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The angular distributions in the Higgs-strahlung process e + e - → HZ → H f f are uniquely determined in the Standard Model. We study how these predictions are modified if non-standard couplings are present in the ZZH vertex, as well as lepton-boson contact terms. We restrict ourselves to the set of operators which are singlets under standard SU 3 SU 2 U 1 ...
Inelastic photoproduction of J/ψ particles at high energies is one of the processes to determine the gluon distribution in the nucleon. We have calculated the QCD radiative corrections to the color-singlet model of this reaction. They are large at moderate photon energies, but decrease with increasing energies. The cross section and the J/ψ energy spectrum are compared with the available fixed-target...
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