23 research outputs found
Self-identification of the lyrical subject in Russian poetry (a draft typology)
Get PDFThe end goal of this paper is to shed light on the changes in the lyrical subject self-identification logics that were characteristic of Russian poetry of the ‘modernist’ era. We are going to focus our attention exclusively on the poems with a lexically expressed I, which build the nucleus of the poetic fraction of literary texts and allow to get a clear idea about the mechanism of self-naming that we regard as fundamental for self-identification of the lyrical I.
The paper discriminates between the two methods of lyrical subject identification/self-identification: referring and attributing. Based on this, we suggest determining four basic functional incarnations of the lyrical subject in Russian poetry of the 18th–19th centuries, which are in part terminological reconsiderations of the conventional Russian philology categories. These incarnations are: 1) ‘anonymous’ lyrical I referring directly to the real author; 2) lyrical I referring to the author through the prism of in-text heteronymic or metonymic transcoding; 2) lyrical character (lyrical hero) referring to the author through the prism of metaphoric transcoding; 3) role character (role hero) with zero reference to the author.
The revolution that affected the strategies of lyrical self-identification in Russian poetry of the Silver Age manifested itself in some fundamental shifts. First of all, kaleidoscopic multiplication of lyrical I’s, both through the lyrics of specific poets and even within individual poems. Second, blurred boundaries between different incarnations of the lyrical subject that had been more or less clearly contrasted in poetry of the 19th century. Third, theatralization and problematization (to the extent of open conflicts) of the relationship between the author and his/her lyrical ‘doubles’
Radiative nonrecoil nuclear finite size corrections of order α(Zα)5 to the hyperfine splitting of S-states in muonic hydrogen
No full textAbstractOn the basis of quasipotential method in quantum electrodynamics we calculate nuclear finite size radiative corrections of order α(Zα)5 to the hyperfine structure of S-wave energy levels in muonic hydrogen and muonic deuterium. For the construction of the particle interaction operator we employ the projection operators on the particle bound states with definite spins. The calculation is performed in the infrared safe Fried–Yennie gauge. Modern experimental data on the electromagnetic form factors of the proton and deuteron are used
Strong decays of vector mesons to pseudoscalar mesons in the relativistic quark model
No full textAbstractStrong decays of vector (S13) mesons to the pair of pseudoscalar (S01) mesons are considered in the framework of the microscopic decay mechanism and the relativistic quark model based on the quasipotential approach. The quark–antiquark potential, which was previously used for the successful description of meson spectroscopy and electroweak decays, is employed as the source of the qq¯ pair creation. The relativistic structure of the decay matrix element, relativistic contributions and boosts of the meson wave functions are comprehensively taken into account. The calculated rates of strong decays of light, heavy-light mesons and heavy quarkonia agree well with available experimental data
Exclusive semileptonic decays of B mesons into light mesons in the relativistic quark model
No full textHyperfine structure of S-states of muonic tritium
No full textOn the basis of quasipotential method in quantum electrodynamics we carry out a precise calculation of hyperfine splitting of S-states in muonic tritium. The one-loop and two-loop vacuum polarization corrections, relativistic effects, nuclear structure corrections in first and second orders of perturbation theory are taken into account. The contributions to hyperfine structure are obtained in integral form and calculated analytically and numerically. Obtained results for hyperfine splitting can be used for a comparison with future experimental data of CREMA collaboration
Relativistic description of the double charmonium production in e+e− annihilation
No full textAbstractNew evaluation of the relativistic effects in the double production of S-wave charmonium states is performed on the basis of perturbative QCD and the relativistic quark model. The main improvement consists in the exact account of properties of the relativistic meson wave functions. For the gluon and quark propagators entering the production vertex function we use a truncated expansion in the ratio of the relative quark momenta to the center-of-mass energy s up to the second order. The exact relativistic treatment of the wave functions makes all such second order terms convergent, thus allowing the reliable calculation of their contributions to the production cross section. Compared to the nonrelativistic calculation we obtain a significant increase of the cross sections for the S-wave double charmonium production. This brings new theoretical results in good agreement with the available experimental data
Masses of excited heavy baryons in the relativistic quark–diquark picture
No full textAbstractThe mass spectra of the excited heavy baryons consisting of two light (u,d,s) and one heavy (c,b) quarks are calculated in the heavy-quark–light-diquark approximation within the constituent quark model. The light quarks, forming the diquark, and the light diquark in the baryon are treated completely relativistically. The expansion in v/c up to the second order is used only for the heavy (b and c) quarks. The internal structure of the diquark is taken into account by inserting the diquark–gluon interaction form factor. An overall good agreement of the obtained predictions with available experimental data is found
Exclusive semileptonic decays of B mesons to orbitally excited D mesons in the relativistic quark model
No full textHeavy quark contributions in semileptonic B decays to orbitally excited D mesons
No full textExclusive semileptonic decays of B mesons to orbitally excited D mesons are considered beyond the infinitely heavy quark limit in the framework of the relativistic quark model based on the quasipotential approach. This model agrees with the structure of heavy quark mass corrections predicted by the heavy quark effective theory and allows the determination of corresponding leading and subleading Isgur-Wise functions. It is found that both relativistic and 1/m_Q contributions significantly influence the decay rates. Thus, relativistic transformations of the meson wave functions (Wigner rotation of the light quark spin) already contribute at leading order of the heavy quark expansion and result in a suppression of B\to D^{*}_0e\nu and B\to D^{*}_1e\nu decay rates. On the other hand, the vanishing of the decay matrix elements at zero recoil of a final D^{**} meson in the infinitely heavy quark mass limit makes the 1/m_Q corrections to be very important, and their account results in a substantial enhancement of B\to D_1e\nu and B\to D^{*}_0e\nu decay rates.Exclusive semileptonic decays of B mesons to orbitally excited D mesons are considered beyond the infinitely heavy quark limit in the framework of the relativistic quark model based on the quasipotential approach. This model agrees with the structure of heavy quark mass corrections predicted by the heavy quark effective theory and allows the determination of corresponding leading and subleading Isgur-Wise functions. It is found that both relativistic and 1/m_Q contributions significantly influence the decay rates. Thus, relativistic transformations of the meson wave functions (Wigner rotation of the light quark spin) already contribute at leading order of the heavy quark expansion and result in a suppression of B\to D^{*}_0e\nu and B\to D^{*}_1e\nu decay rates. On the other hand, the vanishing of the decay matrix elements at zero recoil of a final D^{**} meson in the infinitely heavy quark mass limit makes the 1/m_Q corrections to be very important, and their account results in a substantial enhancement of B\to D_1e\nu and B\to D^{*}_0e\nu decay rates
Hyperfine structure of S-states of muonic tritium
No full textOn the basis of quasipotential method in quantum electrodynamics we carry out a precise calculation of hyperfine splitting of S-states in muonic tritium. The one-loop and two-loop vacuum polarization corrections, relativistic effects, nuclear structure corrections in first and second orders of perturbation theory are taken into account. The contributions to hyperfine structure are obtained in integral form and calculated analytically and numerically. Obtained results for hyperfine splitting can be used for a comparison with future experimental data of CREMA collaboration
