The contribution of axial-vector mesons to hyperfine structure of muonic hydrogen

The contribution from the axial-vector meson exchange to the potential of the muon-proton interaction in muonic hydrogen induced by anomalous axial-vector meson coupling to two photon state is calculated. It is shown that such contribution to the hyperfine splitting in muonic hydrogen is large and important for a comparison with precise experimental data. In the light of our result, the proton radius "puzzle" is discussed.Comment: 14 pages, 2 figure

Relativistic effects in the production of pseudoscalar and vector doubly heavy mesons from e^+e^- annihilation

On the basis of the perturbative QCD and the relativistic quark model we investigate the relativistic and bound state effects in the production processes of a pair of $S$-wave doubly heavy mesons with opposite charge conjugation consisting of $b$ and $c$ quarks. All possible relativistic corrections in the production amplitude including the terms connected with the transformation law of the bound state wave function to the reference frame of the moving pseudoscalar ${\cal P}-$ and vector ${\cal V}-$ mesons are taken into account. We obtain a growth of the cross section for the reaction $e^++e^-\to J/\Psi+ \eta_c$ due to considered effects by a factor $2\div 2.5$ in the range of the center-of-mass energy $\sqrt{s}=6\div 12$ GeV.Comment: 18 pages, 4 figure

Future of Augmented Reality

Today virtual reality is very popular, but it is used mostly for entertainment. In future augmented reality referred to as the integration of digital information with the user's environment in real time will be the most popular thing in the world. Referring to these definitions, unlike virtual reality, which creates a totally artificial environment, augmented reality uses the existing environment and overlays new information on the top. By this way our life can become more interesting and informative. With the help of advanced AR technology (e.g. adding computer vision and object recognition) the information about the surrounding real world of the user becomes interactive and digitally manipulated information about the environment and its objects is overlaid in the real world

Proton polarizability effect in the hyperfine splitting of the hydrogen atom

The contribution of the proton polarizability to the ground state hyperfine splitting in the hydrogen atom is evaluated on the basis of isobar model and evolution equations for the parton distributions. The contributions of the Born terms, vector meson exchanges and nucleon resonances are taken into account in the construction of the proton polarized structure functions $g_{1,2}(W,Q^2)$. Numerical values of this effect are equal $(2.2\pm 0.8)\times 10^{-6}$ times the Fermi splitting in electronic hydrogen and $(4.70\pm 1.04)\times 10^{-4}$ times the Fermi splitting in muonic hydrogen.Comment: 11 pages, 5 figure

The Future of Programming

Nowadays digital literacies are one of the requirements to employees in various areas of human activities, where programming which belongs to computer sciences is seen as a bonus when applying for a job. Some predictions how programming will develop in future are given in this paper

Energy levels of mesonic helium in quantum electrodynamics

On the basis of variational method we study energy levels of pionic helium $(\pi-e-He)$ and kaonic helium $(K-e-He)$ with an electron in ground state and a meson in excited state with principal and orbital quantum numbers $n\sim l+1\sim 20$. Variational wave functions are taken in the Gaussian form. Matrix elements of the basic Hamiltonian and corrections to vacuum polarization and relativism are calculated analytically in a closed form. We calculate some bound state energies and transition frequencies which can be studied in the experiment.Comment: 12 pages, 6 figure

Contribution of hadronic light-by-light scattering to the hyperfine structure of muonium

The contribution of hadronic scattering of light-by-light to the hyperfine structure of muonium is calculated using experimental data on the transition form factors of two photons into a hadron. The amplitudes of interaction between a muon and an electron with horizontal and vertical exchange are constructed. The contributions due to the exchange of pseudoscalar, axial vector, scalar and tensor mesons are taken into account.Comment: 13 pages, 1 figur