Thrust jet analysis of deep-inelastic large-rapidity-gap events

  • H1 Collaboration
  • C. Adloff et al.
Experimental physics


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 \(10 < Q^2 < 100 {\rm GeV}^2\), grows with hadronic mass \(M_X\) and implies a dominant 2-jet topology. Thrust is found to decrease with growing \(P_t\), the thrust jet momentum transverse to the photon-proton collision axis. Distributions of \(P_t^2\) are consistent with being independent of \(M_X\). They show a strong alignment of the thrust axis with the photon-proton collision axis, and have a large high\(-P_t\) tail. The correlation of thrust with \(M_X\) is similar to that in \(e^+e^-\)annihilation at \(\sqrt s_{ee}=M_X\), but with lower values of thrust in the \(ep\) data. The data cannot be described by interpreting the dissociated system \(X\) as a \(q\bar q\) state but inclusion of a substantial fraction of \(q\bar q g\) parton configurations leads naturally to the observed properties. The soft colour exchange interaction model does not describe the data.


Momentum Transverse Exchange Interaction Interaction Model Colour Exchange Substantial Fraction 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • H1 Collaboration
  • C. Adloff et al.
    • 1
  1. 1. Fachbereich Physik, Bergische Universität Gesamthochschule Wuppertal, D-42097 Wuppertal, Germany DE

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