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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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7 papers · 2 filters
The photon structure and exclusive production of vector mesons in gamma-gamma collisions
L. Motyka, B. Ziaja
The process of exclusive vector meson production (gamma gamma to J/psi rho^0) is studied for almost real photons. This process may be reduced to photoproduction of J/psi off the rh…
Theoretical description of the total gamma*gamma* cross-section and its confrontation with the LEP data on doubly tagged e+e- events
J. Kwiecinski, L. Motyka
We perform a detailed analysis of the total inelastic cross-section for gamma*gamma* collisions. Different contributions coming from the quark box diagram, reggeons, the soft and h…
Hard and soft QCD in charmonium production
C. B. Mariotto, M. B. Gay Ducati, G. Ingelman
We show that both hard perturbative and soft non-perturbative QCD effects are important in hadroproduction of charmonium. Observed and distributions of J/psi in fix…
Nonlinear sigma model approach for chiral fluctuations and symmetry breakdown in Nambu-Jona-Lasinio model
Egor Babaev
In this paper we discuss symmetry breakdown in NJL model at low N_c. In particular we propose a modified NJL model that displays a symmetry breakdown and also at finite temperature…
QCD predictions for spin dependent photonic structure function in the low x region of future linear colliders
J. Kwiecinski, B. Ziaja
Spin dependent structure function of the polarised photon is analysed within the formalism based upon the unintegrated spin dependent parton distributions incorporat…
Rapidity gaps at HERA and the Tevatron from soft colour exchanges
R. Enberg, G. Ingelman, N. Timneanu
Models based on soft colour exchanges to rearrange colour strings in the final state provide a general framework for both diffractive and non-diffractive events in ep and hadron-ha…
Parametrisation of F_2^gamma at low Q^2 and of sigma(gamma,gamma) and sigma(gamma^*,gamma) at high energies
B. Badelek, M. Krawczyk, J. Kwiecinski +1
A parametrisation of the real photon structure function F_2^gamma in the low Q^2, low x region is formulated. It includes both the VMD and the QCD components, the latter suitably e…