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In this work, a method for evaluating the cross sections of electroproduction of and off protons in the region of invariant masses of final hadrons GeV ( and being the masses of the kaon and hyperon, respectively) and squares of four-momentum transfers of virtual photons, i.e., photon virtualities GeV , is developed based on experimental data of these exclusive channels' cross sections measured by the CLAS detector in Hall B at Jefferson Lab. A set of algorithms has been implemented to evaluate the differential cross sections of these channels, along with their statistical and systematic uncertainties. A program was developed for the evaluation of differential cross sections and structure functions using C++ and Python libraries. An interactive website was created for working with the program, enabling the analysis of one-dimensional and two-dimensional dependences of structure functions and differential cross sections. The evaluation of differential cross sections for the and electroproduction channels is necessary for extracting the structure function from the data on the polarization asymmetry of electroproduction reactions of these final states with longitudinally polarized electrons. The obtained results are also important for the development of realistic Monte Carlo event generators in planning future experiments and for evaluating the efficiency of detecting final particles when extracting reaction cross sections from experimental data. [ABSTRACT FROM AUTHOR]

In this work, we study the photoproduction of ρ$$ \rho $$ mesons considering the proton and the nucleus as the target. Utilizing the dipole picture and the wave functions obtained via AdS/QCD, we were able to describe the HERA γp$$ \gamma p $$ data and extend the formalism to the nuclear case considering the Glauber–Gribov model. The preliminary results obtained in the nuclear regime are compared to the recent LHC PbPb→ρPbPb$$ PbPb\to \rho PbPb $$ data and suggest the presence of a nuclear effect called shadowing. [ABSTRACT FROM AUTHOR]

The exclusive photo‐ and electroproduction of light vector mesons like ρ,ω,$$ \rho, \omega, $$ and ϕ$$ \phi $$ is studied in γp$$ \gamma p $$ collisions within the color dipole formalism with vector meson wave functions obtained using the AdS/QCD holographic approach. This setup provides a good description of the existing data for the ground vector mesons ρ(1S),ω(1S),andϕ(1S)$$ \rho (1S),\kern0.3em \omega (1S),\kern0.3em \mathrm{and}\kern0.3em \phi (1S) $$ and permits us to make predictions for the corresponding excited states. The results show significant theoretical uncertainties related to modeling the partial dipole amplitude, which can be constrained with upcoming measurements in future hadron colliders. [ABSTRACT FROM AUTHOR]

The electroproduction of phi meson is analyzed. The amplitude consist of two terms, the soft and the hard pomeron terms. it is assumed, that both pomerons are Regge poles. In the present approach, the two pomeron amplitude for the photoproduction processes is extended to construct an amplitude for the electroproduction processes by introducing the photon virtual mass ( . The residues of the two poles become functions of ( . These functions are extracted by fitting the differential cross section ( ) of the extended model at constant energy to the experimental data using the chi- square method. At each , the hard and the soft terms are multiplied by the factors and to match the data. The vertices of the pomeron coupling to the interacting particles are calculated by the dimensions of the vertices which are related to the masses of the interacting particles at each vertex.

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