamilton dynamics based formalism to describe massive Majorana neutrinos in matter on the classical level. Finally, we study a classical Dirac particle in vacuum, described with <span>(c)</span>-number variables, within the Hamilton formalism. Such a Dirac field is also canonically quantized.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"89 1","pages":"121 - 127"},"PeriodicalIF":0.4,"publicationDate":"2026-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009571","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":"Simulation of Gamma-Ray Burst Signals and Extended Source Detection with the Ground-Based TAIGA-IACTs Facility","authors":"A. Yu. Razumov,&nbsp;E. B. Postnikov,&nbsp;I. I. Astapov,&nbsp;P. A. Bezyazeekov,&nbsp;A. V. Blinov,&nbsp;A. N. Borodin,&nbsp;E. A. Bonvech,&nbsp;N. M. Budnev,&nbsp;A. V. Bulan,&nbsp;P. V. Busygin,&nbsp;P. A. Volchugov,&nbsp;N. V. Volkov,&nbsp;D. M. Voronin,&nbsp;A. R. Gafarov,&nbsp;E. O. Gress,&nbsp;O. A. Gress,&nbsp;T. I. Gress,&nbsp;O. G. Grishin,&nbsp;A. Yu. Garmash,&nbsp;G. S. Goman,&nbsp;V. M. Grebenyuk,&nbsp;A. A. Grinyuk,&nbsp;A. N. Dyachok,&nbsp;D. P. Zhurov,&nbsp;A. V. Zagorodnikov,&nbsp;V. N. Zirakashvili,&nbsp;A. D. Ivanova,&nbsp;A. L. Ivanova,&nbsp;M. A. Iliushin,&nbsp;N. N. Kalmykov,&nbsp;V. V. Kindin,&nbsp;S. N. Kiryuhin,&nbsp;K. G. Kompaniets,&nbsp;E. E. Korosteleva,&nbsp;V. A. Kozhin,&nbsp;E. A. Kravchenko,&nbsp;A. P. Kryukov,&nbsp;L. A. Kuzmichev,&nbsp;A. Chiavassa,&nbsp;A. A. Lagutin,&nbsp;Yu. E. Lemeshev,&nbsp;B. K. Lubsandorzhiev,&nbsp;N. B. Lubsandorzhiev,&nbsp;A. D. Lukanov,&nbsp;S. D. Malakhov,&nbsp;R. R. Mirgazov,&nbsp;R. D. Monkhoev,&nbsp;E. A. Okuneva,&nbsp;E. A. Osipova,&nbsp;A. L. Pakhorukov,&nbsp;A. Pan,&nbsp;A. D. Panov,&nbsp;L. V. Pankov,&nbsp;A. A. Petrukhin,&nbsp;D. A. Podgrudkov,&nbsp;I. A. Poddubny,&nbsp;E. G. Popova,&nbsp;V. V. Prosin,&nbsp;A. A. Pushnin,&nbsp;R. I. Raikin,&nbsp;G. I. Rubtsov,&nbsp;E. V. Ryabov,&nbsp;V. S. Samoliga,&nbsp;I. Satyshev,&nbsp;A. A. Silaev,&nbsp;A. A. Silaev Jr.,&nbsp;A. Yu. Sidorenkov,&nbsp;A. V. Skurikhin,&nbsp;L. G. Sveshnikova,&nbsp;A. V. Sokolov,&nbsp;V. A. Tabolenko,&nbsp;A. B. Tanaev,&nbsp;M. Yu. Ternovoy,&nbsp;N. A. Ushakov,&nbsp;D. V. Chernov,&nbsp;A. V. Shaikovsky,&nbsp;I. I. Yashin","doi":"10.1134/S1063778826600193","DOIUrl":"10.1134/S1063778826600193","url":null,"abstract":"<p>The research program of the TAIGA-IACT facility, a component of the TAIGA astrophysical complex, includes the study of a number of extended gamma-ray sources and the search for TeV-energy gamma rays from gamma-ray bursts. This paper presents simulations of the detection of high-energy gamma-ray radiation using the TAIGA-IACT Cherenkov telescopes for the GRB 221009A event and for extended gamma-ray sources of realistic angular size in the telescope camera. The single-telescope effective area for detecting TeV gamma rays from gamma-ray bursts is estimated, and the TAIGA-IACT sensitivity for extended source detection is calculated.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"89 1","pages":"17 - 24"},"PeriodicalIF":0.4,"publicationDate":"2026-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009574","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":"Dimuon Physics with the CMS Experiment at the LHC","authors":"A. V. Lanyov","doi":"10.1134/S1063778826600132","DOIUrl":"10.1134/S1063778826600132","url":null,"abstract":"<p>We present an overview of recent results from the CMS collaboration on the dimuon physics at the proton–proton collisions at the LHC, beginning with the precision measurements of Drell–Yan differential cross sections and rare processes, and extending into the search for narrow heavy resonances and other effects beyond the standard model.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"89 1","pages":"54 - 61"},"PeriodicalIF":0.4,"publicationDate":"2026-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009576","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":"Time Structure of Extensive Air Showers with Energies ({10^{15}{-}10^{16}}) eV Based on Horizon-T Facility Data at the Tien Shan High-mountain LPI Station","authors":"E. A. Beisembaeva,&nbsp;A. M. Anokhina,&nbsp;V. S. Aseikin,&nbsp;K. A. Baygarin,&nbsp;Y. V. Verminskaya,&nbsp;M. I. Vildanova,&nbsp;V. V. Zhukov,&nbsp;V. A. Ryabov,&nbsp;M. A. Samoilov,&nbsp;T. Kh. Sadykov,&nbsp;A. L. Shepetov","doi":"10.1134/S1063778826600120","DOIUrl":"10.1134/S1063778826600120","url":null,"abstract":"<p>The Horizon-T facility at the Tien Shan station of the Lebedev Physical Institute records extensive air showers (EAS) with energies above <span>(10^{16})</span> eV, while the central detector group can study cosmic rays of lower energies: <span>(10^{15}leq Eleq 10^{16})</span> eV. In this paper, the time characteristics of experimental EAS events and those simulated using CORSIKA-77500 are compared. The authors conclude that the QGSJETII-04 hadronic interaction model and the EAS development scenarios used in CORSIKA in the energy range under consideration contradict the time properties of EAS registered by the Horizon-T central detectors.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"89 1","pages":"38 - 45"},"PeriodicalIF":0.4,"publicationDate":"2026-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009577","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":"Anomalous Dimensions of dim({=3}) Operators in Asymptotically Safe Model","authors":"Alfiia Mukhaeva","doi":"10.1134/S1063778826600041","DOIUrl":"10.1134/S1063778826600041","url":null,"abstract":"<p>In this paper, we investigate four-dimensional <span>(SU(N_{c}))</span> renormalizable gauge-Yukawa theory which exhibits Asymptotic Safety. We give the results for interacting ultraviolet fixed points, critical exponents and anomalous dimensions for <span>(textrm{dim}=3)</span> operators for finite number of colors <span>(N_{c})</span> at 2-loop for gauge, 1-loop for Yukawa and scalar fields.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"89 1","pages":"128 - 132"},"PeriodicalIF":0.4,"publicationDate":"2026-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009578","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":"Search for Dark Matter Mediators Using Spin Correlations in Single Top Quark Production Processes","authors":"Eduard Boos,&nbsp;Viacheslav Bunichev,&nbsp;Lev Dudko","doi":"10.1134/S1063778826600211","DOIUrl":"10.1134/S1063778826600211","url":null,"abstract":"<p>Differential cross-sections characterizing spin correlations in the processes of associative production of dark matter and a single top quark at the Large Hadron Collider were obtained. An analysis of processes involving scalar, pseudoscalar and vector mediator particles in the cluster system corresponding to the decay products of the top quark and mediator is carried out.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"89 1","pages":"69 - 74"},"PeriodicalIF":0.4,"publicationDate":"2026-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009685","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}