منابع مشابه
Exclusive Processes in QCD
Exclusive and semi-exclusive processes, the diffractive dissociation of hadrons into jets, and hard diffractive processes such as vector meson leptoproduction provide new testing grounds for QCD and essential information on the structure of light-cone wavefunctions of hadrons, particularly the pion distribution amplitude. I review the basic features of the leading-twist QCD predictions and the ...
متن کاملExclusive Photon - Photon Processes
Exclusive yy -+ hadron pairs are among the most fundamental processes in &CD, providing a detailed examination of Compton scattering in the crossed channel. In the high momentum transfer domain (s, t, large, 19,~ for t/s fixed), these processes can be computed from first principles in &CD, yielding important information on the nature of the QCD coupling a, and the form of hadron distribution am...
متن کاملExclusive Processes at Colliders
Up to now the investigations at high energies were concentrated on inclusive processes, i.e. processes (measurements) when only one object of many produced simultaneously is recorded. Naively, these processes seem to be difficult but can be well described within the standard parton model. The exclusive processes seems naively easier, but in reality require detailed knowledge of the QCD dynamics...
متن کاملExclusive processes at HERA
Exclusive processes, such as diffractive production of vector mesons, γp → V p with V = ρ, ω, φ, J/ψ, ψ,Υ, and Deeply Virtual Compton Scattering (DVCS), γp → γ p, shown in Figure 1, have been extensively studied at HERA. The variables that describe the exclusive process are (Figure 1): the mass of the vector meson, M , the photon virtuality, Q, the four-momentum transfer squared at the proton v...
متن کاملApproximating spatially exclusive invasion processes.
A number of biological processes, such as invasive plant species and cell migration, are composed of two key mechanisms: motility and reproduction. Due to the spatially exclusive interacting behavior of these processes a cellular automata (CA) model is specified to simulate a one-dimensional invasion process. Three (independence, Poisson, and 2D-Markov chain) approximations are considered that ...
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ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 2003
ISSN: 1434-6044,1434-6052
DOI: 10.1140/epjc/s2003-01294-1