arXiv subjects
Publications and source records attributed to L. Gladilin.
Linac-ring analogues of the LHC and VLHC based standard type ep collider proposals are discussed. It is shown that sufficiently high luminosities can be obtained with TESLA-like linacs, whereas essential modifications are required for CLIC technology. The physics search potential of proposed ep colliders is demonstrated using pair production of heavy quarks as an example.
Recent results on charm and beauty photoproduction at HERA are discussed. The perturbative QCD calculations are generally smaller than the measured cross sections, particularly in the forward (proton) direction. The study of charm dijet photoproduction is consistent with a significant contribution of charm excitation processes.
The total cross sections of charm and beauty production at a future high-energy ep collider, THERA, are expected to increase by factors of three and five, respectively, as compared to HERA. Heavy quarks can be measured at THERA in wide ranges of transverse momenta and Q^2 values, thereby providing a solid basis for testing the perturbative QCD calculations. The charm and beauty contributions to the proton structure can be probed at THERA at ~1 order of magnitude smaller Bjorken x values with respect to those at HERA. Charm production in the process of photon-gluon fusion at THERA can serve for the determination of the gluon structure of the proton in the as yet unexplored kinematic range 10^{-5} < x_g < 10^{-4}. The cross section of charm production in charged current at THERA is ~1 order of magnitude larger than that at HERA.
The world average values for the probabilities that a charm quark fragments into D^*+ and Ds^+ have been calculated to be f(c->D^*+)=0.235+/-0.007(+/-0.007) and f(c->Ds^+)=0.101+/-0.009(+/-0.025), respectively. The average values for D^0, D^+ and Lambda_c^+ have been also calculated.