arXiv subjects

Dmitry Borisyuk

Publications and source records attributed to Dmitry Borisyuk.

22 records · Page 2Linked to original sources

arXiv2006

Box diagram in the elastic electron-proton scattering

We present an evaluation of box diagram for the elastic $ep$ scattering with proton in the intermediate state. Using analytic properties of the proton form factors we express the amplitude via twofold integral, which involves the form factors in the space-like region only. Therefore experimentally measured form factors can be used in the calculations directly. The numerical calculation is done with the form factors extracted by Rosenbluth, as well as by polarization transfer methods. The dependence of the results on the form factor choice is small for $Q^2 < 6 GeV^2$, but becomes sizable at higher $Q^2$.

nucl-th↗

arXiv2005

Beam normal spin asymmetry of elastic $eN$ scattering in the leading logarithm approximation

The beam normal spin asymmetry for the elastic $eN$ scattering is studied in the leading logarithm approximation. We derive the expression for the asymmetry, which is valid for any scattering angles. The result is compared with the results of other authors, obtained for the forward kinematics. We also calculate the numerical values of the asymmetry at intermediate energy and show that they are consistent with existing experimental data.

nucl-th↗

arXiv2005

Target Normal Spin Asymmetry of the Elastic ep-Scattering at Resonance Energy

We study the target normal spin asymmetry for the reaction $ep \to ep$ at electron energy up to few GeV in the laboratory frame. The asymmetry is proportional to the imaginary part of the reaction scattering amplitude. To estimate the imaginary part of the amplitude we use the unitarity relation and saturate the intermediate hadron states by the proton and resonances from the first, second and third resonance regions. The resonance electromagnetic transition amplitudes, needed to evaluate the asymmetry, are taken from experiment.

nucl-th↗

arXiv2003

New Family of Exotic $Θ$-Baryons

From the interpretation of the $Θ^+$ baryon resonance as an excitation of the ``skyrmion liquid'' with SU(3) flavor symmetry $\bar{10}$ we deduce a new series of baryons, $Θ_1^{++}$, $Θ_1^{+}$ and $Θ_1^0$, situated at the top of the 27-plet of SU(3) flavor, with hypercharge Y=2, isospin T=1 and spin $J=\frac32$. The mass of $Θ_1$ is estimated 55 MeV/c^2 higher then the mass of $Θ^+$ and its width at 80 MeV. We also discuss the other baryons from the 27-plet.

hep-ph↗