Erratum

Abstract Preliminary results of measurement of the cross section for the process \(e^{+}e^{-}\to K^{+}K^{-}\) in the range of c.m. energies between 1.075 and 1.975 GeV are presented. An analysis was performed on the basis of an integrated luminosity of 62.9 pb\({}^{-1}\) accumulated by employing the CMD-3 detector within the experimental runs of 2019. The suppression of the background from the processes

Abstract Based on the behavior of elastic scattering of proton and anti-proton at \(\sqrt{s}=1.96\) TeV for squared four-momentum transfer \(0.26<{-}t<1.2(\)GeV\(/c)^{2}\), form factor of proton is predicted. Simplest version of Chou–Yang model is employed for extracting this form factor by fitting experimental data of differential cross section from D0 experiment to a single Gaussian. Root mean square

Abstract The coherent photoproduction of \(\pi^{0}\pi^{0}\) and \(\pi^{0}\eta\) on nuclei in the mass-number region of \(A\leqslant 7\) is studied systematically over the range between the threshold and the laboratory photon energy of \(E_{\gamma}=2\) GeV. The amplitude for photoproduction on nuclei is constructed on the basis of the impulse approximation with allowance for a number of processes responsible

Abstract New experimental data on the multifragmentation of carbon nuclei that is initiated by the photoproduction of neutral pions and eta mesons are discussed. The novelty is associated with the exclusive character of the processes being studied, in which case a determination of partial meson-photoproduction reactions is followed by an analysis of complementary particles for coincidence. The experiment

Abstract \(\alpha\) decay of 2000 parent heavy and superheavy nuclei, with atomic numbers in the range \(Z=80\) to \(Z=122\), is considered. We calculated the half-life time, \(T_{\alpha}\), of each nucleus using the density-dependent cluster model with M3Y-effective nucleon–nucleon interaction. The \(Q_{\alpha}\) values needed for calculation of \(T_{\alpha}\) were extracted from four different mass

Abstract The results of experimental investigations devoted to initiating the promising nuclear fusion reaction \({}^{11}\)B\((p,3\alpha)\) in picosecond laser plasmas at a laser-radiation intensity of \(5\times 10^{18}\) W/cm\({}^{2}\) are presented. A new tool for determining the absolute yield of alpha particles in the reaction \({}^{11}\)B\((p,3\alpha)\) on the basis of simultaneously measuring

Abstract The results of searches for the process \(e^{+}e^{-}\to\eta^{\prime}\gamma\) in an experiment with the SND detector at the VEPP-2000 electron–positron collider are presented. The data used in these searches and based on an integrated luminosity of about 87 pb\({}^{-1}\) were accumulated at c.m. energies \(\sqrt{s}\) between 1.15 and 2 GeV. The upper limits of \(\sigma_{\eta^{\prime}\gamma}<28\)

Abstract An extended microscopic version of the interacting-boson model is developed. The properties of yrast-band states in even cerium isotopes up to the spin–parity of \(I^{\pi}=18^{+}\) are calculated on the basis of this model. These spin values include those at which band crossing occurs. The model parameters are calculated on the basis of employing an average spherical potential and residual

Abstract A flavor model based on \(A_{4}\) modular group is proposed. We consider the inverse seesaw mechanism to produce the light neutrino masses. Both neutrino and charged lepton masses are obtained in terms of Yukawa coupling ratios and the module \(\tau\) of the \(A_{4}\) modular form. The calculated lepton parameters (masses and mixings) are in good agreement with the recent neutrino data. The

Abstract Processes involving the ionization of atomic shells and x-ray transitions in daughter nuclei and accompanying alpha decay of superheavy isotopes are considered. The probabilities for \(N\)-shell ionization during the decay of isotopes entering into the tennessine (\({}^{294}_{117}\)Ts) and oganesson (\({}^{294}_{118}\)Og) alpha-decay chains are calculated. The Dirac–Fock method is used, and

Abstract An effective approximation to a fully self-consistent global description of beta-decay properties of nuclei within the theory of finite Fermi systems is presented. It is based on describing the ground state properties within the energy density functional proposed by Fayans and coauthors (DF3) and on the continuum quasiparticle random-phase approximation (CQRPA). The accuracy of global DF3

Abstract We propose an idea that the observed CP violation in neutrino oscillation is originated from the phase in right-handed neutrino mixing by seesaw mechanism. We add small breaking terms \(M_{ij}N_{R_{i}}N_{R_{j}}\) in the model based on \(A_{4}\) symmetry to generate non-diagonal right-handed neutrino mixing, which will give a small correction to TBM mixing via seesaw mechanism with nonzero

Abstract The core deformation of a one- and two-proton halo \({}^{27}\)S nucleus was investigated based on experimental data. The Hamiltonian of the three-body systems and the root-mean-square (RMS) matter radii were used to calculate the theoretical value. The calculated theoretical value was analyzed using the relationship of the core deformation parameter (\(\beta_{2}\)) with the binding energy

Abstract We present an analytic calculation of Branching Ratio (BR) and Charge–Parity (CP) violating asymmetries of the \(B_{s}^{0}\)-meson decay into the two light vectors \(\rho^{0}\phi\). In doing this we calculate the helicity amplitude of the present decay in the framework of QCD factorization approach. We find the BR of \(B_{s}^{0}\rightarrow\rho^{0}\phi=(0.26\pm 0.04)\times 10^{-6}\) which is

Abstract The results of a combined description of data on the differential and total scattering cross sections and the \(\rho\)-parameter for \(p(\bar{p})p\) collisions in tuning the parameters of an analytic model constructed in order to describe data over a broad region of kinematical variables for \(\sqrt{s}\gtrsim 7\) GeV and all currently available experimental data on \(t\) are presented. The

Abstract The thick target inverse kinematics (TTIK) approach was used to measure excitation functions for the elastic \({}^{17}\)O (\(\alpha,\alpha\)) scattering at the initial \({}^{17}\)O beam energy of 54.4 MeV. We observed strong peaks corresponding to highly excited \(\alpha\)-cluster states in the \({}^{21}\)Ne excitation energy region of 8–16 MeV, which have never been investigated before. Additional

Abstract The energy spectrum of primary cosmic rays at energies between 2\(\times 10^{13}\) and 3\(\times 10^{17}\) eV is presented according to data from the Tien Shan array on the basis of the detection of the number of electrons in extensive air showers. In the energy range of \(5\times 10^{15}{-}3\times 10^{17}\) eV, the spectrum was obtained by means of the HADRON array and was extended to the

Abstract Nuclear reactions and decays belonging to a new class referred to as a virtual class since virtual intermediate states of \(A\geqslant 2\) atomic nuclei at off-shell energies are involved in the amplitude of the widths with respect to such processes are studied by considering examples of two-proton and double-beta decays of nuclei, as well as spontaneous ternary fission of even–even actinide

Abstract Examples of phase transitions occurring in atomic nuclei in response to an increase in the excitation energy and angular momenta and in response to a change in the number of nucleons are considered. The possibility of describing such transitions within collective models based on a Hamiltonian that depends on a relatively small number of dynamical variables is demonstrated.

Abstract The values calculated for the electron-to-positron conversion coefficients in a form differential with respect to the energy of product positrons and with respect to the solid angle of their emission, this being the most important feature of positron production in thick converter targets, are analyzed and are compared with relevant experimental data. This analysis is performed for a needle-like

Abstract The weighted-average cross sections for \({}^{179m2}\)Hf and \({}^{180m}\)Hf population in (\(\gamma,\gamma^{\prime}\)) reactions induced by gamma rays of bremsstrahlung spectrum with endpoint energies of 17.5, 37, and 55 MeV were measured for the first time. A second maximum in the excitation function for the \(K\) forbidden isomers of \({}^{179}\)Hf and \({}^{180}\)Hf was found in the energy

Abstract It is generally accepted that neutrinoless double electron capture is a resonance process. The probability for the shake followed by electron-shell ionization occurring in the course of transformation of \({}^{152}\)Gd nuclei is calculated. Among all known nuclei, this nuclide is characterized by the lowest resonance defect and is therefore thought to be one of the main candidates for use

Abstract The rate of neutron-induced nucleosynthesis of heavy nuclei is determined by the astrophysical scenario and by the rate of beta decay of nuclei involved in the r-process. The effect of beta-decay rates calculated within various theoretical models on the abundances of heavy nuclei is analyzed on the basis of the yields of heavy nuclei in the r-process and the determination of their sensitivity

Abstract By employing the \(T\)-invariance condition for the amplitudes describing arbitrary binary nuclear reactions that involve spin-oriented particles and the respective time-reversed reactions, a relation between the differential cross sections for these reactions is obtained for the first time. These cross sections are determined with the aid of sets of potentials simulating the interaction between

Abstract The formalism of asymptotic normalization coefficients and methods for determining them from experimental nuclear data are discussed. A new method is proposed that uses the continuation of the modulus squared of a partial-wave amplitude. It is shown that the recently proposed \(\Delta\) method for the continuation of elastic scattering data is not strictly correct. It is argued that, unlike

Abstract Centroid energies, \(E_{\textrm{CEN}}\), of the isoscalar (\(T=0\)) and isovector (\(T=1\)) giant resonances of multipolarities \(L_{m}=0\)–3 in \({}^{\mathrm{40,48}}\)Ca, \({}^{\mathrm{68}}\)Ni, \({}^{\mathrm{90}}\)Zr, \({}^{\mathrm{116}}\)Sn, \({}^{\mathrm{144}}\)Sm, and \({}^{\mathrm{208}}\)Pb, were calculated within the fully self-consistent spherical Hartree–Fock (HF)-based random-phase

Abstract The \({}^{1}S_{0}\) neutron–neutron (\(nn\)) scattering length was measured in the neutron–deuteron (\(nd\)) breakup reaction at an energy of 60 MeV. The respective experiment was performed in the geometry of final-state interaction via detecting all three secondary particles. The scattering-length value of \(a_{nn}={-}16.3\pm 0.5\) fm was determined on the basis of a comparison of the experimental

Abstract A great many experimental studies devoted to exploring in detail the properties of radioactive decay of the isotopes of transfermium elements by means of alpha, beta, and gamma spectroscopy have been performed over the past fifteen years at the Flerov Laboratory of Nuclear Reactions (Joint Institute for Nuclear Research, Dubna). High-intensity accelerated heavy-ion beams of \({}^{22}\)Ne,

Abstract Fully self-consistent framework for isobaric-analog resonances is presented. The chains of parent neutron-rich Ca, Ni, Sn nuclei around the neutron shells at \(N=20\), \(28\), \(34\), \(50\), \(82\), as well as the nuclei on the neutron-deficient side of these chains are treated in the Density Functional plus Continuum Quasi particle Random Phase Approximation (DF \(+\) CQRPA). The recently

Abstract Quasi-elastic, multi-nucleon transfer reactions induced by the radioactive-ion beams with energy 4–6 MeV/u allow one to produce moderately excited neutron-rich nuclei with atomic numbers \(95

Abstract The propagation of thermal neutrons through media characterized by different degrees of ordering is analyzed. It is shown that the standard Fermi pseudopotential concept should be modified in order to obtain a unified description of thermal-neutron propagation in crystalline and amorphous media. It is found that satisfactory results are obtained upon employing a pseudopotential that correctly

Abstract Spectrum, radii, radial wave functions at origin, decay constants, and momentum widths for radial and orbital excited \(B_{c}\) mesons are derived within non-relativistic quark model framework through finding numerical solution of the Schrödinger equation by shooting method. Masses of orbitally excited states are derived with a much simpler method that is developed by combining the uncertainty

Abstract The article presents a review of resonance reaction studies made by TTIK method.

Abstract A hydrodynamic approach involving a nonequilibrium equation of state is used in describing heavy-ion collisions at medium and intermediate energies. The double differential cross sections for proton and photon emission in collisions of various nuclei are calculated in developing this approach with allowance for nuclear-viscosity effects and amendments introduced by the microcanonical distribution

Abstract For the success the synthesis of superheavy elements \(Z>118\), it is indispensable to clarify the fusion–fission mechanism, which includes a role of the nuclear structure of colliding nuclei and the deformation in the fusion process. We develop the dynamical model to estimate the probability to produce new superheavy nuclei. To approach Island of Stability and synthesize new elements, we

Erratum

Abstract A new family of high accuracy multitracking detectors called TRASGOs, sensitive to both electrons and muons is proposed for multidisciplinary cosmic ray research. The corresponding tools for monitoring, tracking, event reconstruction and analysis are being developed. The present status of the project is presented and discussed.

Abstract New relativistic semiclassical quantization conditions are obtained for a system of two equal-mass fermions interacting via nonsingular confining quasipotentials and quasipotentials of the funnel type. The quantization conditions are specified in the pseudoscalar, pseudovector, and vector cases. The respective analysis is performed within the Hamiltonian formulation of quantum field theory

Abstract In this work we derive analytically a real \(\alpha+\alpha\) potential using the JLM effective nucleon–nucleon (NN) interaction. The aim is to obtain analytically self-energy dependent \(\alpha+\alpha\) effective interaction. We used two different overlapping local density approximations, (geometrical and arithmetic averages, respectively) in JLM parameterization. The derived real potentials

Abstract The reaction induced by the inelastic scattering of 14.1-MeV neutrons on chromium nuclei is studied by means of the tagged-neutron method at the TANGRA (TAgged Neutrons and Gamma RAys) facility deployed at Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, and based on the ING-27 standard neutron generator. The energies of visible gamma transitions occurring in various

Abstract The seesaw mechanism, which explains the smallness of the neutrino masses by the involvement of high Majorana masses, leads to particles of the same Majorana nature and to a direct violation of the lepton number. A seesaw version entailing the appearance of only Dirac neutrinos subjected to the same kind of violation is proposed. Such a situation seems possible for heavy neutrinos coupled

Abstract The effect of photobeta decay and inverse internal bremsstrahlung on natural neutron beta decay is studied. These two processes make it possible to take into account the effect of the thermal field of the medium on beta decay and complement the natural beta decay process involving the emission of leptons—an electron and an antineutrino. It is shown that, at room temperature, the thermal effect

Abstract The secondary proton polarization and differential cross sections of the (\(p,p^{\prime}\)) inelastic reaction on nuclei \({}^{9}\)Be and \({}^{90}\)Zr at the initial proton energy of 1 GeV were measured over a wide range of the scattered proton momenta at a laboratory angle of \(\Theta=21^{\circ}\). Scattered protons were detected by means of the magnetic spectrometer equipped with a polarimeter

Abstract Angular \(t\)–\(\gamma\) correlations measured earlier in the reaction \({}^{27}\)Al\((\alpha,t)^{28}\)Si(2\({}^{+}\)) occurring at \(E_{\alpha}=30.3\) MeV and leading to the formation of the final nucleus in the lowest excited state are analyzed theoretically. The experimental results being considered are compared with their counterparts calculated by the coupled-channel method for the proton-stripping

Abstract A total set of one-loop electroweak radiative corrections, including the contribution of the emission of real hard photons (hard-bremsstrahlung contribution), to observables of polarized Bhabha scattering is calculated. A numerical analysis of observed spatial and polarization asymmetries with allowance for electroweak corrections is performed for low-energy experiments of the Belle II type

Abstract The resonance structure of the charge-exchange strength function \(S(E)\) and its effect on the cross sections for solar-neutrino capture by \({}^{127}\)I nuclei are analyzed. Three types of isobaric resonances are studied within the self-consistent theory of finite Fermi systems. These are the giant Gamow–Teller resonance; the analog resonance; and the pygmy resonances, which lie lower. The

Abstract The results obtained by studying temporal distributions of particles of energy in excess of 5 GeV in extensive air showers (EAS) of energy above \(10^{15}\) eV at distances shorter than 200 m from the EAS axis with the aim of searches in data from the MSU EAS setup for delayed and advanced new particles that could arise in the interactions of primary cosmic rays in the Earth’s atmosphere are

Abstract The reaction mechanism for the decay of the hot and rotating compound system \({}^{88}\)Mo\({}^{*}\) formed in \({}^{48}\textrm{Ti}+^{40}\)Ca reaction and the time for the emission of outgoing fragments have been analyzed within the quantum-mechanical fragmentation theory based dynamical cluster-decay model, at three incident energies. The incident energy effects have been analyzed by comparing

Abstract A survey of experimental results on the level structure in the heavy helium isotope \({}^{6}\)He that were obtained in reactions induced by stopped pion absorption in \({}^{9}\)Be, \({}^{10,11}\)B, and \({}^{12}\)C light nuclei is presented. The respective measurements were performed on the low-energy pion channel of the accelerator at the Los Alamos National Laboratory (LANL) by means of

AbstractThe results of experiments performed at a high-resolution magnetic spectrometer (MAVR) are presented. The differential production cross sections for oxygen isotopes in the \({}^{18}\textrm{O}+^{181}\)Ta reaction at the projectile energy of 10 MeV per nucleon were measured at the MAVR facility. The yield of reaction products is analyzed theoretically in the finite-range distorted-wave Born approximation

AbstractThe semimicroscopic particle–hole dispersive optical model developed recently is applied to describing main properties of the Gamow–Teller and charge-exchange giant spin-monopole resonances in medium-heavy closed-shell nuclei. The description in question includes energy-averaged strength functions, projected transition densities, and partial branching ratios for direct single-nucleon decay

AbstractIn this brief review paper I outline the relevance of the single-particle states for the research in nuclear structure. They can be detected and studied by several experimental methods, like direct reactions, inelastic electron scattering, and so on. On the other hand, their properties are directly linked to the structure of nuclei and they can probe different aspects of the correlations that

AbstractWe review studies of vortical motion and the resulting global polarization of \(\Lambda\) and \(\bar{\Lambda}\) hyperons in heavy-ion collisions, in particular, within 3FD model. 3FD predictions for the global midrapidity polarization in the FAIR-NICA energy range are presented. The 3FD simulations indicate that energy dependence of the observed global polarization of hyperons in the midrapidity

AbstractLow energy \(M1\) excitations are studied within the Time Dependent Hartree–Fock–Bogoliubov (TDHFB) approach. The solution of TDHFB equations by the Wigner Function Moments method predicts three types of scissors modes. In addition to the conventional scissors mode, two new modes arise due to spin degrees of freedom. The lowest one generates a remarkable \(M1\) strength below the conventional

AbstractRecent results on Higgs boson production and decays in the ATLAS and CMS experiments at the LHC are reviewed. These results are based on data accumulated from 2015 to 2018 in studying proton–proton collisions at the c.m. energy of 13 TeV. The production cross sections for the Higgs boson are measured for four basic production mechanisms along with the branching ratios for its five decay modes

AbstractThe invariant cross sections for forward charged-hadron production at zero angle in carbon–carbon collisions at a beam kinetic energy of 19.6 GeV per nucleon were measured at the U-70 accelerator in an experiment performed with the aid of a combined spectrometer including beam line 22 and detectors of the modified FODS setup. The beam line rigidity was varied between 7 and 70 GeV/\(c\). The

AbstractThe present article reports on an analysis of the properties that gamma-ray families featuring a halo exhibit in the cores of extensive air showers (EAS). The events under analysis were obtained in the XREC (x-ray emulsion chambers) PAMIR experiment, and the properties of these events were studied at distances extending up to about 10 cm from the EAS axis with a resolution of approximately

AbstractAsymptotic expressions for one-loop electroweak radiative corrections to observables of polarized Bhabha scattering are obtained within the on-shell renormalization scheme. The results of a numerical analysis of relative one-loop electroweak corrections to the cross section and polarization asymmetry are reproduced at energies below and above the \(Z\) resonance. A successful comparison with

AbstractA Variational Monte-Carlo (VMC) method is employed to investigate the density dependence of the symmetry energy of isospin asymmetric nuclear matter. The realistic Urbana \(V\)14 nucleon–nucleon interaction potential of Lagaris and Pandharipande was used in the VMC calculations with addition of a phenomenological density-dependent term to simulate many-body interactions. The symmetry energy