Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 26, Issue 2, Pages 261-270Publisher
SPRINGER
DOI: 10.1140/epjc/s2002-01054-9
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We study Pomeron-Odderon interference effects giving rise to charge and single-spin,asymmetries in diffractive electroproduction of a pi+pi- pair. We calculate these asymmetries, originating from both longitudinal and transverse polarizations of the virtual photon, in the framework of QCD and in the Born approximation, in a kinematical domain accessible to HERA experiments. We predict a sizable charge asymmetry with a characteristic dependence on the invariant mass of the pi+pi- pair, which makes this observable very important for establishing the magnitude of the Odderon exchange in hard processes. The single-spin asymmetry turns out to be rather small. We briefly discuss future improvements of our calculations and their possible effects on the results.
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