Nonlinearity of vacuum Reggeons and exclusive diffractive production of vector mesons at HERA
- Institute for High Energy Physics, 142281 Protvino (Russian Federation)
The processes of exclusive photo- and electroproduction of vector mesons {rho}{sup 0}(770), {phi}(1020), and J/{psi}(3096) at collision energies 30 GeV<W<300 GeV and transferred momenta squared 0<-t<2 GeV{sup 2} are considered in the framework of a phenomenological Regge-eikonal scheme with nonlinear Regge trajectories in which their QCD asymptotic behavior is taken into account explicitly. By comparison of available experimental data from ZEUS and H1 Collaborations with the model predictions it is demonstrated that corresponding angular distributions and integrated cross sections in the above-mentioned kinematical range can be quantitatively described with use of two C-even vacuum Regge trajectories. These are the 'soft' Pomeron dominating the high-energy reactions without a hard scale and the 'hard' Pomeron giving an essential contribution to photo- and electroproduction of heavy vector mesons and deeply virtual electroproduction of light vector mesons.
- OSTI ID:
- 21250632
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 78, Issue 3; Other Information: DOI: 10.1103/PhysRevD.78.034028; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANGULAR DISTRIBUTION
ASYMPTOTIC SOLUTIONS
COLLISIONS
COMPARATIVE EVALUATIONS
CROSS SECTIONS
EIKONAL APPROXIMATION
ELECTROPRODUCTION
FORECASTING
GEV RANGE
HERA STORAGE RING
MULTIPARTICLE SPECTROMETERS
NONLINEAR PROBLEMS
PARTICLE IDENTIFICATION
PHOTOPRODUCTION
POMERANCHUK PARTICLES
QUANTUM CHROMODYNAMICS
REGGE TRAJECTORIES
VECTOR MESONS