par Adloff, Catherine;Clerbaux, Barbara 
;Favart, Laurent ;Marage, Pierre ; [et al.]
Référence European Physical Journal C. Particles and Fields, 1, page (495-507)
Publication Publié, 1998
;Favart, Laurent ;Marage, Pierre ; [et al.]Référence European Physical Journal C. Particles and Fields, 1, page (495-507)
Publication Publié, 1998
Article révisé par les pairs
| Résumé : | 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 < Q2 < 100 GeV2, 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 P2t 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 √see = MX , but with lower values of thrust in the ep data. The data cannot be described by interpreting the dissociated system X as a qq̄ state but inclusion of a substantial fraction of qq̄g parton configurations leads naturally to the observed properties. The soft colour exchange interaction model does not describe the data. |
