{"title":"Electromagnetic form Factors and Radii of the Nucleon in the Extended Vector Meson Dominance Model","authors":"N. M. Levashko, K. S. Kuzmin, M. I. Krivoruchenko","doi":"10.1134/S1063778825700176","DOIUrl":"10.1134/S1063778825700176","url":null,"abstract":"<p>An extended vector meson dominance model is proposed for describing electromagnetic nucleon form factors. The model incorporates families of <span>(rho)</span>- and <span>(omega)</span>-mesons, including their excitations. Free parameters are determined through a global fit to experimental data for both space- and timelike momentum transfers. Meson masses and widths are set to empirical values, while residues at the poles of the ground-state <span>(rho)</span>- and <span>(omega)</span>-mesons align with findings from Frazer–Fulco unitarity relations and Bonn potential. The model adheres to constraints such as quark counting rules, the Okubo–Zweig–Iizuka rule, scaling relations for Sachs form factor at low and moderate momentum transfers, and suppression of Sachs form factors at the nucleon–antinucleon threshold. A good description is obtained for electromagnetic nucleon form factors across the experimentally accessible momentum range, as well as for the electric and magnetic radii, and Zemach radii of the nucleon.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"88 1","pages":"137 - 149"},"PeriodicalIF":0.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100163","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}
M. N. Achasov, A. Yu. Barnyakov, K. I. Beloborodov, A. V. Berdyugin, D. E. Berkaev, A. G. Bogdanchikov, A. A. Botov, V. S. Denisov, T. V. Dimova, V. P. Druzhinin, E. A. Eminov, L. B. Fomin, L. V. Kardapoltsev, A. A. Kattsin, A. G. Kharlamov, A. N. Kirpotin, I. A. Koop, A. A. Korol, D. P. Kovrizhin, A. P. Kryukov, A. S. Kupich, A. P. Lysenko, N. A. Melnikova, N. Yu. Muchnoy, A. E. Obrazovsky, E. V. Pakhtusova, E. A. Perevedentsev, K. V. Pugachev, Yu. A. Rogovsky, S. I. Serednyakov, Yu. M. Shatunov, D. A. Shtol, Z. K. Silagadze, I. K. Surin, M. V. Timoshenko, Yu. V. Usov, I. M. Zemlyansky, V. N. Zhabin, V. V. Zhulanov
{"title":"Measurement of the ({e^{+}e^{-}to}{pi^{+}pi^{-}2pi^{0}eta}) Cross Section below (sqrt{{s}}{=2}) GeV","authors":"M. N. Achasov, A. Yu. Barnyakov, K. I. Beloborodov, A. V. Berdyugin, D. E. Berkaev, A. G. Bogdanchikov, A. A. Botov, V. S. Denisov, T. V. Dimova, V. P. Druzhinin, E. A. Eminov, L. B. Fomin, L. V. Kardapoltsev, A. A. Kattsin, A. G. Kharlamov, A. N. Kirpotin, I. A. Koop, A. A. Korol, D. P. Kovrizhin, A. P. Kryukov, A. S. Kupich, A. P. Lysenko, N. A. Melnikova, N. Yu. Muchnoy, A. E. Obrazovsky, E. V. Pakhtusova, E. A. Perevedentsev, K. V. Pugachev, Yu. A. Rogovsky, S. I. Serednyakov, Yu. M. Shatunov, D. A. Shtol, Z. K. Silagadze, I. K. Surin, M. V. Timoshenko, Yu. V. Usov, I. M. Zemlyansky, V. N. Zhabin, V. V. Zhulanov","doi":"10.1134/S1063778825700012","DOIUrl":"10.1134/S1063778825700012","url":null,"abstract":"<p>The cross section for the <span>(e^{+}e^{-}topi^{+}pi^{-}2pi^{0}eta)</span> process is measured in the center-of-mass energy region 1.55–2 GeV for integrated luminosity 146 pb<span>({}^{-1})</span> collected by the SND detector at the VEPP-2000 <span>(e^{+}e^{-})</span> collider. The obtained cross section is fitted with the VMD model with <span>(rho(1700))</span> and <span>(rho(2150))</span> resonances.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"88 1","pages":"57 - 66"},"PeriodicalIF":0.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100191","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":"Description of Yrast States in ({}^{{76}})Ge","authors":"N. N. Arsenyev, E. V. Mardyban, T. M. Shneidman","doi":"10.1134/S1063778825700188","DOIUrl":"10.1134/S1063778825700188","url":null,"abstract":"<p>Systematic calculations of low-lying energy levels and <span>(B(E2))</span> transitions in the <span>({}^{76})</span>Ge nucleus are performed by diagonalization of the five-dimensional Bohr collective Hamiltonian with the microscopic input derived from a self-consistent mean-field calculation based on the multidimensional constrained covariant density functional theory. The relativistic functionals PC-PK1, NL3, and NL3<span>({}^{ast})</span> supplemented by a finite-range pairing force are used. The calculated properties of the yrast band show good agreement with available experimental data. Based on the analysis of energies of yrast states and the <span>(B(E2))</span> branching ratios the <span>({}^{76})</span>Ge isotope is a viable candidate for an asymmetric rotor description with <span>(gamma=30^{circ})</span>.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"88 1","pages":"26 - 31"},"PeriodicalIF":0.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100156","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. V. Derbin, I. S. Drachnev, D. V. Ivanov, V. N. Muratova, M. V. Trushin, E. V. Unzhakov, A. S. Vorobyev
{"title":"A New Precision Measurements of ({}^{{71}})Ge Lifetime","authors":"A. V. Derbin, I. S. Drachnev, D. V. Ivanov, V. N. Muratova, M. V. Trushin, E. V. Unzhakov, A. S. Vorobyev","doi":"10.1134/S1063778825700152","DOIUrl":"10.1134/S1063778825700152","url":null,"abstract":"<p>X-ray spectra of natural germanium sample irradiated in the fast neutron flux were measured using Si(Li)-detector during 4800 hours. The half-life of the <span>({}^{71})</span>Ge nucleus was evaluated to be <span>(T_{1/2}=11.4645pm 0.0036)</span> days that is consistent with the recent results whilst having a higher accuracy. The possibility of explaining the ‘‘gallium anomaly’’ due to a longer lifetime of <span>({}^{71})</span>Ge nucleus is therefore strictly rejected.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"88 1","pages":"52 - 56"},"PeriodicalIF":0.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100213","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":"Theoretical Study of the Transfer Reactions in the ({D{-}D}) System","authors":"A. S. Solovyev","doi":"10.1134/S1063778825600058","DOIUrl":"10.1134/S1063778825600058","url":null,"abstract":"<p>In this work, the transfer reactions proceeding in the <span>(d{-}d)</span> system, such as <span>(D(d,p)T)</span> and <span>(D(d,n){}^{3})</span>He, are studied by means of the microscopic multichannel cluster approach in the oscillator representation. Both reactions are of great interest for pure and applied physics. Their total and partial astrophysical <span>(S)</span> factors are calculated at low energies. The contributions of the different channels are discussed, and the most important ones are carefully analyzed. Manifestations of the nuclear tensor force in dynamics of the studied transfer processes are considered. A comparison of the results with experimental data demonstrates a good agreement.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"88 1","pages":"32 - 38"},"PeriodicalIF":0.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100215","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. Yu. Sidorenkov, A. A. Budzinskaya, A. N. Fazliakhmetov, V. N. Gavrin, D. S. Gursky, T. V. Ibragimova, B. K. Lubsandorzhiev, S. B. Lubsandorzhiev, A. D. Lukanov, D. A. Nanzanov, A. A. Shikhin, N. A. Ushakov, D. M. Voronin
{"title":"Measurements of Light Yield Quenching and ({}^{{14}})C Content in Liquid Scintillator of a 5-t Prototype of the Baksan Large Neutrino Telescope Project","authors":"A. Yu. Sidorenkov, A. A. Budzinskaya, A. N. Fazliakhmetov, V. N. Gavrin, D. S. Gursky, T. V. Ibragimova, B. K. Lubsandorzhiev, S. B. Lubsandorzhiev, A. D. Lukanov, D. A. Nanzanov, A. A. Shikhin, N. A. Ushakov, D. M. Voronin","doi":"10.1134/S1063778825700127","DOIUrl":"10.1134/S1063778825700127","url":null,"abstract":"<p>The light yield quenching of the liquid scintillator of 5-t prototype of Baksan Large Neutrino Telescope project was measured and the Birks parameter kB was determined to be 0.016 <span>({pm})</span> 0.001 cm MeV<span>({}^{-1})</span>. The <span>({}^{14})</span>C content of a LAB-based scintillator has been measured using the prototype with the scintillator mass of 0.5 t. The <span>({}^{14}textrm{C}/{}^{12})</span>C ratio has been obtained.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"88 1","pages":"101 - 104"},"PeriodicalIF":0.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100159","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":"Exclusive Semileptonic Decays of ({D}) Mesons into Orbitally Excited States of Strange Mesons","authors":"V. O. Galkin, I. S. Sukhanov","doi":"10.1134/S1063778825600204","DOIUrl":"10.1134/S1063778825600204","url":null,"abstract":"<p>Semileptonic decays of <span>(D)</span> mesons into orbitally excited states of strange mesons are studied in the framework of the relativistic quark model based on the quasipotential approach and quantum chromodynamics. Form factors parameterizing matrix elements of the weak current between meson states are calculated with the consistent account of relativistic effects. Their dependence on the square of the transferred momentum is explicitly determined in the whole accessible kinematic region. On the basis of these form factors and helicity formalism, differential and total semileptonic decay rates of <span>(D)</span> mesons are calculated. The detailed comparison of the obtained results with other theoretical calculations and experimental data is given.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"88 1","pages":"130 - 136"},"PeriodicalIF":0.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100196","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}
Yu. M. Gavrilyuk, A. M. Gangapshev, A. M. Gezhaev, V. V. Kazalov, V. V. Kuzminov
{"title":"Comparison of the ({}^{{213}})Po Half-Life Results Measured by Double and Triple Coincidence Methods","authors":"Yu. M. Gavrilyuk, A. M. Gangapshev, A. M. Gezhaev, V. V. Kazalov, V. V. Kuzminov","doi":"10.1134/S1063778825600216","DOIUrl":"10.1134/S1063778825600216","url":null,"abstract":"<p>Method of measurement and result of processing of the <span>({}^{213})</span>Po <span>(alpha)</span>-active isotope half-life data measured in long-run continuous measurement with the underground low-background TAU-3 set-up are described. The set-up consists of two scintillation NaI(Tl) <span>(150times 150)</span> mm<span>({}^{2})</span> detectors and double-layer (<span>(h_{textrm{layer}}=1)</span> mm) plastic scintillator detector (PCD) with <span>(d=18)</span> mm. Source of the <span>({dots}{}^{213}textrm{Bi}to{}^{213}textrm{Po})</span>… decays was placed between the PSD layers. The half-life was calculated from a decay curve. The curve was constructed from delay values between <span>(beta)</span>- and <span>(alpha)</span>-pulses detected by the PSD. Two methods were used for the event selection. The PSD pulses coincided in 16 mcs time window were selected in the first case (double coincidences). Additional pulse of the NaI detected <span>(gamma)</span>-quantum from the <span>({}^{213})</span>Bi decay was used in the second case for a validation of the <span>({}^{213})</span>Po birth and decay (triple coincidences). The values <span>(T_{1/2}=3.6970pm 0.0005)</span> mcs for the double coincidences and <span>(T_{1/2}=3.6812pm 0.0006)</span> mcs for the triple coincidences were obtained for <span>({}^{213})</span>Po half-life. Possible reasons of the result difference are discussed.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"88 1","pages":"11 - 15"},"PeriodicalIF":0.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100154","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":"Performance of the Electromagnetic Calorimeter ALICE/PHOS and Neutral Meson Production Results","authors":"Dmitry Averyanov, ALICE Collaboration","doi":"10.1134/S106377882560006X","DOIUrl":"10.1134/S106377882560006X","url":null,"abstract":"<p>The ALICE experiment at the LHC is designed to explore the properties of the quark–gluon plasma—hot and dense medium produced in ultrarelativistic heavy-ion collisions. The photon spectrometer (PHOS) of the ALICE experiment is a high-granularity electromagnetic PbWO<span>({}_{4})</span> crystal calorimeter which is intended to measure neutral meson spectra and direct photons in different colliding systems. We report an overview of the PHOS performance during Run 2 and Run 3 and present recent results from ALICE on the neutral meson measurements in pp and p–Pb collisions.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"88 1","pages":"90 - 95"},"PeriodicalIF":0.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100157","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. N. Goryachev, M. M. Kirsanov, F. N. Novoskoltsev, R. Yu. Sinyukov, A. A. Sokolov
{"title":"Sensitivity of the CP-Violation Phase Measurement in the Lepton Sector in the P2O Experiment","authors":"V. N. Goryachev, M. M. Kirsanov, F. N. Novoskoltsev, R. Yu. Sinyukov, A. A. Sokolov","doi":"10.1134/S1063778825700097","DOIUrl":"10.1134/S1063778825700097","url":null,"abstract":"<p>In the scope of the P2O (Protvino-to-ORCA) experiment it is planned to carry out experiments to determine the neutrino mass hierarchy and to search for the <i>CP</i>-violation in the lepton sector. Previously, various options of neutrino channels at the U-70 accelerator were considered for these experiments. In this paper, the neutrino beams formed in these channels are considered; their characteristics are compared. Different types of uncertainties in the experiment are examined, and their contributions to the measurement error of the <i>CP</i>-violation phase and their comparative analysis is carried out. This will allow further shaping the optimal architecture of planned long-baseline experiments (that is, determining the type and characteristics of the beam and detectors, as well as the required intensity of the experiment) at the qualitative level. In addition to that, in this work we calculate the sensitivity of the P2O experiment to the measurement of the <i>CP</i>-violation phase using each of the neutrino beams considered earlier. The choice of the optimal channel option, which allows ensuring the maximum sensitivity of the P2O experiment to the planned measurements, is performed.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"88 1","pages":"78 - 85"},"PeriodicalIF":0.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100190","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}