Eur. Phys. J. C 20, 29-49
DOI: 10.1007/s100520100634
Diffractive jet production in deep-inelastic e+p collisions at HERA
The H1 Collaboration C. Adloff and et al.Fachbereich Physik, Bergische Universität Gesamthochschule Wuppertal, Wuppertal, Germany
(Received: 21 December 2000 / Published online: 6 April 2001 -© Springer-Verlag 2001)
Abstract
A measurement is presented of dijet and 3-jet cross sections in
low-|t| diffractive deep-inelastic scattering interactions of the
type
, where the system X is separated by a
large rapidity gap from a low-mass baryonic system Y. Data taken
with the H1 detector at HERA, corresponding to an integrated
luminosity of
, are used to measure hadron level
single and double differential cross sections for
,
and
. The energy flow not
attributed to jets is also investigated. The measurements are
consistent with a factorising diffractive exchange with trajectory
intercept close to 1.2 and tightly constrain the dominating
diffractive gluon distribution. Viewed in terms of the diffractive
scattering of partonic fluctuations of the photon, the data require
the dominance of
over
states. Soft
colour neutralisation models in their present form cannot
simultaneously reproduce the shapes and the normalisations of the
differential cross sections. Models based on 2-gluon exchange are able
to reproduce the shapes of the cross sections at low
values.
© Società Italiana di Fisica, Springer-Verlag 2001