DOI: 10.1140/epjc/s2002-01054-9
Pomeron-Odderon interference effects in electroproduction of two pions
Ph. Hägler1, B. Pire2, L. Szymanowski2, 3 and O.V. Teryaev41 Universität Regensburg, Institut für Theoretische Physik, 93040 Regensburg, Germany
2 CPhT, École Polytechnique, 91128 Palaiseau, France
3 Soltan Institute for Nuclear Studies, Hoza 69, 00-681 Warsaw, Poland
4 Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna, Russia
(Received: 18 July 2002 / Published online: 25 October 2002 )
Abstract
We study Pomeron-Odderon interference effects giving rise to
charge and single-spin
asymmetries in diffractive electroproduction of a
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
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.
© Società Italiana di Fisica, Springer-Verlag 2002
