Zobrazeno 1 - 10
of 262
pro vyhledávání: '"Efimov, G. A."'
Autor:
Efimov, G. V.
Representation of the elastic scattering amplitude in the form of the path integral is obtained using the stationary Schroedinger equation. A few methods of evaluation of path integrals for large coupling constants are formulated. The methods are bas
Externí odkaz:
http://arxiv.org/abs/1305.5658
Autor:
Efimov, G. V.
The canonical quantization of the tachyon field is suggested. Quantization is based on the conception of stable and unstable components of the tachyon degrees of freedom.
Comment: 11 pages
Comment: 11 pages
Externí odkaz:
http://arxiv.org/abs/1202.2757
Autor:
Beck, C., Papka, P., Zafra, A. Sanchez i, Thummerer, S., Azaiez, F., Bednarczyk, P., Courtin, S., Curien, D., Dorvaux, O., Goasduff, A., Lebhertz, D., Nourreddine, A., Rousseau, M., Salsac, M. -D., von Oertzen, W., Gebauer, B., Wheldon, C., Kokalova, Tz., Efimov, G., Zherebchevsky, V., Schulz, Ch., Bohlen, H. G., Kamanin, D., de Angelis, G., Gadea, A., Lenzi, S., Napoli, D. R., Szilner, S., Milin, M., Catford, W. N., Jenkins, D. G., Royer, G.
Publikováno v:
Acta Phys.Polon.B42:747-756,2011
A great deal of research work has been undertaken in the alpha-clustering study since the pioneering discovery, half a century ago, of 12C+12C molecular resonances. Our knowledge of the field of the physics of nuclear molecules has increased consider
Externí odkaz:
http://arxiv.org/abs/1011.3423
Autor:
Efimov, G. V.
Bound state problem in the relativistic QED is investigated by the functional integral methods. The ortho- para- positron mass difference is calculated. Contribution of the "nonphysical"$~$ time variable turned out to be important and leads to the no
Externí odkaz:
http://arxiv.org/abs/1010.0144
Autor:
Efimov, G. V.
Binding energy of the $1^-$ state (ortho-positronium) in QED is calculated using the one-photon exchange Bethe-Salpeter equation in the Feynman and Coulomb gauges for different coupling constants $\alpha$. Calculations show there is a remarkable diff
Externí odkaz:
http://arxiv.org/abs/0805.4337
Autor:
Efimov, G. V.
Publikováno v:
FewBodySyst.40:131-143,2007
It is shown that in the framework of analytical confinement, when quark and gluon propagators are induced by an vacuum selfdual gluon field with constant strength, the masses of meson with quantum numbers $Q=J^P$ and quark constituents $m_1,~m_2$ are
Externí odkaz:
http://arxiv.org/abs/hep-ph/0512196
Autor:
Efimov, G. V.
Spectrum of masses of light pseudoscalar ($\pi, K, \eta, \eta'$) and vector ($\rho, K^*, \omega, \phi$) mesons can be explained on the base of the following assumptions: (1) analytical confinement (propagators of quarks and gluons are entire analytic
Externí odkaz:
http://arxiv.org/abs/hep-ph/0407186
Autor:
Efimov, G. V.
Publikováno v:
Few Body Syst. 33 (2003) 199-217
The Bethe-Salpeter (BS) equation in the ladder approximation is studied within a scalar theory: two scalar fields (constituents) with mass $m$ interacting via an exchange of a scalar field (tieon) with mass $\mu$. The BS equation is written in the fo
Externí odkaz:
http://arxiv.org/abs/hep-ph/0304194
Autor:
Burdanov, Ja. V., Efimov, G. V.
Using a simple relativistic QFT model of scalar fields we demonstrate that the analytic confinement (propagator is an entire function in the complex $p^2$--plane) and the weak coupling constant lead to the Regge behaviour of the two-particle bound st
Externí odkaz:
http://arxiv.org/abs/hep-ph/0209285
Autor:
Tokarev, M., Efimov, G.
The scaling properties of direct photon production in pp, barpp and pA collisions at high energies is reviewed. The experimental data on the cross sections obtained at ISR, SpS and Tevatron are used in the analysis. The properties of data z-presentat
Externí odkaz:
http://arxiv.org/abs/hep-ph/0209013