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On the basis of the assumption of quark-hadron duality, it is shown that the color-singlet contribution to the cross sections for the processes e + g → e + J/ψ + g and gg → J/ψg increases upon taking into account the relative motion of quarks in the J/ψ meson. [ABSTRACT FROM AUTHOR]

Results of recent studies that indicate that allowance for the relative motion of quarks in mesons leads to an increase in the cross sections for the process e + e − → J/ ψη c are confirmed. It is shown that the same effect also leads to an increase in the width of scalar and tensor mesons with respect to their decay to two vector mesons, so that the decays χ b0,2 → 2 J/ ψ can be used to observe these mesons at the Tevatron collider and LHC. [ABSTRACT FROM AUTHOR]

Results of recent studies that indicate that allowance for the relative motion of quarks in mesons leads to an increase in the cross sections for the process e + e − → J/ ψη c are confirmed. It is shown that the same effect also leads to an increase in the width of scalar and tensor mesons with respect to their decay to two vector mesons, so that the decays χ b0,2 → 2 J/ ψ can be used to observe these mesons at the Tevatron collider and LHC. [ABSTRACT FROM AUTHOR]

The inclusive production of heavy quarks and quarkonia in photon-photon collisions at the LEP2 collider is considered within the semihard ( k T-factorization) QCD approach. The dependence of the total and differential cross sections for the production of heavy ( c and b) quarks and D* and J/ψ mesons on the choice of unintegrated gluon distribution is studied. The transition of a $$c\bar c$$ charmed pair to observed J/ψ mesons is described on the basis of the color-singlet model. The results of the calculations are compared with currently available experimental data obtained by the L3, OPAL, ALEPH, and DELPHI Collaborations. It is shown that the polarization properties of J/ψ mesons at the LEP2 collider are sensitive to the behavior of unintegrated gluon distributions. This means that experimental investigations of the polarization properties of quarkonia in photon-photon collisions may provide a direct test of the dynamics of gluon distributions in the photon. [ABSTRACT FROM AUTHOR]