| アブストラクト: |
Quantum Chromodynamics, the fundamental theory of strong interactions, is
the only self consistent quantum field theory. However at present it only
provides unambiguous predictions for hard incoherent processes. A new domain
has recently emerged - coherent interactions of small color dipoles, for which
model independent predictions are possible. Among the key predictions were
a strong suppression of coherent interactions (color transparency) and
a proportionality of the scattering amplitude to the gluon density of
the target. The first unambigous discovery of the color transparency
phenomenon and confirmation of the theory was reported by the FNAL E791
experiment which observed pion coherent dissociation into two jets.
Complementary evidence came from experiments at the electron - proton
collider at Hamburg (HERA) which observed exclusive production of vector
mesons in deep inelastic scattering. Future studies in this field will
include looking for the color transparency regime for kinematics where
space-time evolution of the interacting wave package is important using
electron and hadron nucleus hard exclusive processes at energies 10-50 GeV,
as well as for the onset of the color opacity regime in ultraperipheral
collisions at LHC.
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