Conveners
Structure functions of hadrons and nuclei
- Anatoly Kotikov (JINR)
Structure functions of hadrons and nuclei
- Andrej Arbuzov (BLTP JINR)
Properties and applications of QED parton distribution and fragmentation functions are discussed. Optimization of the factorization scale choice is demonstrated for specific processes. A new factorization scheme is proposed for Drell-Yan processes in QED. Features of QED and QCD parton distribution functions are compared.
The constant growth of energies in particle accelerators gives grounds to raise the question of studying few-nucleon atomic nuclei within the framework of the relativistic approach. The well-studied quantum mechanical formalisms of Faddeev [1] and Yakubovsky [2] are not suitable for this due to their non-relativistic nature.
In our recent work [3], we carried out a relativistic generalization...
We present detailed analysis of the T-even and T-odd lepton angular distribution in the Drell-Yan
process including γ/Zˆ0 gauge boson exchange and using perturbative QCD based on the collinear
factorization scheme at leading order in the α_s expansion and α_sˆ2 for T-odd . We focus on the
study of the transverse momentum Q_T dependence of the corresponding hadronic structure functions and...
In the report, the off-shell electromagnetic pion form factors in the Bethe-Salpeter formalism are considered. The separable kernel of the first rank quark-antiquark interaction is used to solve the equation analytically. The half-off-shell pion form factors $F_1$ and $F_2$ , which are related to each other by the Ward-Takahashi identity, are calculated. The obtained off-shell form factors as...
We investigate the contribution of the 12-th order QED corrections to the anomalous magnetic moment $a_L$ of a lepton $L$ ($L=e,~\mu$ and $\tau$) from diagrams with insertions of the photon vacuum polarisation operator consisting solely of purely lepton loops. The approach is based on consistent applications of dispersion relations for the polarisation operator and the Mellin-Barnes integral...
We have demonstrated that the charge sum rules for the quark fragmentation functions hold including simultaneously the contributions of mesons and baryons providing the conservation of the strangeness, electric and baryon charges. We also obtained the expression for the isospin conservation. The results are compatible to Gell-Mann–Nishijima formulas for quarks and hadrons manifesting a new...
The multipole expansion for electron–nucleus scattering within the electromagnetic theory has proven highly effective as it provides detailed information about the structure of nuclei. However, at the high energies achieved by electron accelerators (about 105 GeV at CERN since 2000), both the weak and electromagnetic interactions should be considered simultaneously. This presentation...
