Thrust jet analysis of deep-inelastic large-rapidity-gap events
H1 Collaboration, C. Adloff35 et al.
35 Fachbereich Physik, Bergische Universität Gesamthochschule Wuppertal, D-42097 Wuppertal, Germany
Received: 18 November 1997
Abstract
A thrust analysis of
Large-Rapidity-Gap events in deep-inelastic ep collisions is presented,
using data taken with the H1 detector at HERA in 1994.
The average thrust of the final states X, which
emerge from the dissociation of virtual photons
in the range 
,grows with hadronic mass MX
and implies a dominant 2-jet topology.
Thrust is found to decrease with growing Pt,
the thrust jet momentum transverse to the photon-proton collision axis.
Distributions of Pt2
are consistent with being independent of MX.
They show a strong alignment of the thrust axis with the
photon-proton collision axis,
and have a large high-Pt tail.
The correlation of thrust with MX is similar to that
in e+e-annihilation at 
,but with lower values of thrust in the ep data.
The data cannot be described by interpreting the dissociated system
X as a 
state
but inclusion of a substantial fraction of 
parton configurations
leads naturally to the observed properties.
The soft colour exchange interaction model
does not describe the data.
Copyright Springer-Verlag
